fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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5902 lines
207 KiB
5902 lines
207 KiB
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/db_impl/db_impl.h"
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#include <stdint.h>
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#ifdef OS_SOLARIS
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#include <alloca.h>
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#endif
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#include <algorithm>
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#include <cinttypes>
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#include <cstdio>
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#include <map>
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#include <set>
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#include <sstream>
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#include <stdexcept>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include <vector>
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#include "db/arena_wrapped_db_iter.h"
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#include "db/builder.h"
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#include "db/compaction/compaction_job.h"
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#include "db/db_info_dumper.h"
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#include "db/db_iter.h"
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#include "db/dbformat.h"
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#include "db/error_handler.h"
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#include "db/event_helpers.h"
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#include "db/external_sst_file_ingestion_job.h"
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#include "db/flush_job.h"
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#include "db/forward_iterator.h"
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#include "db/import_column_family_job.h"
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#include "db/job_context.h"
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#include "db/log_reader.h"
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#include "db/log_writer.h"
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#include "db/malloc_stats.h"
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#include "db/memtable.h"
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#include "db/memtable_list.h"
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#include "db/merge_context.h"
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#include "db/merge_helper.h"
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#include "db/periodic_task_scheduler.h"
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#include "db/range_tombstone_fragmenter.h"
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#include "db/table_cache.h"
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#include "db/table_properties_collector.h"
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#include "db/transaction_log_impl.h"
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#include "db/version_set.h"
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#include "db/write_batch_internal.h"
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#include "db/write_callback.h"
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#include "env/unique_id_gen.h"
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#include "file/file_util.h"
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#include "file/filename.h"
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#include "file/random_access_file_reader.h"
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#include "file/sst_file_manager_impl.h"
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#include "logging/auto_roll_logger.h"
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#include "logging/log_buffer.h"
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#include "logging/logging.h"
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#include "monitoring/in_memory_stats_history.h"
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#include "monitoring/instrumented_mutex.h"
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#include "monitoring/iostats_context_imp.h"
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#include "monitoring/perf_context_imp.h"
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#include "monitoring/persistent_stats_history.h"
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#include "monitoring/thread_status_updater.h"
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#include "monitoring/thread_status_util.h"
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#include "options/cf_options.h"
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#include "options/options_helper.h"
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#include "options/options_parser.h"
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#include "port/port.h"
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#include "rocksdb/cache.h"
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#include "rocksdb/compaction_filter.h"
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#include "rocksdb/convenience.h"
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#include "rocksdb/db.h"
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#include "rocksdb/env.h"
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#include "rocksdb/merge_operator.h"
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#include "rocksdb/statistics.h"
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#include "rocksdb/stats_history.h"
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#include "rocksdb/status.h"
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#include "rocksdb/table.h"
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#include "rocksdb/version.h"
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#include "rocksdb/write_buffer_manager.h"
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#include "table/block_based/block.h"
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#include "table/block_based/block_based_table_factory.h"
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#include "table/get_context.h"
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#include "table/merging_iterator.h"
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#include "table/multiget_context.h"
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#include "table/sst_file_dumper.h"
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#include "table/table_builder.h"
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#include "table/two_level_iterator.h"
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#include "table/unique_id_impl.h"
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#include "test_util/sync_point.h"
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#include "trace_replay/trace_replay.h"
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#include "util/autovector.h"
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#include "util/cast_util.h"
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#include "util/coding.h"
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#include "util/compression.h"
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#include "util/crc32c.h"
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#include "util/defer.h"
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#include "util/distributed_mutex.h"
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#include "util/hash_containers.h"
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#include "util/mutexlock.h"
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#include "util/stop_watch.h"
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#include "util/string_util.h"
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#include "utilities/trace/replayer_impl.h"
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namespace ROCKSDB_NAMESPACE {
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const std::string kDefaultColumnFamilyName("default");
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const std::string kPersistentStatsColumnFamilyName(
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"___rocksdb_stats_history___");
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void DumpRocksDBBuildVersion(Logger* log);
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CompressionType GetCompressionFlush(
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const ImmutableCFOptions& ioptions,
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const MutableCFOptions& mutable_cf_options) {
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// Compressing memtable flushes might not help unless the sequential load
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// optimization is used for leveled compaction. Otherwise the CPU and
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// latency overhead is not offset by saving much space.
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if (ioptions.compaction_style == kCompactionStyleUniversal &&
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mutable_cf_options.compaction_options_universal
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.compression_size_percent >= 0) {
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return kNoCompression;
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}
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if (mutable_cf_options.compression_per_level.empty()) {
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return mutable_cf_options.compression;
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} else {
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// For leveled compress when min_level_to_compress != 0.
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return mutable_cf_options.compression_per_level[0];
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}
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}
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namespace {
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void DumpSupportInfo(Logger* logger) {
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ROCKS_LOG_HEADER(logger, "Compression algorithms supported:");
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for (auto& compression : OptionsHelper::compression_type_string_map) {
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if (compression.second != kNoCompression &&
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compression.second != kDisableCompressionOption) {
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ROCKS_LOG_HEADER(logger, "\t%s supported: %d", compression.first.c_str(),
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CompressionTypeSupported(compression.second));
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}
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}
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ROCKS_LOG_HEADER(logger, "Fast CRC32 supported: %s",
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crc32c::IsFastCrc32Supported().c_str());
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ROCKS_LOG_HEADER(logger, "DMutex implementation: %s", DMutex::kName());
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}
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} // namespace
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DBImpl::DBImpl(const DBOptions& options, const std::string& dbname,
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const bool seq_per_batch, const bool batch_per_txn,
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bool read_only)
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: dbname_(dbname),
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own_info_log_(options.info_log == nullptr),
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init_logger_creation_s_(),
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initial_db_options_(SanitizeOptions(dbname, options, read_only,
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&init_logger_creation_s_)),
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env_(initial_db_options_.env),
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io_tracer_(std::make_shared<IOTracer>()),
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immutable_db_options_(initial_db_options_),
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fs_(immutable_db_options_.fs, io_tracer_),
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mutable_db_options_(initial_db_options_),
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stats_(immutable_db_options_.stats),
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#ifdef COERCE_CONTEXT_SWITCH
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mutex_(stats_, immutable_db_options_.clock, DB_MUTEX_WAIT_MICROS, &bg_cv_,
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immutable_db_options_.use_adaptive_mutex),
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#else // COERCE_CONTEXT_SWITCH
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mutex_(stats_, immutable_db_options_.clock, DB_MUTEX_WAIT_MICROS,
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immutable_db_options_.use_adaptive_mutex),
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#endif // COERCE_CONTEXT_SWITCH
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default_cf_handle_(nullptr),
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error_handler_(this, immutable_db_options_, &mutex_),
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event_logger_(immutable_db_options_.info_log.get()),
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max_total_in_memory_state_(0),
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file_options_(BuildDBOptions(immutable_db_options_, mutable_db_options_)),
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file_options_for_compaction_(fs_->OptimizeForCompactionTableWrite(
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file_options_, immutable_db_options_)),
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seq_per_batch_(seq_per_batch),
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batch_per_txn_(batch_per_txn),
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next_job_id_(1),
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shutting_down_(false),
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db_lock_(nullptr),
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manual_compaction_paused_(false),
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bg_cv_(&mutex_),
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logfile_number_(0),
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log_dir_synced_(false),
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log_empty_(true),
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persist_stats_cf_handle_(nullptr),
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log_sync_cv_(&log_write_mutex_),
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total_log_size_(0),
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is_snapshot_supported_(true),
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write_buffer_manager_(immutable_db_options_.write_buffer_manager.get()),
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write_thread_(immutable_db_options_),
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nonmem_write_thread_(immutable_db_options_),
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write_controller_(mutable_db_options_.delayed_write_rate),
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last_batch_group_size_(0),
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unscheduled_flushes_(0),
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unscheduled_compactions_(0),
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bg_bottom_compaction_scheduled_(0),
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bg_compaction_scheduled_(0),
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num_running_compactions_(0),
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bg_flush_scheduled_(0),
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num_running_flushes_(0),
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bg_purge_scheduled_(0),
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disable_delete_obsolete_files_(0),
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pending_purge_obsolete_files_(0),
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delete_obsolete_files_last_run_(immutable_db_options_.clock->NowMicros()),
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last_stats_dump_time_microsec_(0),
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has_unpersisted_data_(false),
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unable_to_release_oldest_log_(false),
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num_running_ingest_file_(0),
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#ifndef ROCKSDB_LITE
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wal_manager_(immutable_db_options_, file_options_, io_tracer_,
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seq_per_batch),
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#endif // ROCKSDB_LITE
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bg_work_paused_(0),
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bg_compaction_paused_(0),
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refitting_level_(false),
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opened_successfully_(false),
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#ifndef ROCKSDB_LITE
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periodic_task_scheduler_(),
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#endif // ROCKSDB_LITE
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two_write_queues_(options.two_write_queues),
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manual_wal_flush_(options.manual_wal_flush),
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// last_sequencee_ is always maintained by the main queue that also writes
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// to the memtable. When two_write_queues_ is disabled last seq in
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// memtable is the same as last seq published to the readers. When it is
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// enabled but seq_per_batch_ is disabled, last seq in memtable still
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// indicates last published seq since wal-only writes that go to the 2nd
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// queue do not consume a sequence number. Otherwise writes performed by
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// the 2nd queue could change what is visible to the readers. In this
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// cases, last_seq_same_as_publish_seq_==false, the 2nd queue maintains a
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// separate variable to indicate the last published sequence.
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last_seq_same_as_publish_seq_(
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!(seq_per_batch && options.two_write_queues)),
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// Since seq_per_batch_ is currently set only by WritePreparedTxn which
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// requires a custom gc for compaction, we use that to set use_custom_gc_
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// as well.
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use_custom_gc_(seq_per_batch),
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shutdown_initiated_(false),
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own_sfm_(options.sst_file_manager == nullptr),
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closed_(false),
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atomic_flush_install_cv_(&mutex_),
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blob_callback_(immutable_db_options_.sst_file_manager.get(), &mutex_,
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&error_handler_, &event_logger_,
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immutable_db_options_.listeners, dbname_) {
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// !batch_per_trx_ implies seq_per_batch_ because it is only unset for
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// WriteUnprepared, which should use seq_per_batch_.
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assert(batch_per_txn_ || seq_per_batch_);
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// Reserve ten files or so for other uses and give the rest to TableCache.
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// Give a large number for setting of "infinite" open files.
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const int table_cache_size = (mutable_db_options_.max_open_files == -1)
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? TableCache::kInfiniteCapacity
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: mutable_db_options_.max_open_files - 10;
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LRUCacheOptions co;
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co.capacity = table_cache_size;
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co.num_shard_bits = immutable_db_options_.table_cache_numshardbits;
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co.metadata_charge_policy = kDontChargeCacheMetadata;
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table_cache_ = NewLRUCache(co);
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SetDbSessionId();
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assert(!db_session_id_.empty());
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#ifndef ROCKSDB_LITE
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periodic_task_functions_.emplace(PeriodicTaskType::kDumpStats,
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[this]() { this->DumpStats(); });
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periodic_task_functions_.emplace(PeriodicTaskType::kPersistStats,
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[this]() { this->PersistStats(); });
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periodic_task_functions_.emplace(PeriodicTaskType::kFlushInfoLog,
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[this]() { this->FlushInfoLog(); });
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periodic_task_functions_.emplace(
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PeriodicTaskType::kRecordSeqnoTime,
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[this]() { this->RecordSeqnoToTimeMapping(); });
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#endif // ROCKSDB_LITE
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versions_.reset(new VersionSet(dbname_, &immutable_db_options_, file_options_,
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table_cache_.get(), write_buffer_manager_,
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&write_controller_, &block_cache_tracer_,
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io_tracer_, db_id_, db_session_id_));
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column_family_memtables_.reset(
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new ColumnFamilyMemTablesImpl(versions_->GetColumnFamilySet()));
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DumpRocksDBBuildVersion(immutable_db_options_.info_log.get());
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DumpDBFileSummary(immutable_db_options_, dbname_, db_session_id_);
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immutable_db_options_.Dump(immutable_db_options_.info_log.get());
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mutable_db_options_.Dump(immutable_db_options_.info_log.get());
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DumpSupportInfo(immutable_db_options_.info_log.get());
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max_total_wal_size_.store(mutable_db_options_.max_total_wal_size,
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std::memory_order_relaxed);
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if (write_buffer_manager_) {
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wbm_stall_.reset(new WBMStallInterface());
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}
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}
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Status DBImpl::Resume() {
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ROCKS_LOG_INFO(immutable_db_options_.info_log, "Resuming DB");
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InstrumentedMutexLock db_mutex(&mutex_);
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if (!error_handler_.IsDBStopped() && !error_handler_.IsBGWorkStopped()) {
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// Nothing to do
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return Status::OK();
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}
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if (error_handler_.IsRecoveryInProgress()) {
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// Don't allow a mix of manual and automatic recovery
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return Status::Busy();
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}
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mutex_.Unlock();
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Status s = error_handler_.RecoverFromBGError(true);
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mutex_.Lock();
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return s;
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}
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// This function implements the guts of recovery from a background error. It
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// is eventually called for both manual as well as automatic recovery. It does
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// the following -
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// 1. Wait for currently scheduled background flush/compaction to exit, in
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// order to inadvertently causing an error and thinking recovery failed
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// 2. Flush memtables if there's any data for all the CFs. This may result
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// another error, which will be saved by error_handler_ and reported later
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// as the recovery status
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// 3. Find and delete any obsolete files
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// 4. Schedule compactions if needed for all the CFs. This is needed as the
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// flush in the prior step might have been a no-op for some CFs, which
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// means a new super version wouldn't have been installed
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Status DBImpl::ResumeImpl(DBRecoverContext context) {
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mutex_.AssertHeld();
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WaitForBackgroundWork();
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Status s;
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if (shutdown_initiated_) {
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// Returning shutdown status to SFM during auto recovery will cause it
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// to abort the recovery and allow the shutdown to progress
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s = Status::ShutdownInProgress();
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}
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if (s.ok()) {
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Status bg_error = error_handler_.GetBGError();
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if (bg_error.severity() > Status::Severity::kHardError) {
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ROCKS_LOG_INFO(
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immutable_db_options_.info_log,
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"DB resume requested but failed due to Fatal/Unrecoverable error");
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s = bg_error;
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}
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}
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// Make sure the IO Status stored in version set is set to OK.
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bool file_deletion_disabled = !IsFileDeletionsEnabled();
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if (s.ok()) {
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IOStatus io_s = versions_->io_status();
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if (io_s.IsIOError()) {
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// If resuming from IOError resulted from MANIFEST write, then assert
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// that we must have already set the MANIFEST writer to nullptr during
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// clean-up phase MANIFEST writing. We must have also disabled file
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// deletions.
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assert(!versions_->descriptor_log_);
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assert(file_deletion_disabled);
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// Since we are trying to recover from MANIFEST write error, we need to
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// switch to a new MANIFEST anyway. The old MANIFEST can be corrupted.
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// Therefore, force writing a dummy version edit because we do not know
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// whether there are flush jobs with non-empty data to flush, triggering
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// appends to MANIFEST.
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VersionEdit edit;
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auto cfh =
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static_cast_with_check<ColumnFamilyHandleImpl>(default_cf_handle_);
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assert(cfh);
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ColumnFamilyData* cfd = cfh->cfd();
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const MutableCFOptions& cf_opts = *cfd->GetLatestMutableCFOptions();
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s = versions_->LogAndApply(cfd, cf_opts, &edit, &mutex_,
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directories_.GetDbDir());
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if (!s.ok()) {
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io_s = versions_->io_status();
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if (!io_s.ok()) {
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s = error_handler_.SetBGError(io_s,
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BackgroundErrorReason::kManifestWrite);
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}
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}
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}
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}
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// We cannot guarantee consistency of the WAL. So force flush Memtables of
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// all the column families
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if (s.ok()) {
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FlushOptions flush_opts;
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// We allow flush to stall write since we are trying to resume from error.
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flush_opts.allow_write_stall = true;
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if (immutable_db_options_.atomic_flush) {
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autovector<ColumnFamilyData*> cfds;
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SelectColumnFamiliesForAtomicFlush(&cfds);
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mutex_.Unlock();
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s = AtomicFlushMemTables(cfds, flush_opts, context.flush_reason);
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mutex_.Lock();
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} else {
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for (auto cfd : versions_->GetRefedColumnFamilySet()) {
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if (cfd->IsDropped()) {
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continue;
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}
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InstrumentedMutexUnlock u(&mutex_);
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s = FlushMemTable(cfd, flush_opts, context.flush_reason);
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if (!s.ok()) {
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break;
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}
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}
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}
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if (!s.ok()) {
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ROCKS_LOG_INFO(immutable_db_options_.info_log,
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"DB resume requested but failed due to Flush failure [%s]",
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s.ToString().c_str());
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}
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}
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JobContext job_context(0);
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FindObsoleteFiles(&job_context, true);
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mutex_.Unlock();
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job_context.manifest_file_number = 1;
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if (job_context.HaveSomethingToDelete()) {
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PurgeObsoleteFiles(job_context);
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}
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job_context.Clean();
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if (s.ok()) {
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assert(versions_->io_status().ok());
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// If we reach here, we should re-enable file deletions if it was disabled
|
|
// during previous error handling.
|
|
if (file_deletion_disabled) {
|
|
// Always return ok
|
|
s = EnableFileDeletions(/*force=*/true);
|
|
if (!s.ok()) {
|
|
ROCKS_LOG_INFO(
|
|
immutable_db_options_.info_log,
|
|
"DB resume requested but could not enable file deletions [%s]",
|
|
s.ToString().c_str());
|
|
assert(false);
|
|
}
|
|
}
|
|
}
|
|
|
|
mutex_.Lock();
|
|
if (s.ok()) {
|
|
// This will notify and unblock threads waiting for error recovery to
|
|
// finish. Those previouly waiting threads can now proceed, which may
|
|
// include closing the db.
|
|
s = error_handler_.ClearBGError();
|
|
} else {
|
|
// NOTE: this is needed to pass ASSERT_STATUS_CHECKED
|
|
// in the DBSSTTest.DBWithMaxSpaceAllowedRandomized test.
|
|
// See https://github.com/facebook/rocksdb/pull/7715#issuecomment-754947952
|
|
error_handler_.GetRecoveryError().PermitUncheckedError();
|
|
}
|
|
|
|
if (s.ok()) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "Successfully resumed DB");
|
|
} else {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "Failed to resume DB [%s]",
|
|
s.ToString().c_str());
|
|
}
|
|
|
|
// Check for shutdown again before scheduling further compactions,
|
|
// since we released and re-acquired the lock above
|
|
if (shutdown_initiated_) {
|
|
s = Status::ShutdownInProgress();
|
|
}
|
|
if (s.ok()) {
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
SchedulePendingCompaction(cfd);
|
|
}
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
|
|
// Wake up any waiters - in this case, it could be the shutdown thread
|
|
bg_cv_.SignalAll();
|
|
|
|
// No need to check BGError again. If something happened, event listener would
|
|
// be notified and the operation causing it would have failed
|
|
return s;
|
|
}
|
|
|
|
void DBImpl::WaitForBackgroundWork() {
|
|
// Wait for background work to finish
|
|
while (bg_bottom_compaction_scheduled_ || bg_compaction_scheduled_ ||
|
|
bg_flush_scheduled_) {
|
|
bg_cv_.Wait();
|
|
}
|
|
}
|
|
|
|
// Will lock the mutex_, will wait for completion if wait is true
|
|
void DBImpl::CancelAllBackgroundWork(bool wait) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Shutdown: canceling all background work");
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
for (uint8_t task_type = 0;
|
|
task_type < static_cast<uint8_t>(PeriodicTaskType::kMax); task_type++) {
|
|
Status s = periodic_task_scheduler_.Unregister(
|
|
static_cast<PeriodicTaskType>(task_type));
|
|
if (!s.ok()) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"Failed to unregister periodic task %d, status: %s",
|
|
task_type, s.ToString().c_str());
|
|
}
|
|
}
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
InstrumentedMutexLock l(&mutex_);
|
|
if (!shutting_down_.load(std::memory_order_acquire) &&
|
|
has_unpersisted_data_.load(std::memory_order_relaxed) &&
|
|
!mutable_db_options_.avoid_flush_during_shutdown) {
|
|
if (immutable_db_options_.atomic_flush) {
|
|
autovector<ColumnFamilyData*> cfds;
|
|
SelectColumnFamiliesForAtomicFlush(&cfds);
|
|
mutex_.Unlock();
|
|
Status s =
|
|
AtomicFlushMemTables(cfds, FlushOptions(), FlushReason::kShutDown);
|
|
s.PermitUncheckedError(); //**TODO: What to do on error?
|
|
mutex_.Lock();
|
|
} else {
|
|
for (auto cfd : versions_->GetRefedColumnFamilySet()) {
|
|
if (!cfd->IsDropped() && cfd->initialized() && !cfd->mem()->IsEmpty()) {
|
|
InstrumentedMutexUnlock u(&mutex_);
|
|
Status s = FlushMemTable(cfd, FlushOptions(), FlushReason::kShutDown);
|
|
s.PermitUncheckedError(); //**TODO: What to do on error?
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
shutting_down_.store(true, std::memory_order_release);
|
|
bg_cv_.SignalAll();
|
|
if (!wait) {
|
|
return;
|
|
}
|
|
WaitForBackgroundWork();
|
|
}
|
|
|
|
Status DBImpl::MaybeReleaseTimestampedSnapshotsAndCheck() {
|
|
size_t num_snapshots = 0;
|
|
ReleaseTimestampedSnapshotsOlderThan(std::numeric_limits<uint64_t>::max(),
|
|
&num_snapshots);
|
|
|
|
// If there is unreleased snapshot, fail the close call
|
|
if (num_snapshots > 0) {
|
|
return Status::Aborted("Cannot close DB with unreleased snapshot.");
|
|
}
|
|
|
|
return Status::OK();
|
|
}
|
|
|
|
Status DBImpl::CloseHelper() {
|
|
// Guarantee that there is no background error recovery in progress before
|
|
// continuing with the shutdown
|
|
mutex_.Lock();
|
|
shutdown_initiated_ = true;
|
|
error_handler_.CancelErrorRecovery();
|
|
while (error_handler_.IsRecoveryInProgress()) {
|
|
bg_cv_.Wait();
|
|
}
|
|
mutex_.Unlock();
|
|
|
|
// Below check is added as recovery_error_ is not checked and it causes crash
|
|
// in DBSSTTest.DBWithMaxSpaceAllowedWithBlobFiles when space limit is
|
|
// reached.
|
|
error_handler_.GetRecoveryError().PermitUncheckedError();
|
|
|
|
// CancelAllBackgroundWork called with false means we just set the shutdown
|
|
// marker. After this we do a variant of the waiting and unschedule work
|
|
// (to consider: moving all the waiting into CancelAllBackgroundWork(true))
|
|
CancelAllBackgroundWork(false);
|
|
|
|
// Cancel manual compaction if there's any
|
|
if (HasPendingManualCompaction()) {
|
|
DisableManualCompaction();
|
|
}
|
|
mutex_.Lock();
|
|
// Unschedule all tasks for this DB
|
|
for (uint8_t i = 0; i < static_cast<uint8_t>(TaskType::kCount); i++) {
|
|
env_->UnSchedule(GetTaskTag(i), Env::Priority::BOTTOM);
|
|
env_->UnSchedule(GetTaskTag(i), Env::Priority::LOW);
|
|
env_->UnSchedule(GetTaskTag(i), Env::Priority::HIGH);
|
|
}
|
|
|
|
Status ret = Status::OK();
|
|
|
|
// Wait for background work to finish
|
|
while (bg_bottom_compaction_scheduled_ || bg_compaction_scheduled_ ||
|
|
bg_flush_scheduled_ || bg_purge_scheduled_ ||
|
|
pending_purge_obsolete_files_ ||
|
|
error_handler_.IsRecoveryInProgress()) {
|
|
TEST_SYNC_POINT("DBImpl::~DBImpl:WaitJob");
|
|
bg_cv_.Wait();
|
|
}
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::CloseHelper:PendingPurgeFinished",
|
|
&files_grabbed_for_purge_);
|
|
EraseThreadStatusDbInfo();
|
|
flush_scheduler_.Clear();
|
|
trim_history_scheduler_.Clear();
|
|
|
|
while (!flush_queue_.empty()) {
|
|
const FlushRequest& flush_req = PopFirstFromFlushQueue();
|
|
for (const auto& iter : flush_req) {
|
|
iter.first->UnrefAndTryDelete();
|
|
}
|
|
}
|
|
|
|
while (!compaction_queue_.empty()) {
|
|
auto cfd = PopFirstFromCompactionQueue();
|
|
cfd->UnrefAndTryDelete();
|
|
}
|
|
|
|
if (default_cf_handle_ != nullptr || persist_stats_cf_handle_ != nullptr) {
|
|
// we need to delete handle outside of lock because it does its own locking
|
|
mutex_.Unlock();
|
|
if (default_cf_handle_) {
|
|
delete default_cf_handle_;
|
|
default_cf_handle_ = nullptr;
|
|
}
|
|
if (persist_stats_cf_handle_) {
|
|
delete persist_stats_cf_handle_;
|
|
persist_stats_cf_handle_ = nullptr;
|
|
}
|
|
mutex_.Lock();
|
|
}
|
|
|
|
// Clean up obsolete files due to SuperVersion release.
|
|
// (1) Need to delete to obsolete files before closing because RepairDB()
|
|
// scans all existing files in the file system and builds manifest file.
|
|
// Keeping obsolete files confuses the repair process.
|
|
// (2) Need to check if we Open()/Recover() the DB successfully before
|
|
// deleting because if VersionSet recover fails (may be due to corrupted
|
|
// manifest file), it is not able to identify live files correctly. As a
|
|
// result, all "live" files can get deleted by accident. However, corrupted
|
|
// manifest is recoverable by RepairDB().
|
|
if (opened_successfully_) {
|
|
JobContext job_context(next_job_id_.fetch_add(1));
|
|
FindObsoleteFiles(&job_context, true);
|
|
|
|
mutex_.Unlock();
|
|
// manifest number starting from 2
|
|
job_context.manifest_file_number = 1;
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
mutex_.Lock();
|
|
}
|
|
{
|
|
InstrumentedMutexLock lock(&log_write_mutex_);
|
|
for (auto l : logs_to_free_) {
|
|
delete l;
|
|
}
|
|
for (auto& log : logs_) {
|
|
uint64_t log_number = log.writer->get_log_number();
|
|
Status s = log.ClearWriter();
|
|
if (!s.ok()) {
|
|
ROCKS_LOG_WARN(
|
|
immutable_db_options_.info_log,
|
|
"Unable to Sync WAL file %s with error -- %s",
|
|
LogFileName(immutable_db_options_.GetWalDir(), log_number).c_str(),
|
|
s.ToString().c_str());
|
|
// Retain the first error
|
|
if (ret.ok()) {
|
|
ret = s;
|
|
}
|
|
}
|
|
}
|
|
logs_.clear();
|
|
}
|
|
|
|
// Table cache may have table handles holding blocks from the block cache.
|
|
// We need to release them before the block cache is destroyed. The block
|
|
// cache may be destroyed inside versions_.reset(), when column family data
|
|
// list is destroyed, so leaving handles in table cache after
|
|
// versions_.reset() may cause issues.
|
|
// Here we clean all unreferenced handles in table cache.
|
|
// Now we assume all user queries have finished, so only version set itself
|
|
// can possibly hold the blocks from block cache. After releasing unreferenced
|
|
// handles here, only handles held by version set left and inside
|
|
// versions_.reset(), we will release them. There, we need to make sure every
|
|
// time a handle is released, we erase it from the cache too. By doing that,
|
|
// we can guarantee that after versions_.reset(), table cache is empty
|
|
// so the cache can be safely destroyed.
|
|
table_cache_->EraseUnRefEntries();
|
|
|
|
for (auto& txn_entry : recovered_transactions_) {
|
|
delete txn_entry.second;
|
|
}
|
|
|
|
// versions need to be destroyed before table_cache since it can hold
|
|
// references to table_cache.
|
|
versions_.reset();
|
|
mutex_.Unlock();
|
|
if (db_lock_ != nullptr) {
|
|
// TODO: Check for unlock error
|
|
env_->UnlockFile(db_lock_).PermitUncheckedError();
|
|
}
|
|
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "Shutdown complete");
|
|
LogFlush(immutable_db_options_.info_log);
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
// If the sst_file_manager was allocated by us during DB::Open(), ccall
|
|
// Close() on it before closing the info_log. Otherwise, background thread
|
|
// in SstFileManagerImpl might try to log something
|
|
if (immutable_db_options_.sst_file_manager && own_sfm_) {
|
|
auto sfm = static_cast<SstFileManagerImpl*>(
|
|
immutable_db_options_.sst_file_manager.get());
|
|
sfm->Close();
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
if (immutable_db_options_.info_log && own_info_log_) {
|
|
Status s = immutable_db_options_.info_log->Close();
|
|
if (!s.ok() && !s.IsNotSupported() && ret.ok()) {
|
|
ret = s;
|
|
}
|
|
}
|
|
|
|
if (write_buffer_manager_ && wbm_stall_) {
|
|
write_buffer_manager_->RemoveDBFromQueue(wbm_stall_.get());
|
|
}
|
|
|
|
IOStatus io_s = directories_.Close(IOOptions(), nullptr /* dbg */);
|
|
if (!io_s.ok()) {
|
|
ret = io_s;
|
|
}
|
|
if (ret.IsAborted()) {
|
|
// Reserve IsAborted() error for those where users didn't release
|
|
// certain resource and they can release them and come back and
|
|
// retry. In this case, we wrap this exception to something else.
|
|
return Status::Incomplete(ret.ToString());
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
Status DBImpl::CloseImpl() { return CloseHelper(); }
|
|
|
|
DBImpl::~DBImpl() {
|
|
// TODO: remove this.
|
|
init_logger_creation_s_.PermitUncheckedError();
|
|
|
|
InstrumentedMutexLock closing_lock_guard(&closing_mutex_);
|
|
if (closed_) {
|
|
return;
|
|
}
|
|
|
|
closed_ = true;
|
|
|
|
{
|
|
const Status s = MaybeReleaseTimestampedSnapshotsAndCheck();
|
|
s.PermitUncheckedError();
|
|
}
|
|
|
|
closing_status_ = CloseImpl();
|
|
closing_status_.PermitUncheckedError();
|
|
}
|
|
|
|
void DBImpl::MaybeIgnoreError(Status* s) const {
|
|
if (s->ok() || immutable_db_options_.paranoid_checks) {
|
|
// No change needed
|
|
} else {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log, "Ignoring error %s",
|
|
s->ToString().c_str());
|
|
*s = Status::OK();
|
|
}
|
|
}
|
|
|
|
const Status DBImpl::CreateArchivalDirectory() {
|
|
if (immutable_db_options_.WAL_ttl_seconds > 0 ||
|
|
immutable_db_options_.WAL_size_limit_MB > 0) {
|
|
std::string archivalPath =
|
|
ArchivalDirectory(immutable_db_options_.GetWalDir());
|
|
return env_->CreateDirIfMissing(archivalPath);
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
void DBImpl::PrintStatistics() {
|
|
auto dbstats = immutable_db_options_.stats;
|
|
if (dbstats) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "STATISTICS:\n %s",
|
|
dbstats->ToString().c_str());
|
|
}
|
|
}
|
|
|
|
Status DBImpl::StartPeriodicTaskScheduler() {
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
#ifndef NDEBUG
|
|
// It only used by test to disable scheduler
|
|
bool disable_scheduler = false;
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"DBImpl::StartPeriodicTaskScheduler:DisableScheduler",
|
|
&disable_scheduler);
|
|
if (disable_scheduler) {
|
|
return Status::OK();
|
|
}
|
|
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::StartPeriodicTaskScheduler:Init",
|
|
&periodic_task_scheduler_);
|
|
}
|
|
|
|
#endif // !NDEBUG
|
|
if (mutable_db_options_.stats_dump_period_sec > 0) {
|
|
Status s = periodic_task_scheduler_.Register(
|
|
PeriodicTaskType::kDumpStats,
|
|
periodic_task_functions_.at(PeriodicTaskType::kDumpStats),
|
|
mutable_db_options_.stats_dump_period_sec);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
if (mutable_db_options_.stats_persist_period_sec > 0) {
|
|
Status s = periodic_task_scheduler_.Register(
|
|
PeriodicTaskType::kPersistStats,
|
|
periodic_task_functions_.at(PeriodicTaskType::kPersistStats),
|
|
mutable_db_options_.stats_persist_period_sec);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
|
|
Status s = periodic_task_scheduler_.Register(
|
|
PeriodicTaskType::kFlushInfoLog,
|
|
periodic_task_functions_.at(PeriodicTaskType::kFlushInfoLog));
|
|
|
|
return s;
|
|
#else
|
|
return Status::OK();
|
|
#endif // !ROCKSDB_LITE
|
|
}
|
|
|
|
Status DBImpl::RegisterRecordSeqnoTimeWorker() {
|
|
#ifndef ROCKSDB_LITE
|
|
uint64_t min_time_duration = std::numeric_limits<uint64_t>::max();
|
|
uint64_t max_time_duration = std::numeric_limits<uint64_t>::min();
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
// preserve time is the max of 2 options.
|
|
uint64_t preserve_time_duration =
|
|
std::max(cfd->ioptions()->preserve_internal_time_seconds,
|
|
cfd->ioptions()->preclude_last_level_data_seconds);
|
|
if (!cfd->IsDropped() && preserve_time_duration > 0) {
|
|
min_time_duration = std::min(preserve_time_duration, min_time_duration);
|
|
max_time_duration = std::max(preserve_time_duration, max_time_duration);
|
|
}
|
|
}
|
|
if (min_time_duration == std::numeric_limits<uint64_t>::max()) {
|
|
seqno_time_mapping_.Resize(0, 0);
|
|
} else {
|
|
seqno_time_mapping_.Resize(min_time_duration, max_time_duration);
|
|
}
|
|
}
|
|
|
|
uint64_t seqno_time_cadence = 0;
|
|
if (min_time_duration != std::numeric_limits<uint64_t>::max()) {
|
|
// round up to 1 when the time_duration is smaller than
|
|
// kMaxSeqnoTimePairsPerCF
|
|
seqno_time_cadence =
|
|
(min_time_duration + SeqnoToTimeMapping::kMaxSeqnoTimePairsPerCF - 1) /
|
|
SeqnoToTimeMapping::kMaxSeqnoTimePairsPerCF;
|
|
}
|
|
|
|
Status s;
|
|
if (seqno_time_cadence == 0) {
|
|
s = periodic_task_scheduler_.Unregister(PeriodicTaskType::kRecordSeqnoTime);
|
|
} else {
|
|
s = periodic_task_scheduler_.Register(
|
|
PeriodicTaskType::kRecordSeqnoTime,
|
|
periodic_task_functions_.at(PeriodicTaskType::kRecordSeqnoTime),
|
|
seqno_time_cadence);
|
|
}
|
|
|
|
return s;
|
|
#else
|
|
return Status::OK();
|
|
#endif // !ROCKSDB_LITE
|
|
}
|
|
|
|
// esitmate the total size of stats_history_
|
|
size_t DBImpl::EstimateInMemoryStatsHistorySize() const {
|
|
size_t size_total =
|
|
sizeof(std::map<uint64_t, std::map<std::string, uint64_t>>);
|
|
if (stats_history_.size() == 0) return size_total;
|
|
size_t size_per_slice =
|
|
sizeof(uint64_t) + sizeof(std::map<std::string, uint64_t>);
|
|
// non-empty map, stats_history_.begin() guaranteed to exist
|
|
for (const auto& pairs : stats_history_.begin()->second) {
|
|
size_per_slice +=
|
|
pairs.first.capacity() + sizeof(pairs.first) + sizeof(pairs.second);
|
|
}
|
|
size_total = size_per_slice * stats_history_.size();
|
|
return size_total;
|
|
}
|
|
|
|
void DBImpl::PersistStats() {
|
|
TEST_SYNC_POINT("DBImpl::PersistStats:Entry");
|
|
#ifndef ROCKSDB_LITE
|
|
if (shutdown_initiated_) {
|
|
return;
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::PersistStats:StartRunning");
|
|
uint64_t now_seconds =
|
|
immutable_db_options_.clock->NowMicros() / kMicrosInSecond;
|
|
|
|
Statistics* statistics = immutable_db_options_.stats;
|
|
if (!statistics) {
|
|
return;
|
|
}
|
|
size_t stats_history_size_limit = 0;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
stats_history_size_limit = mutable_db_options_.stats_history_buffer_size;
|
|
}
|
|
|
|
std::map<std::string, uint64_t> stats_map;
|
|
if (!statistics->getTickerMap(&stats_map)) {
|
|
return;
|
|
}
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"------- PERSISTING STATS -------");
|
|
|
|
if (immutable_db_options_.persist_stats_to_disk) {
|
|
WriteBatch batch;
|
|
Status s = Status::OK();
|
|
if (stats_slice_initialized_) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Reading %" ROCKSDB_PRIszt " stats from statistics\n",
|
|
stats_slice_.size());
|
|
for (const auto& stat : stats_map) {
|
|
if (s.ok()) {
|
|
char key[100];
|
|
int length =
|
|
EncodePersistentStatsKey(now_seconds, stat.first, 100, key);
|
|
// calculate the delta from last time
|
|
if (stats_slice_.find(stat.first) != stats_slice_.end()) {
|
|
uint64_t delta = stat.second - stats_slice_[stat.first];
|
|
s = batch.Put(persist_stats_cf_handle_,
|
|
Slice(key, std::min(100, length)),
|
|
std::to_string(delta));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
stats_slice_initialized_ = true;
|
|
std::swap(stats_slice_, stats_map);
|
|
if (s.ok()) {
|
|
WriteOptions wo;
|
|
wo.low_pri = true;
|
|
wo.no_slowdown = true;
|
|
wo.sync = false;
|
|
s = Write(wo, &batch);
|
|
}
|
|
if (!s.ok()) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Writing to persistent stats CF failed -- %s",
|
|
s.ToString().c_str());
|
|
} else {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Writing %" ROCKSDB_PRIszt " stats with timestamp %" PRIu64
|
|
" to persistent stats CF succeeded",
|
|
stats_slice_.size(), now_seconds);
|
|
}
|
|
// TODO(Zhongyi): add purging for persisted data
|
|
} else {
|
|
InstrumentedMutexLock l(&stats_history_mutex_);
|
|
// calculate the delta from last time
|
|
if (stats_slice_initialized_) {
|
|
std::map<std::string, uint64_t> stats_delta;
|
|
for (const auto& stat : stats_map) {
|
|
if (stats_slice_.find(stat.first) != stats_slice_.end()) {
|
|
stats_delta[stat.first] = stat.second - stats_slice_[stat.first];
|
|
}
|
|
}
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Storing %" ROCKSDB_PRIszt " stats with timestamp %" PRIu64
|
|
" to in-memory stats history",
|
|
stats_slice_.size(), now_seconds);
|
|
stats_history_[now_seconds] = stats_delta;
|
|
}
|
|
stats_slice_initialized_ = true;
|
|
std::swap(stats_slice_, stats_map);
|
|
TEST_SYNC_POINT("DBImpl::PersistStats:StatsCopied");
|
|
|
|
// delete older stats snapshots to control memory consumption
|
|
size_t stats_history_size = EstimateInMemoryStatsHistorySize();
|
|
bool purge_needed = stats_history_size > stats_history_size_limit;
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[Pre-GC] In-memory stats history size: %" ROCKSDB_PRIszt
|
|
" bytes, slice count: %" ROCKSDB_PRIszt,
|
|
stats_history_size, stats_history_.size());
|
|
while (purge_needed && !stats_history_.empty()) {
|
|
stats_history_.erase(stats_history_.begin());
|
|
purge_needed =
|
|
EstimateInMemoryStatsHistorySize() > stats_history_size_limit;
|
|
}
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[Post-GC] In-memory stats history size: %" ROCKSDB_PRIszt
|
|
" bytes, slice count: %" ROCKSDB_PRIszt,
|
|
stats_history_size, stats_history_.size());
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::PersistStats:End");
|
|
#endif // !ROCKSDB_LITE
|
|
}
|
|
|
|
bool DBImpl::FindStatsByTime(uint64_t start_time, uint64_t end_time,
|
|
uint64_t* new_time,
|
|
std::map<std::string, uint64_t>* stats_map) {
|
|
assert(new_time);
|
|
assert(stats_map);
|
|
if (!new_time || !stats_map) return false;
|
|
// lock when search for start_time
|
|
{
|
|
InstrumentedMutexLock l(&stats_history_mutex_);
|
|
auto it = stats_history_.lower_bound(start_time);
|
|
if (it != stats_history_.end() && it->first < end_time) {
|
|
// make a copy for timestamp and stats_map
|
|
*new_time = it->first;
|
|
*stats_map = it->second;
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
Status DBImpl::GetStatsHistory(
|
|
uint64_t start_time, uint64_t end_time,
|
|
std::unique_ptr<StatsHistoryIterator>* stats_iterator) {
|
|
if (!stats_iterator) {
|
|
return Status::InvalidArgument("stats_iterator not preallocated.");
|
|
}
|
|
if (immutable_db_options_.persist_stats_to_disk) {
|
|
stats_iterator->reset(
|
|
new PersistentStatsHistoryIterator(start_time, end_time, this));
|
|
} else {
|
|
stats_iterator->reset(
|
|
new InMemoryStatsHistoryIterator(start_time, end_time, this));
|
|
}
|
|
return (*stats_iterator)->status();
|
|
}
|
|
|
|
void DBImpl::DumpStats() {
|
|
TEST_SYNC_POINT("DBImpl::DumpStats:1");
|
|
#ifndef ROCKSDB_LITE
|
|
std::string stats;
|
|
if (shutdown_initiated_) {
|
|
return;
|
|
}
|
|
|
|
TEST_SYNC_POINT("DBImpl::DumpStats:StartRunning");
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
for (auto cfd : versions_->GetRefedColumnFamilySet()) {
|
|
if (cfd->initialized()) {
|
|
// Release DB mutex for gathering cache entry stats. Pass over all
|
|
// column families for this first so that other stats are dumped
|
|
// near-atomically.
|
|
InstrumentedMutexUnlock u(&mutex_);
|
|
cfd->internal_stats()->CollectCacheEntryStats(/*foreground=*/false);
|
|
}
|
|
}
|
|
|
|
const std::string* property = &DB::Properties::kDBStats;
|
|
const DBPropertyInfo* property_info = GetPropertyInfo(*property);
|
|
assert(property_info != nullptr);
|
|
assert(!property_info->need_out_of_mutex);
|
|
default_cf_internal_stats_->GetStringProperty(*property_info, *property,
|
|
&stats);
|
|
|
|
property = &InternalStats::kPeriodicCFStats;
|
|
property_info = GetPropertyInfo(*property);
|
|
assert(property_info != nullptr);
|
|
assert(!property_info->need_out_of_mutex);
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
if (cfd->initialized()) {
|
|
cfd->internal_stats()->GetStringProperty(*property_info, *property,
|
|
&stats);
|
|
}
|
|
}
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::DumpStats:2");
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"------- DUMPING STATS -------");
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "%s", stats.c_str());
|
|
if (immutable_db_options_.dump_malloc_stats) {
|
|
stats.clear();
|
|
DumpMallocStats(&stats);
|
|
if (!stats.empty()) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"------- Malloc STATS -------");
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "%s", stats.c_str());
|
|
}
|
|
}
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
PrintStatistics();
|
|
}
|
|
|
|
// Periodically flush info log out of application buffer at a low frequency.
|
|
// This improves debuggability in case of RocksDB hanging since it ensures the
|
|
// log messages leading up to the hang will eventually become visible in the
|
|
// log.
|
|
void DBImpl::FlushInfoLog() {
|
|
if (shutdown_initiated_) {
|
|
return;
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::FlushInfoLog:StartRunning");
|
|
LogFlush(immutable_db_options_.info_log);
|
|
}
|
|
|
|
Status DBImpl::TablesRangeTombstoneSummary(ColumnFamilyHandle* column_family,
|
|
int max_entries_to_print,
|
|
std::string* out_str) {
|
|
auto* cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
ColumnFamilyData* cfd = cfh->cfd();
|
|
|
|
SuperVersion* super_version = cfd->GetReferencedSuperVersion(this);
|
|
Version* version = super_version->current;
|
|
|
|
Status s =
|
|
version->TablesRangeTombstoneSummary(max_entries_to_print, out_str);
|
|
|
|
CleanupSuperVersion(super_version);
|
|
return s;
|
|
}
|
|
|
|
void DBImpl::ScheduleBgLogWriterClose(JobContext* job_context) {
|
|
mutex_.AssertHeld();
|
|
if (!job_context->logs_to_free.empty()) {
|
|
for (auto l : job_context->logs_to_free) {
|
|
AddToLogsToFreeQueue(l);
|
|
}
|
|
job_context->logs_to_free.clear();
|
|
}
|
|
}
|
|
|
|
FSDirectory* DBImpl::GetDataDir(ColumnFamilyData* cfd, size_t path_id) const {
|
|
assert(cfd);
|
|
FSDirectory* ret_dir = cfd->GetDataDir(path_id);
|
|
if (ret_dir == nullptr) {
|
|
return directories_.GetDataDir(path_id);
|
|
}
|
|
return ret_dir;
|
|
}
|
|
|
|
Status DBImpl::SetOptions(
|
|
ColumnFamilyHandle* column_family,
|
|
const std::unordered_map<std::string, std::string>& options_map) {
|
|
#ifdef ROCKSDB_LITE
|
|
(void)column_family;
|
|
(void)options_map;
|
|
return Status::NotSupported("Not supported in ROCKSDB LITE");
|
|
#else
|
|
auto* cfd =
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(column_family)->cfd();
|
|
if (options_map.empty()) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"SetOptions() on column family [%s], empty input",
|
|
cfd->GetName().c_str());
|
|
return Status::InvalidArgument("empty input");
|
|
}
|
|
|
|
MutableCFOptions new_options;
|
|
Status s;
|
|
Status persist_options_status;
|
|
SuperVersionContext sv_context(/* create_superversion */ true);
|
|
{
|
|
auto db_options = GetDBOptions();
|
|
InstrumentedMutexLock l(&mutex_);
|
|
s = cfd->SetOptions(db_options, options_map);
|
|
if (s.ok()) {
|
|
new_options = *cfd->GetLatestMutableCFOptions();
|
|
// Append new version to recompute compaction score.
|
|
VersionEdit dummy_edit;
|
|
s = versions_->LogAndApply(cfd, new_options, &dummy_edit, &mutex_,
|
|
directories_.GetDbDir());
|
|
// Trigger possible flush/compactions. This has to be before we persist
|
|
// options to file, otherwise there will be a deadlock with writer
|
|
// thread.
|
|
InstallSuperVersionAndScheduleWork(cfd, &sv_context, new_options);
|
|
|
|
persist_options_status = WriteOptionsFile(
|
|
false /*need_mutex_lock*/, true /*need_enter_write_thread*/);
|
|
bg_cv_.SignalAll();
|
|
}
|
|
}
|
|
sv_context.Clean();
|
|
|
|
ROCKS_LOG_INFO(
|
|
immutable_db_options_.info_log,
|
|
"SetOptions() on column family [%s], inputs:", cfd->GetName().c_str());
|
|
for (const auto& o : options_map) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "%s: %s\n", o.first.c_str(),
|
|
o.second.c_str());
|
|
}
|
|
if (s.ok()) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"[%s] SetOptions() succeeded", cfd->GetName().c_str());
|
|
new_options.Dump(immutable_db_options_.info_log.get());
|
|
if (!persist_options_status.ok()) {
|
|
// NOTE: WriteOptionsFile already logs on failure
|
|
s = persist_options_status;
|
|
}
|
|
} else {
|
|
persist_options_status.PermitUncheckedError(); // less important
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log, "[%s] SetOptions() failed",
|
|
cfd->GetName().c_str());
|
|
}
|
|
LogFlush(immutable_db_options_.info_log);
|
|
return s;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
Status DBImpl::SetDBOptions(
|
|
const std::unordered_map<std::string, std::string>& options_map) {
|
|
#ifdef ROCKSDB_LITE
|
|
(void)options_map;
|
|
return Status::NotSupported("Not supported in ROCKSDB LITE");
|
|
#else
|
|
if (options_map.empty()) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"SetDBOptions(), empty input.");
|
|
return Status::InvalidArgument("empty input");
|
|
}
|
|
|
|
MutableDBOptions new_options;
|
|
Status s;
|
|
Status persist_options_status = Status::OK();
|
|
bool wal_changed = false;
|
|
WriteContext write_context;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
s = GetMutableDBOptionsFromStrings(mutable_db_options_, options_map,
|
|
&new_options);
|
|
|
|
if (new_options.bytes_per_sync == 0) {
|
|
new_options.bytes_per_sync = 1024 * 1024;
|
|
}
|
|
|
|
if (MutableDBOptionsAreEqual(mutable_db_options_, new_options)) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"SetDBOptions(), input option value is not changed, "
|
|
"skipping updating.");
|
|
persist_options_status.PermitUncheckedError();
|
|
return s;
|
|
}
|
|
|
|
DBOptions new_db_options =
|
|
BuildDBOptions(immutable_db_options_, new_options);
|
|
if (s.ok()) {
|
|
s = ValidateOptions(new_db_options);
|
|
}
|
|
if (s.ok()) {
|
|
for (auto c : *versions_->GetColumnFamilySet()) {
|
|
if (!c->IsDropped()) {
|
|
auto cf_options = c->GetLatestCFOptions();
|
|
s = ColumnFamilyData::ValidateOptions(new_db_options, cf_options);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
const BGJobLimits current_bg_job_limits =
|
|
GetBGJobLimits(mutable_db_options_.max_background_flushes,
|
|
mutable_db_options_.max_background_compactions,
|
|
mutable_db_options_.max_background_jobs,
|
|
/* parallelize_compactions */ true);
|
|
const BGJobLimits new_bg_job_limits = GetBGJobLimits(
|
|
new_options.max_background_flushes,
|
|
new_options.max_background_compactions,
|
|
new_options.max_background_jobs, /* parallelize_compactions */ true);
|
|
|
|
const bool max_flushes_increased =
|
|
new_bg_job_limits.max_flushes > current_bg_job_limits.max_flushes;
|
|
const bool max_compactions_increased =
|
|
new_bg_job_limits.max_compactions >
|
|
current_bg_job_limits.max_compactions;
|
|
|
|
if (max_flushes_increased || max_compactions_increased) {
|
|
if (max_flushes_increased) {
|
|
env_->IncBackgroundThreadsIfNeeded(new_bg_job_limits.max_flushes,
|
|
Env::Priority::HIGH);
|
|
}
|
|
|
|
if (max_compactions_increased) {
|
|
env_->IncBackgroundThreadsIfNeeded(new_bg_job_limits.max_compactions,
|
|
Env::Priority::LOW);
|
|
}
|
|
|
|
MaybeScheduleFlushOrCompaction();
|
|
}
|
|
|
|
mutex_.Unlock();
|
|
if (new_options.stats_dump_period_sec == 0) {
|
|
s = periodic_task_scheduler_.Unregister(PeriodicTaskType::kDumpStats);
|
|
} else {
|
|
s = periodic_task_scheduler_.Register(
|
|
PeriodicTaskType::kDumpStats,
|
|
periodic_task_functions_.at(PeriodicTaskType::kDumpStats),
|
|
new_options.stats_dump_period_sec);
|
|
}
|
|
if (new_options.max_total_wal_size !=
|
|
mutable_db_options_.max_total_wal_size) {
|
|
max_total_wal_size_.store(new_options.max_total_wal_size,
|
|
std::memory_order_release);
|
|
}
|
|
if (s.ok()) {
|
|
if (new_options.stats_persist_period_sec == 0) {
|
|
s = periodic_task_scheduler_.Unregister(
|
|
PeriodicTaskType::kPersistStats);
|
|
} else {
|
|
s = periodic_task_scheduler_.Register(
|
|
PeriodicTaskType::kPersistStats,
|
|
periodic_task_functions_.at(PeriodicTaskType::kPersistStats),
|
|
new_options.stats_persist_period_sec);
|
|
}
|
|
}
|
|
mutex_.Lock();
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
write_controller_.set_max_delayed_write_rate(
|
|
new_options.delayed_write_rate);
|
|
table_cache_.get()->SetCapacity(new_options.max_open_files == -1
|
|
? TableCache::kInfiniteCapacity
|
|
: new_options.max_open_files - 10);
|
|
wal_changed = mutable_db_options_.wal_bytes_per_sync !=
|
|
new_options.wal_bytes_per_sync;
|
|
mutable_db_options_ = new_options;
|
|
file_options_for_compaction_ = FileOptions(new_db_options);
|
|
file_options_for_compaction_ = fs_->OptimizeForCompactionTableWrite(
|
|
file_options_for_compaction_, immutable_db_options_);
|
|
versions_->ChangeFileOptions(mutable_db_options_);
|
|
// TODO(xiez): clarify why apply optimize for read to write options
|
|
file_options_for_compaction_ = fs_->OptimizeForCompactionTableRead(
|
|
file_options_for_compaction_, immutable_db_options_);
|
|
file_options_for_compaction_.compaction_readahead_size =
|
|
mutable_db_options_.compaction_readahead_size;
|
|
WriteThread::Writer w;
|
|
write_thread_.EnterUnbatched(&w, &mutex_);
|
|
if (total_log_size_ > GetMaxTotalWalSize() || wal_changed) {
|
|
Status purge_wal_status = SwitchWAL(&write_context);
|
|
if (!purge_wal_status.ok()) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"Unable to purge WAL files in SetDBOptions() -- %s",
|
|
purge_wal_status.ToString().c_str());
|
|
}
|
|
}
|
|
persist_options_status = WriteOptionsFile(
|
|
false /*need_mutex_lock*/, false /*need_enter_write_thread*/);
|
|
write_thread_.ExitUnbatched(&w);
|
|
} else {
|
|
// To get here, we must have had invalid options and will not attempt to
|
|
// persist the options, which means the status is "OK/Uninitialized.
|
|
persist_options_status.PermitUncheckedError();
|
|
}
|
|
}
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "SetDBOptions(), inputs:");
|
|
for (const auto& o : options_map) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "%s: %s\n", o.first.c_str(),
|
|
o.second.c_str());
|
|
}
|
|
if (s.ok()) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log, "SetDBOptions() succeeded");
|
|
new_options.Dump(immutable_db_options_.info_log.get());
|
|
if (!persist_options_status.ok()) {
|
|
if (immutable_db_options_.fail_if_options_file_error) {
|
|
s = Status::IOError(
|
|
"SetDBOptions() succeeded, but unable to persist options",
|
|
persist_options_status.ToString());
|
|
}
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"Unable to persist options in SetDBOptions() -- %s",
|
|
persist_options_status.ToString().c_str());
|
|
}
|
|
} else {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log, "SetDBOptions failed");
|
|
}
|
|
LogFlush(immutable_db_options_.info_log);
|
|
return s;
|
|
#endif // ROCKSDB_LITE
|
|
}
|
|
|
|
// return the same level if it cannot be moved
|
|
int DBImpl::FindMinimumEmptyLevelFitting(
|
|
ColumnFamilyData* cfd, const MutableCFOptions& /*mutable_cf_options*/,
|
|
int level) {
|
|
mutex_.AssertHeld();
|
|
const auto* vstorage = cfd->current()->storage_info();
|
|
int minimum_level = level;
|
|
for (int i = level - 1; i > 0; --i) {
|
|
// stop if level i is not empty
|
|
if (vstorage->NumLevelFiles(i) > 0) break;
|
|
// stop if level i is too small (cannot fit the level files)
|
|
if (vstorage->MaxBytesForLevel(i) < vstorage->NumLevelBytes(level)) {
|
|
break;
|
|
}
|
|
|
|
minimum_level = i;
|
|
}
|
|
return minimum_level;
|
|
}
|
|
|
|
Status DBImpl::FlushWAL(bool sync) {
|
|
if (manual_wal_flush_) {
|
|
IOStatus io_s;
|
|
{
|
|
// We need to lock log_write_mutex_ since logs_ might change concurrently
|
|
InstrumentedMutexLock wl(&log_write_mutex_);
|
|
log::Writer* cur_log_writer = logs_.back().writer;
|
|
io_s = cur_log_writer->WriteBuffer();
|
|
}
|
|
if (!io_s.ok()) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log, "WAL flush error %s",
|
|
io_s.ToString().c_str());
|
|
// In case there is a fs error we should set it globally to prevent the
|
|
// future writes
|
|
IOStatusCheck(io_s);
|
|
// whether sync or not, we should abort the rest of function upon error
|
|
return static_cast<Status>(io_s);
|
|
}
|
|
if (!sync) {
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log, "FlushWAL sync=false");
|
|
return static_cast<Status>(io_s);
|
|
}
|
|
}
|
|
if (!sync) {
|
|
return Status::OK();
|
|
}
|
|
// sync = true
|
|
ROCKS_LOG_DEBUG(immutable_db_options_.info_log, "FlushWAL sync=true");
|
|
return SyncWAL();
|
|
}
|
|
|
|
bool DBImpl::WALBufferIsEmpty(bool lock) {
|
|
if (lock) {
|
|
log_write_mutex_.Lock();
|
|
}
|
|
log::Writer* cur_log_writer = logs_.back().writer;
|
|
auto res = cur_log_writer->BufferIsEmpty();
|
|
if (lock) {
|
|
log_write_mutex_.Unlock();
|
|
}
|
|
return res;
|
|
}
|
|
|
|
Status DBImpl::SyncWAL() {
|
|
TEST_SYNC_POINT("DBImpl::SyncWAL:Begin");
|
|
autovector<log::Writer*, 1> logs_to_sync;
|
|
bool need_log_dir_sync;
|
|
uint64_t current_log_number;
|
|
|
|
{
|
|
InstrumentedMutexLock l(&log_write_mutex_);
|
|
assert(!logs_.empty());
|
|
|
|
// This SyncWAL() call only cares about logs up to this number.
|
|
current_log_number = logfile_number_;
|
|
|
|
while (logs_.front().number <= current_log_number &&
|
|
logs_.front().IsSyncing()) {
|
|
log_sync_cv_.Wait();
|
|
}
|
|
// First check that logs are safe to sync in background.
|
|
for (auto it = logs_.begin();
|
|
it != logs_.end() && it->number <= current_log_number; ++it) {
|
|
if (!it->writer->file()->writable_file()->IsSyncThreadSafe()) {
|
|
return Status::NotSupported(
|
|
"SyncWAL() is not supported for this implementation of WAL file",
|
|
immutable_db_options_.allow_mmap_writes
|
|
? "try setting Options::allow_mmap_writes to false"
|
|
: Slice());
|
|
}
|
|
}
|
|
for (auto it = logs_.begin();
|
|
it != logs_.end() && it->number <= current_log_number; ++it) {
|
|
auto& log = *it;
|
|
log.PrepareForSync();
|
|
logs_to_sync.push_back(log.writer);
|
|
}
|
|
|
|
need_log_dir_sync = !log_dir_synced_;
|
|
}
|
|
|
|
TEST_SYNC_POINT("DBWALTest::SyncWALNotWaitWrite:1");
|
|
RecordTick(stats_, WAL_FILE_SYNCED);
|
|
Status status;
|
|
IOStatus io_s;
|
|
for (log::Writer* log : logs_to_sync) {
|
|
io_s = log->file()->SyncWithoutFlush(immutable_db_options_.use_fsync);
|
|
if (!io_s.ok()) {
|
|
status = io_s;
|
|
break;
|
|
}
|
|
}
|
|
if (!io_s.ok()) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log, "WAL Sync error %s",
|
|
io_s.ToString().c_str());
|
|
// In case there is a fs error we should set it globally to prevent the
|
|
// future writes
|
|
IOStatusCheck(io_s);
|
|
}
|
|
if (status.ok() && need_log_dir_sync) {
|
|
status = directories_.GetWalDir()->FsyncWithDirOptions(
|
|
IOOptions(), nullptr,
|
|
DirFsyncOptions(DirFsyncOptions::FsyncReason::kNewFileSynced));
|
|
}
|
|
TEST_SYNC_POINT("DBWALTest::SyncWALNotWaitWrite:2");
|
|
|
|
TEST_SYNC_POINT("DBImpl::SyncWAL:BeforeMarkLogsSynced:1");
|
|
VersionEdit synced_wals;
|
|
{
|
|
InstrumentedMutexLock l(&log_write_mutex_);
|
|
if (status.ok()) {
|
|
MarkLogsSynced(current_log_number, need_log_dir_sync, &synced_wals);
|
|
} else {
|
|
MarkLogsNotSynced(current_log_number);
|
|
}
|
|
}
|
|
if (status.ok() && synced_wals.IsWalAddition()) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
status = ApplyWALToManifest(&synced_wals);
|
|
}
|
|
|
|
TEST_SYNC_POINT("DBImpl::SyncWAL:BeforeMarkLogsSynced:2");
|
|
|
|
return status;
|
|
}
|
|
|
|
Status DBImpl::ApplyWALToManifest(VersionEdit* synced_wals) {
|
|
// not empty, write to MANIFEST.
|
|
mutex_.AssertHeld();
|
|
Status status = versions_->LogAndApplyToDefaultColumnFamily(
|
|
synced_wals, &mutex_, directories_.GetDbDir());
|
|
if (!status.ok() && versions_->io_status().IsIOError()) {
|
|
status = error_handler_.SetBGError(versions_->io_status(),
|
|
BackgroundErrorReason::kManifestWrite);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
Status DBImpl::LockWAL() {
|
|
log_write_mutex_.Lock();
|
|
auto cur_log_writer = logs_.back().writer;
|
|
IOStatus status = cur_log_writer->WriteBuffer();
|
|
if (!status.ok()) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log, "WAL flush error %s",
|
|
status.ToString().c_str());
|
|
// In case there is a fs error we should set it globally to prevent the
|
|
// future writes
|
|
WriteStatusCheck(status);
|
|
}
|
|
return static_cast<Status>(status);
|
|
}
|
|
|
|
Status DBImpl::UnlockWAL() {
|
|
log_write_mutex_.Unlock();
|
|
return Status::OK();
|
|
}
|
|
|
|
void DBImpl::MarkLogsSynced(uint64_t up_to, bool synced_dir,
|
|
VersionEdit* synced_wals) {
|
|
log_write_mutex_.AssertHeld();
|
|
if (synced_dir && logfile_number_ == up_to) {
|
|
log_dir_synced_ = true;
|
|
}
|
|
for (auto it = logs_.begin(); it != logs_.end() && it->number <= up_to;) {
|
|
auto& wal = *it;
|
|
assert(wal.IsSyncing());
|
|
|
|
if (wal.number < logs_.back().number) {
|
|
// Inactive WAL
|
|
if (immutable_db_options_.track_and_verify_wals_in_manifest &&
|
|
wal.GetPreSyncSize() > 0) {
|
|
synced_wals->AddWal(wal.number, WalMetadata(wal.GetPreSyncSize()));
|
|
}
|
|
if (wal.GetPreSyncSize() == wal.writer->file()->GetFlushedSize()) {
|
|
// Fully synced
|
|
logs_to_free_.push_back(wal.ReleaseWriter());
|
|
it = logs_.erase(it);
|
|
} else {
|
|
assert(wal.GetPreSyncSize() < wal.writer->file()->GetFlushedSize());
|
|
wal.FinishSync();
|
|
++it;
|
|
}
|
|
} else {
|
|
assert(wal.number == logs_.back().number);
|
|
// Active WAL
|
|
wal.FinishSync();
|
|
++it;
|
|
}
|
|
}
|
|
log_sync_cv_.SignalAll();
|
|
}
|
|
|
|
void DBImpl::MarkLogsNotSynced(uint64_t up_to) {
|
|
log_write_mutex_.AssertHeld();
|
|
for (auto it = logs_.begin(); it != logs_.end() && it->number <= up_to;
|
|
++it) {
|
|
auto& wal = *it;
|
|
wal.FinishSync();
|
|
}
|
|
log_sync_cv_.SignalAll();
|
|
}
|
|
|
|
SequenceNumber DBImpl::GetLatestSequenceNumber() const {
|
|
return versions_->LastSequence();
|
|
}
|
|
|
|
void DBImpl::SetLastPublishedSequence(SequenceNumber seq) {
|
|
versions_->SetLastPublishedSequence(seq);
|
|
}
|
|
|
|
Status DBImpl::GetFullHistoryTsLow(ColumnFamilyHandle* column_family,
|
|
std::string* ts_low) {
|
|
if (ts_low == nullptr) {
|
|
return Status::InvalidArgument("ts_low is nullptr");
|
|
}
|
|
ColumnFamilyData* cfd = nullptr;
|
|
if (column_family == nullptr) {
|
|
cfd = default_cf_handle_->cfd();
|
|
} else {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
assert(cfh != nullptr);
|
|
cfd = cfh->cfd();
|
|
}
|
|
assert(cfd != nullptr && cfd->user_comparator() != nullptr);
|
|
if (cfd->user_comparator()->timestamp_size() == 0) {
|
|
return Status::InvalidArgument(
|
|
"Timestamp is not enabled in this column family");
|
|
}
|
|
InstrumentedMutexLock l(&mutex_);
|
|
*ts_low = cfd->GetFullHistoryTsLow();
|
|
assert(cfd->user_comparator()->timestamp_size() == ts_low->size());
|
|
return Status::OK();
|
|
}
|
|
|
|
InternalIterator* DBImpl::NewInternalIterator(const ReadOptions& read_options,
|
|
Arena* arena,
|
|
SequenceNumber sequence,
|
|
ColumnFamilyHandle* column_family,
|
|
bool allow_unprepared_value) {
|
|
ColumnFamilyData* cfd;
|
|
if (column_family == nullptr) {
|
|
cfd = default_cf_handle_->cfd();
|
|
} else {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
cfd = cfh->cfd();
|
|
}
|
|
|
|
mutex_.Lock();
|
|
SuperVersion* super_version = cfd->GetSuperVersion()->Ref();
|
|
mutex_.Unlock();
|
|
return NewInternalIterator(read_options, cfd, super_version, arena, sequence,
|
|
allow_unprepared_value);
|
|
}
|
|
|
|
void DBImpl::SchedulePurge() {
|
|
mutex_.AssertHeld();
|
|
assert(opened_successfully_);
|
|
|
|
// Purge operations are put into High priority queue
|
|
bg_purge_scheduled_++;
|
|
env_->Schedule(&DBImpl::BGWorkPurge, this, Env::Priority::HIGH, nullptr);
|
|
}
|
|
|
|
void DBImpl::BackgroundCallPurge() {
|
|
mutex_.Lock();
|
|
|
|
while (!logs_to_free_queue_.empty()) {
|
|
assert(!logs_to_free_queue_.empty());
|
|
log::Writer* log_writer = *(logs_to_free_queue_.begin());
|
|
logs_to_free_queue_.pop_front();
|
|
mutex_.Unlock();
|
|
delete log_writer;
|
|
mutex_.Lock();
|
|
}
|
|
while (!superversions_to_free_queue_.empty()) {
|
|
assert(!superversions_to_free_queue_.empty());
|
|
SuperVersion* sv = superversions_to_free_queue_.front();
|
|
superversions_to_free_queue_.pop_front();
|
|
mutex_.Unlock();
|
|
delete sv;
|
|
mutex_.Lock();
|
|
}
|
|
|
|
assert(bg_purge_scheduled_ > 0);
|
|
|
|
// Can't use iterator to go over purge_files_ because inside the loop we're
|
|
// unlocking the mutex that protects purge_files_.
|
|
while (!purge_files_.empty()) {
|
|
auto it = purge_files_.begin();
|
|
// Need to make a copy of the PurgeFilesInfo before unlocking the mutex.
|
|
PurgeFileInfo purge_file = it->second;
|
|
|
|
const std::string& fname = purge_file.fname;
|
|
const std::string& dir_to_sync = purge_file.dir_to_sync;
|
|
FileType type = purge_file.type;
|
|
uint64_t number = purge_file.number;
|
|
int job_id = purge_file.job_id;
|
|
|
|
purge_files_.erase(it);
|
|
|
|
mutex_.Unlock();
|
|
DeleteObsoleteFileImpl(job_id, fname, dir_to_sync, type, number);
|
|
mutex_.Lock();
|
|
}
|
|
|
|
bg_purge_scheduled_--;
|
|
|
|
bg_cv_.SignalAll();
|
|
// IMPORTANT:there should be no code after calling SignalAll. This call may
|
|
// signal the DB destructor that it's OK to proceed with destruction. In
|
|
// that case, all DB variables will be dealloacated and referencing them
|
|
// will cause trouble.
|
|
mutex_.Unlock();
|
|
}
|
|
|
|
namespace {
|
|
|
|
// A `SuperVersionHandle` holds a non-null `SuperVersion*` pointing at a
|
|
// `SuperVersion` referenced once for this object. It also contains the state
|
|
// needed to clean up the `SuperVersion` reference from outside of `DBImpl`
|
|
// using `CleanupSuperVersionHandle()`.
|
|
struct SuperVersionHandle {
|
|
// `_super_version` must be non-nullptr and `Ref()`'d once as long as the
|
|
// `SuperVersionHandle` may use it.
|
|
SuperVersionHandle(DBImpl* _db, InstrumentedMutex* _mu,
|
|
SuperVersion* _super_version, bool _background_purge)
|
|
: db(_db),
|
|
mu(_mu),
|
|
super_version(_super_version),
|
|
background_purge(_background_purge) {}
|
|
|
|
DBImpl* db;
|
|
InstrumentedMutex* mu;
|
|
SuperVersion* super_version;
|
|
bool background_purge;
|
|
};
|
|
|
|
static void CleanupSuperVersionHandle(void* arg1, void* /*arg2*/) {
|
|
SuperVersionHandle* sv_handle = reinterpret_cast<SuperVersionHandle*>(arg1);
|
|
|
|
if (sv_handle->super_version->Unref()) {
|
|
// Job id == 0 means that this is not our background process, but rather
|
|
// user thread
|
|
JobContext job_context(0);
|
|
|
|
sv_handle->mu->Lock();
|
|
sv_handle->super_version->Cleanup();
|
|
sv_handle->db->FindObsoleteFiles(&job_context, false, true);
|
|
if (sv_handle->background_purge) {
|
|
sv_handle->db->ScheduleBgLogWriterClose(&job_context);
|
|
sv_handle->db->AddSuperVersionsToFreeQueue(sv_handle->super_version);
|
|
sv_handle->db->SchedulePurge();
|
|
}
|
|
sv_handle->mu->Unlock();
|
|
|
|
if (!sv_handle->background_purge) {
|
|
delete sv_handle->super_version;
|
|
}
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
sv_handle->db->PurgeObsoleteFiles(job_context,
|
|
sv_handle->background_purge);
|
|
}
|
|
job_context.Clean();
|
|
}
|
|
|
|
delete sv_handle;
|
|
}
|
|
|
|
struct GetMergeOperandsState {
|
|
MergeContext merge_context;
|
|
PinnedIteratorsManager pinned_iters_mgr;
|
|
SuperVersionHandle* sv_handle;
|
|
};
|
|
|
|
static void CleanupGetMergeOperandsState(void* arg1, void* /*arg2*/) {
|
|
GetMergeOperandsState* state = static_cast<GetMergeOperandsState*>(arg1);
|
|
CleanupSuperVersionHandle(state->sv_handle /* arg1 */, nullptr /* arg2 */);
|
|
delete state;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
InternalIterator* DBImpl::NewInternalIterator(
|
|
const ReadOptions& read_options, ColumnFamilyData* cfd,
|
|
SuperVersion* super_version, Arena* arena, SequenceNumber sequence,
|
|
bool allow_unprepared_value, ArenaWrappedDBIter* db_iter) {
|
|
InternalIterator* internal_iter;
|
|
assert(arena != nullptr);
|
|
// Need to create internal iterator from the arena.
|
|
MergeIteratorBuilder merge_iter_builder(
|
|
&cfd->internal_comparator(), arena,
|
|
!read_options.total_order_seek &&
|
|
super_version->mutable_cf_options.prefix_extractor != nullptr);
|
|
// Collect iterator for mutable memtable
|
|
auto mem_iter = super_version->mem->NewIterator(read_options, arena);
|
|
Status s;
|
|
if (!read_options.ignore_range_deletions) {
|
|
TruncatedRangeDelIterator* mem_tombstone_iter = nullptr;
|
|
auto range_del_iter = super_version->mem->NewRangeTombstoneIterator(
|
|
read_options, sequence, false /* immutable_memtable */);
|
|
if (range_del_iter == nullptr || range_del_iter->empty()) {
|
|
delete range_del_iter;
|
|
} else {
|
|
mem_tombstone_iter = new TruncatedRangeDelIterator(
|
|
std::unique_ptr<FragmentedRangeTombstoneIterator>(range_del_iter),
|
|
&cfd->ioptions()->internal_comparator, nullptr /* smallest */,
|
|
nullptr /* largest */);
|
|
}
|
|
merge_iter_builder.AddPointAndTombstoneIterator(mem_iter,
|
|
mem_tombstone_iter);
|
|
} else {
|
|
merge_iter_builder.AddIterator(mem_iter);
|
|
}
|
|
|
|
// Collect all needed child iterators for immutable memtables
|
|
if (s.ok()) {
|
|
super_version->imm->AddIterators(read_options, &merge_iter_builder,
|
|
!read_options.ignore_range_deletions);
|
|
}
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::NewInternalIterator:StatusCallback", &s);
|
|
if (s.ok()) {
|
|
// Collect iterators for files in L0 - Ln
|
|
if (read_options.read_tier != kMemtableTier) {
|
|
super_version->current->AddIterators(read_options, file_options_,
|
|
&merge_iter_builder,
|
|
allow_unprepared_value);
|
|
}
|
|
internal_iter = merge_iter_builder.Finish(
|
|
read_options.ignore_range_deletions ? nullptr : db_iter);
|
|
SuperVersionHandle* cleanup = new SuperVersionHandle(
|
|
this, &mutex_, super_version,
|
|
read_options.background_purge_on_iterator_cleanup ||
|
|
immutable_db_options_.avoid_unnecessary_blocking_io);
|
|
internal_iter->RegisterCleanup(CleanupSuperVersionHandle, cleanup, nullptr);
|
|
|
|
return internal_iter;
|
|
} else {
|
|
CleanupSuperVersion(super_version);
|
|
}
|
|
return NewErrorInternalIterator<Slice>(s, arena);
|
|
}
|
|
|
|
ColumnFamilyHandle* DBImpl::DefaultColumnFamily() const {
|
|
return default_cf_handle_;
|
|
}
|
|
|
|
ColumnFamilyHandle* DBImpl::PersistentStatsColumnFamily() const {
|
|
return persist_stats_cf_handle_;
|
|
}
|
|
|
|
Status DBImpl::Get(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const Slice& key,
|
|
PinnableSlice* value) {
|
|
return Get(read_options, column_family, key, value, /*timestamp=*/nullptr);
|
|
}
|
|
|
|
Status DBImpl::Get(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const Slice& key,
|
|
PinnableSlice* value, std::string* timestamp) {
|
|
assert(value != nullptr);
|
|
value->Reset();
|
|
GetImplOptions get_impl_options;
|
|
get_impl_options.column_family = column_family;
|
|
get_impl_options.value = value;
|
|
get_impl_options.timestamp = timestamp;
|
|
Status s = GetImpl(read_options, key, get_impl_options);
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::GetEntity(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const Slice& key,
|
|
PinnableWideColumns* columns) {
|
|
if (!column_family) {
|
|
return Status::InvalidArgument(
|
|
"Cannot call GetEntity without a column family handle");
|
|
}
|
|
|
|
if (!columns) {
|
|
return Status::InvalidArgument(
|
|
"Cannot call GetEntity without a PinnableWideColumns object");
|
|
}
|
|
|
|
columns->Reset();
|
|
|
|
GetImplOptions get_impl_options;
|
|
get_impl_options.column_family = column_family;
|
|
get_impl_options.columns = columns;
|
|
|
|
return GetImpl(read_options, key, get_impl_options);
|
|
}
|
|
|
|
bool DBImpl::ShouldReferenceSuperVersion(const MergeContext& merge_context) {
|
|
// If both thresholds are reached, a function returning merge operands as
|
|
// `PinnableSlice`s should reference the `SuperVersion` to avoid large and/or
|
|
// numerous `memcpy()`s.
|
|
//
|
|
// The below constants enable the optimization conservatively. They are
|
|
// verified to not regress `GetMergeOperands()` latency in the following
|
|
// scenarios.
|
|
//
|
|
// - CPU: two socket Intel(R) Xeon(R) Gold 6138 CPU @ 2.00GHz
|
|
// - `GetMergeOperands()` threads: 1 - 32
|
|
// - Entry size: 32 bytes - 4KB
|
|
// - Merges per key: 1 - 16K
|
|
// - LSM component: memtable
|
|
//
|
|
// TODO(ajkr): expand measurement to SST files.
|
|
static const size_t kNumBytesForSvRef = 32768;
|
|
static const size_t kLog2AvgBytesForSvRef = 8; // 256 bytes
|
|
|
|
size_t num_bytes = 0;
|
|
for (const Slice& sl : merge_context.GetOperands()) {
|
|
num_bytes += sl.size();
|
|
}
|
|
return num_bytes >= kNumBytesForSvRef &&
|
|
(num_bytes >> kLog2AvgBytesForSvRef) >=
|
|
merge_context.GetOperands().size();
|
|
}
|
|
|
|
Status DBImpl::GetImpl(const ReadOptions& read_options, const Slice& key,
|
|
GetImplOptions& get_impl_options) {
|
|
assert(get_impl_options.value != nullptr ||
|
|
get_impl_options.merge_operands != nullptr ||
|
|
get_impl_options.columns != nullptr);
|
|
|
|
assert(get_impl_options.column_family);
|
|
|
|
if (read_options.timestamp) {
|
|
const Status s = FailIfTsMismatchCf(get_impl_options.column_family,
|
|
*(read_options.timestamp),
|
|
/*ts_for_read=*/true);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
} else {
|
|
const Status s = FailIfCfHasTs(get_impl_options.column_family);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
|
|
// Clear the timestamps for returning results so that we can distinguish
|
|
// between tombstone or key that has never been written
|
|
if (get_impl_options.timestamp) {
|
|
get_impl_options.timestamp->clear();
|
|
}
|
|
|
|
GetWithTimestampReadCallback read_cb(0); // Will call Refresh
|
|
|
|
PERF_CPU_TIMER_GUARD(get_cpu_nanos, immutable_db_options_.clock);
|
|
StopWatch sw(immutable_db_options_.clock, stats_, DB_GET);
|
|
PERF_TIMER_GUARD(get_snapshot_time);
|
|
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(
|
|
get_impl_options.column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
if (tracer_) {
|
|
// TODO: This mutex should be removed later, to improve performance when
|
|
// tracing is enabled.
|
|
InstrumentedMutexLock lock(&trace_mutex_);
|
|
if (tracer_) {
|
|
// TODO: maybe handle the tracing status?
|
|
tracer_->Get(get_impl_options.column_family, key).PermitUncheckedError();
|
|
}
|
|
}
|
|
|
|
if (get_impl_options.get_merge_operands_options != nullptr) {
|
|
for (int i = 0; i < get_impl_options.get_merge_operands_options
|
|
->expected_max_number_of_operands;
|
|
++i) {
|
|
get_impl_options.merge_operands[i].Reset();
|
|
}
|
|
}
|
|
|
|
// Acquire SuperVersion
|
|
SuperVersion* sv = GetAndRefSuperVersion(cfd);
|
|
|
|
TEST_SYNC_POINT("DBImpl::GetImpl:1");
|
|
TEST_SYNC_POINT("DBImpl::GetImpl:2");
|
|
|
|
SequenceNumber snapshot;
|
|
if (read_options.snapshot != nullptr) {
|
|
if (get_impl_options.callback) {
|
|
// Already calculated based on read_options.snapshot
|
|
snapshot = get_impl_options.callback->max_visible_seq();
|
|
} else {
|
|
snapshot =
|
|
reinterpret_cast<const SnapshotImpl*>(read_options.snapshot)->number_;
|
|
}
|
|
} else {
|
|
// Note that the snapshot is assigned AFTER referencing the super
|
|
// version because otherwise a flush happening in between may compact away
|
|
// data for the snapshot, so the reader would see neither data that was be
|
|
// visible to the snapshot before compaction nor the newer data inserted
|
|
// afterwards.
|
|
snapshot = GetLastPublishedSequence();
|
|
if (get_impl_options.callback) {
|
|
// The unprep_seqs are not published for write unprepared, so it could be
|
|
// that max_visible_seq is larger. Seek to the std::max of the two.
|
|
// However, we still want our callback to contain the actual snapshot so
|
|
// that it can do the correct visibility filtering.
|
|
get_impl_options.callback->Refresh(snapshot);
|
|
|
|
// Internally, WriteUnpreparedTxnReadCallback::Refresh would set
|
|
// max_visible_seq = max(max_visible_seq, snapshot)
|
|
//
|
|
// Currently, the commented out assert is broken by
|
|
// InvalidSnapshotReadCallback, but if write unprepared recovery followed
|
|
// the regular transaction flow, then this special read callback would not
|
|
// be needed.
|
|
//
|
|
// assert(callback->max_visible_seq() >= snapshot);
|
|
snapshot = get_impl_options.callback->max_visible_seq();
|
|
}
|
|
}
|
|
// If timestamp is used, we use read callback to ensure <key,t,s> is returned
|
|
// only if t <= read_opts.timestamp and s <= snapshot.
|
|
// HACK: temporarily overwrite input struct field but restore
|
|
SaveAndRestore<ReadCallback*> restore_callback(&get_impl_options.callback);
|
|
const Comparator* ucmp = get_impl_options.column_family->GetComparator();
|
|
assert(ucmp);
|
|
if (ucmp->timestamp_size() > 0) {
|
|
assert(!get_impl_options
|
|
.callback); // timestamp with callback is not supported
|
|
read_cb.Refresh(snapshot);
|
|
get_impl_options.callback = &read_cb;
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::GetImpl:3");
|
|
TEST_SYNC_POINT("DBImpl::GetImpl:4");
|
|
|
|
// Prepare to store a list of merge operations if merge occurs.
|
|
MergeContext merge_context;
|
|
SequenceNumber max_covering_tombstone_seq = 0;
|
|
|
|
Status s;
|
|
// First look in the memtable, then in the immutable memtable (if any).
|
|
// s is both in/out. When in, s could either be OK or MergeInProgress.
|
|
// merge_operands will contain the sequence of merges in the latter case.
|
|
LookupKey lkey(key, snapshot, read_options.timestamp);
|
|
PERF_TIMER_STOP(get_snapshot_time);
|
|
|
|
bool skip_memtable = (read_options.read_tier == kPersistedTier &&
|
|
has_unpersisted_data_.load(std::memory_order_relaxed));
|
|
bool done = false;
|
|
std::string* timestamp =
|
|
ucmp->timestamp_size() > 0 ? get_impl_options.timestamp : nullptr;
|
|
if (!skip_memtable) {
|
|
// Get value associated with key
|
|
if (get_impl_options.get_value) {
|
|
if (sv->mem->Get(
|
|
lkey,
|
|
get_impl_options.value ? get_impl_options.value->GetSelf()
|
|
: nullptr,
|
|
get_impl_options.columns, timestamp, &s, &merge_context,
|
|
&max_covering_tombstone_seq, read_options,
|
|
false /* immutable_memtable */, get_impl_options.callback,
|
|
get_impl_options.is_blob_index)) {
|
|
done = true;
|
|
|
|
if (get_impl_options.value) {
|
|
get_impl_options.value->PinSelf();
|
|
}
|
|
|
|
RecordTick(stats_, MEMTABLE_HIT);
|
|
} else if ((s.ok() || s.IsMergeInProgress()) &&
|
|
sv->imm->Get(lkey,
|
|
get_impl_options.value
|
|
? get_impl_options.value->GetSelf()
|
|
: nullptr,
|
|
get_impl_options.columns, timestamp, &s,
|
|
&merge_context, &max_covering_tombstone_seq,
|
|
read_options, get_impl_options.callback,
|
|
get_impl_options.is_blob_index)) {
|
|
done = true;
|
|
|
|
if (get_impl_options.value) {
|
|
get_impl_options.value->PinSelf();
|
|
}
|
|
|
|
RecordTick(stats_, MEMTABLE_HIT);
|
|
}
|
|
} else {
|
|
// Get Merge Operands associated with key, Merge Operands should not be
|
|
// merged and raw values should be returned to the user.
|
|
if (sv->mem->Get(lkey, /*value=*/nullptr, /*columns=*/nullptr,
|
|
/*timestamp=*/nullptr, &s, &merge_context,
|
|
&max_covering_tombstone_seq, read_options,
|
|
false /* immutable_memtable */, nullptr, nullptr,
|
|
false)) {
|
|
done = true;
|
|
RecordTick(stats_, MEMTABLE_HIT);
|
|
} else if ((s.ok() || s.IsMergeInProgress()) &&
|
|
sv->imm->GetMergeOperands(lkey, &s, &merge_context,
|
|
&max_covering_tombstone_seq,
|
|
read_options)) {
|
|
done = true;
|
|
RecordTick(stats_, MEMTABLE_HIT);
|
|
}
|
|
}
|
|
if (!done && !s.ok() && !s.IsMergeInProgress()) {
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
return s;
|
|
}
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::GetImpl:PostMemTableGet:0");
|
|
TEST_SYNC_POINT("DBImpl::GetImpl:PostMemTableGet:1");
|
|
PinnedIteratorsManager pinned_iters_mgr;
|
|
if (!done) {
|
|
PERF_TIMER_GUARD(get_from_output_files_time);
|
|
sv->current->Get(
|
|
read_options, lkey, get_impl_options.value, get_impl_options.columns,
|
|
timestamp, &s, &merge_context, &max_covering_tombstone_seq,
|
|
&pinned_iters_mgr,
|
|
get_impl_options.get_value ? get_impl_options.value_found : nullptr,
|
|
nullptr, nullptr,
|
|
get_impl_options.get_value ? get_impl_options.callback : nullptr,
|
|
get_impl_options.get_value ? get_impl_options.is_blob_index : nullptr,
|
|
get_impl_options.get_value);
|
|
RecordTick(stats_, MEMTABLE_MISS);
|
|
}
|
|
|
|
{
|
|
PERF_TIMER_GUARD(get_post_process_time);
|
|
|
|
RecordTick(stats_, NUMBER_KEYS_READ);
|
|
size_t size = 0;
|
|
if (s.ok()) {
|
|
if (get_impl_options.get_value) {
|
|
if (get_impl_options.value) {
|
|
size = get_impl_options.value->size();
|
|
} else if (get_impl_options.columns) {
|
|
size = get_impl_options.columns->serialized_size();
|
|
}
|
|
} else {
|
|
// Return all merge operands for get_impl_options.key
|
|
*get_impl_options.number_of_operands =
|
|
static_cast<int>(merge_context.GetNumOperands());
|
|
if (*get_impl_options.number_of_operands >
|
|
get_impl_options.get_merge_operands_options
|
|
->expected_max_number_of_operands) {
|
|
s = Status::Incomplete(
|
|
Status::SubCode::KMergeOperandsInsufficientCapacity);
|
|
} else {
|
|
// Each operand depends on one of the following resources: `sv`,
|
|
// `pinned_iters_mgr`, or `merge_context`. It would be crazy expensive
|
|
// to reference `sv` for each operand relying on it because `sv` is
|
|
// (un)ref'd in all threads using the DB. Furthermore, we do not track
|
|
// on which resource each operand depends.
|
|
//
|
|
// To solve this, we bundle the resources in a `GetMergeOperandsState`
|
|
// and manage them with a `SharedCleanablePtr` shared among the
|
|
// `PinnableSlice`s we return. This bundle includes one `sv` reference
|
|
// and ownership of the `merge_context` and `pinned_iters_mgr`
|
|
// objects.
|
|
bool ref_sv = ShouldReferenceSuperVersion(merge_context);
|
|
if (ref_sv) {
|
|
assert(!merge_context.GetOperands().empty());
|
|
SharedCleanablePtr shared_cleanable;
|
|
GetMergeOperandsState* state = nullptr;
|
|
state = new GetMergeOperandsState();
|
|
state->merge_context = std::move(merge_context);
|
|
state->pinned_iters_mgr = std::move(pinned_iters_mgr);
|
|
|
|
sv->Ref();
|
|
|
|
state->sv_handle = new SuperVersionHandle(
|
|
this, &mutex_, sv,
|
|
immutable_db_options_.avoid_unnecessary_blocking_io);
|
|
|
|
shared_cleanable.Allocate();
|
|
shared_cleanable->RegisterCleanup(CleanupGetMergeOperandsState,
|
|
state /* arg1 */,
|
|
nullptr /* arg2 */);
|
|
for (size_t i = 0; i < state->merge_context.GetOperands().size();
|
|
++i) {
|
|
const Slice& sl = state->merge_context.GetOperands()[i];
|
|
size += sl.size();
|
|
|
|
get_impl_options.merge_operands->PinSlice(
|
|
sl, nullptr /* cleanable */);
|
|
if (i == state->merge_context.GetOperands().size() - 1) {
|
|
shared_cleanable.MoveAsCleanupTo(
|
|
get_impl_options.merge_operands);
|
|
} else {
|
|
shared_cleanable.RegisterCopyWith(
|
|
get_impl_options.merge_operands);
|
|
}
|
|
get_impl_options.merge_operands++;
|
|
}
|
|
} else {
|
|
for (const Slice& sl : merge_context.GetOperands()) {
|
|
size += sl.size();
|
|
get_impl_options.merge_operands->PinSelf(sl);
|
|
get_impl_options.merge_operands++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
RecordTick(stats_, BYTES_READ, size);
|
|
PERF_COUNTER_ADD(get_read_bytes, size);
|
|
}
|
|
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
|
|
RecordInHistogram(stats_, BYTES_PER_READ, size);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
std::vector<Status> DBImpl::MultiGet(
|
|
const ReadOptions& read_options,
|
|
const std::vector<ColumnFamilyHandle*>& column_family,
|
|
const std::vector<Slice>& keys, std::vector<std::string>* values) {
|
|
return MultiGet(read_options, column_family, keys, values,
|
|
/*timestamps=*/nullptr);
|
|
}
|
|
|
|
std::vector<Status> DBImpl::MultiGet(
|
|
const ReadOptions& read_options,
|
|
const std::vector<ColumnFamilyHandle*>& column_family,
|
|
const std::vector<Slice>& keys, std::vector<std::string>* values,
|
|
std::vector<std::string>* timestamps) {
|
|
PERF_CPU_TIMER_GUARD(get_cpu_nanos, immutable_db_options_.clock);
|
|
StopWatch sw(immutable_db_options_.clock, stats_, DB_MULTIGET);
|
|
PERF_TIMER_GUARD(get_snapshot_time);
|
|
|
|
size_t num_keys = keys.size();
|
|
assert(column_family.size() == num_keys);
|
|
std::vector<Status> stat_list(num_keys);
|
|
|
|
bool should_fail = false;
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
assert(column_family[i]);
|
|
if (read_options.timestamp) {
|
|
stat_list[i] = FailIfTsMismatchCf(
|
|
column_family[i], *(read_options.timestamp), /*ts_for_read=*/true);
|
|
if (!stat_list[i].ok()) {
|
|
should_fail = true;
|
|
}
|
|
} else {
|
|
stat_list[i] = FailIfCfHasTs(column_family[i]);
|
|
if (!stat_list[i].ok()) {
|
|
should_fail = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (should_fail) {
|
|
for (auto& s : stat_list) {
|
|
if (s.ok()) {
|
|
s = Status::Incomplete(
|
|
"DB not queried due to invalid argument(s) in the same MultiGet");
|
|
}
|
|
}
|
|
return stat_list;
|
|
}
|
|
|
|
if (tracer_) {
|
|
// TODO: This mutex should be removed later, to improve performance when
|
|
// tracing is enabled.
|
|
InstrumentedMutexLock lock(&trace_mutex_);
|
|
if (tracer_) {
|
|
// TODO: maybe handle the tracing status?
|
|
tracer_->MultiGet(column_family, keys).PermitUncheckedError();
|
|
}
|
|
}
|
|
|
|
SequenceNumber consistent_seqnum;
|
|
|
|
UnorderedMap<uint32_t, MultiGetColumnFamilyData> multiget_cf_data(
|
|
column_family.size());
|
|
for (auto cf : column_family) {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(cf);
|
|
auto cfd = cfh->cfd();
|
|
if (multiget_cf_data.find(cfd->GetID()) == multiget_cf_data.end()) {
|
|
multiget_cf_data.emplace(cfd->GetID(),
|
|
MultiGetColumnFamilyData(cfh, nullptr));
|
|
}
|
|
}
|
|
|
|
std::function<MultiGetColumnFamilyData*(
|
|
UnorderedMap<uint32_t, MultiGetColumnFamilyData>::iterator&)>
|
|
iter_deref_lambda =
|
|
[](UnorderedMap<uint32_t, MultiGetColumnFamilyData>::iterator&
|
|
cf_iter) { return &cf_iter->second; };
|
|
|
|
bool unref_only =
|
|
MultiCFSnapshot<UnorderedMap<uint32_t, MultiGetColumnFamilyData>>(
|
|
read_options, nullptr, iter_deref_lambda, &multiget_cf_data,
|
|
&consistent_seqnum);
|
|
|
|
TEST_SYNC_POINT("DBImpl::MultiGet:AfterGetSeqNum1");
|
|
TEST_SYNC_POINT("DBImpl::MultiGet:AfterGetSeqNum2");
|
|
|
|
// Contain a list of merge operations if merge occurs.
|
|
MergeContext merge_context;
|
|
|
|
// Note: this always resizes the values array
|
|
values->resize(num_keys);
|
|
if (timestamps) {
|
|
timestamps->resize(num_keys);
|
|
}
|
|
|
|
// Keep track of bytes that we read for statistics-recording later
|
|
uint64_t bytes_read = 0;
|
|
PERF_TIMER_STOP(get_snapshot_time);
|
|
|
|
// For each of the given keys, apply the entire "get" process as follows:
|
|
// First look in the memtable, then in the immutable memtable (if any).
|
|
// s is both in/out. When in, s could either be OK or MergeInProgress.
|
|
// merge_operands will contain the sequence of merges in the latter case.
|
|
size_t num_found = 0;
|
|
size_t keys_read;
|
|
uint64_t curr_value_size = 0;
|
|
|
|
GetWithTimestampReadCallback timestamp_read_callback(0);
|
|
ReadCallback* read_callback = nullptr;
|
|
if (read_options.timestamp && read_options.timestamp->size() > 0) {
|
|
timestamp_read_callback.Refresh(consistent_seqnum);
|
|
read_callback = ×tamp_read_callback;
|
|
}
|
|
|
|
for (keys_read = 0; keys_read < num_keys; ++keys_read) {
|
|
merge_context.Clear();
|
|
Status& s = stat_list[keys_read];
|
|
std::string* value = &(*values)[keys_read];
|
|
std::string* timestamp = timestamps ? &(*timestamps)[keys_read] : nullptr;
|
|
|
|
LookupKey lkey(keys[keys_read], consistent_seqnum, read_options.timestamp);
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(
|
|
column_family[keys_read]);
|
|
SequenceNumber max_covering_tombstone_seq = 0;
|
|
auto mgd_iter = multiget_cf_data.find(cfh->cfd()->GetID());
|
|
assert(mgd_iter != multiget_cf_data.end());
|
|
auto mgd = mgd_iter->second;
|
|
auto super_version = mgd.super_version;
|
|
bool skip_memtable =
|
|
(read_options.read_tier == kPersistedTier &&
|
|
has_unpersisted_data_.load(std::memory_order_relaxed));
|
|
bool done = false;
|
|
if (!skip_memtable) {
|
|
if (super_version->mem->Get(
|
|
lkey, value, /*columns=*/nullptr, timestamp, &s, &merge_context,
|
|
&max_covering_tombstone_seq, read_options,
|
|
false /* immutable_memtable */, read_callback)) {
|
|
done = true;
|
|
RecordTick(stats_, MEMTABLE_HIT);
|
|
} else if (super_version->imm->Get(lkey, value, /*columns=*/nullptr,
|
|
timestamp, &s, &merge_context,
|
|
&max_covering_tombstone_seq,
|
|
read_options, read_callback)) {
|
|
done = true;
|
|
RecordTick(stats_, MEMTABLE_HIT);
|
|
}
|
|
}
|
|
if (!done) {
|
|
PinnableSlice pinnable_val;
|
|
PERF_TIMER_GUARD(get_from_output_files_time);
|
|
PinnedIteratorsManager pinned_iters_mgr;
|
|
super_version->current->Get(read_options, lkey, &pinnable_val,
|
|
/*columns=*/nullptr, timestamp, &s,
|
|
&merge_context, &max_covering_tombstone_seq,
|
|
&pinned_iters_mgr, /*value_found=*/nullptr,
|
|
/*key_exists=*/nullptr,
|
|
/*seq=*/nullptr, read_callback);
|
|
value->assign(pinnable_val.data(), pinnable_val.size());
|
|
RecordTick(stats_, MEMTABLE_MISS);
|
|
}
|
|
|
|
if (s.ok()) {
|
|
bytes_read += value->size();
|
|
num_found++;
|
|
curr_value_size += value->size();
|
|
if (curr_value_size > read_options.value_size_soft_limit) {
|
|
while (++keys_read < num_keys) {
|
|
stat_list[keys_read] = Status::Aborted();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (read_options.deadline.count() &&
|
|
immutable_db_options_.clock->NowMicros() >
|
|
static_cast<uint64_t>(read_options.deadline.count())) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (keys_read < num_keys) {
|
|
// The only reason to break out of the loop is when the deadline is
|
|
// exceeded
|
|
assert(immutable_db_options_.clock->NowMicros() >
|
|
static_cast<uint64_t>(read_options.deadline.count()));
|
|
for (++keys_read; keys_read < num_keys; ++keys_read) {
|
|
stat_list[keys_read] = Status::TimedOut();
|
|
}
|
|
}
|
|
|
|
// Post processing (decrement reference counts and record statistics)
|
|
PERF_TIMER_GUARD(get_post_process_time);
|
|
autovector<SuperVersion*> superversions_to_delete;
|
|
|
|
for (auto mgd_iter : multiget_cf_data) {
|
|
auto mgd = mgd_iter.second;
|
|
if (!unref_only) {
|
|
ReturnAndCleanupSuperVersion(mgd.cfd, mgd.super_version);
|
|
} else {
|
|
mgd.cfd->GetSuperVersion()->Unref();
|
|
}
|
|
}
|
|
RecordTick(stats_, NUMBER_MULTIGET_CALLS);
|
|
RecordTick(stats_, NUMBER_MULTIGET_KEYS_READ, num_keys);
|
|
RecordTick(stats_, NUMBER_MULTIGET_KEYS_FOUND, num_found);
|
|
RecordTick(stats_, NUMBER_MULTIGET_BYTES_READ, bytes_read);
|
|
RecordInHistogram(stats_, BYTES_PER_MULTIGET, bytes_read);
|
|
PERF_COUNTER_ADD(multiget_read_bytes, bytes_read);
|
|
PERF_TIMER_STOP(get_post_process_time);
|
|
|
|
return stat_list;
|
|
}
|
|
|
|
template <class T>
|
|
bool DBImpl::MultiCFSnapshot(
|
|
const ReadOptions& read_options, ReadCallback* callback,
|
|
std::function<MultiGetColumnFamilyData*(typename T::iterator&)>&
|
|
iter_deref_func,
|
|
T* cf_list, SequenceNumber* snapshot) {
|
|
PERF_TIMER_GUARD(get_snapshot_time);
|
|
|
|
bool last_try = false;
|
|
if (cf_list->size() == 1) {
|
|
// Fast path for a single column family. We can simply get the thread loca
|
|
// super version
|
|
auto cf_iter = cf_list->begin();
|
|
auto node = iter_deref_func(cf_iter);
|
|
node->super_version = GetAndRefSuperVersion(node->cfd);
|
|
if (read_options.snapshot != nullptr) {
|
|
// Note: In WritePrepared txns this is not necessary but not harmful
|
|
// either. Because prep_seq > snapshot => commit_seq > snapshot so if
|
|
// a snapshot is specified we should be fine with skipping seq numbers
|
|
// that are greater than that.
|
|
//
|
|
// In WriteUnprepared, we cannot set snapshot in the lookup key because we
|
|
// may skip uncommitted data that should be visible to the transaction for
|
|
// reading own writes.
|
|
*snapshot =
|
|
static_cast<const SnapshotImpl*>(read_options.snapshot)->number_;
|
|
if (callback) {
|
|
*snapshot = std::max(*snapshot, callback->max_visible_seq());
|
|
}
|
|
} else {
|
|
// Since we get and reference the super version before getting
|
|
// the snapshot number, without a mutex protection, it is possible
|
|
// that a memtable switch happened in the middle and not all the
|
|
// data for this snapshot is available. But it will contain all
|
|
// the data available in the super version we have, which is also
|
|
// a valid snapshot to read from.
|
|
// We shouldn't get snapshot before finding and referencing the super
|
|
// version because a flush happening in between may compact away data for
|
|
// the snapshot, but the snapshot is earlier than the data overwriting it,
|
|
// so users may see wrong results.
|
|
*snapshot = GetLastPublishedSequence();
|
|
}
|
|
} else {
|
|
// If we end up with the same issue of memtable geting sealed during 2
|
|
// consecutive retries, it means the write rate is very high. In that case
|
|
// its probably ok to take the mutex on the 3rd try so we can succeed for
|
|
// sure
|
|
constexpr int num_retries = 3;
|
|
for (int i = 0; i < num_retries; ++i) {
|
|
last_try = (i == num_retries - 1);
|
|
bool retry = false;
|
|
|
|
if (i > 0) {
|
|
for (auto cf_iter = cf_list->begin(); cf_iter != cf_list->end();
|
|
++cf_iter) {
|
|
auto node = iter_deref_func(cf_iter);
|
|
SuperVersion* super_version = node->super_version;
|
|
ColumnFamilyData* cfd = node->cfd;
|
|
if (super_version != nullptr) {
|
|
ReturnAndCleanupSuperVersion(cfd, super_version);
|
|
}
|
|
node->super_version = nullptr;
|
|
}
|
|
}
|
|
if (read_options.snapshot == nullptr) {
|
|
if (last_try) {
|
|
TEST_SYNC_POINT("DBImpl::MultiGet::LastTry");
|
|
// We're close to max number of retries. For the last retry,
|
|
// acquire the lock so we're sure to succeed
|
|
mutex_.Lock();
|
|
}
|
|
*snapshot = GetLastPublishedSequence();
|
|
} else {
|
|
*snapshot =
|
|
static_cast_with_check<const SnapshotImpl>(read_options.snapshot)
|
|
->number_;
|
|
}
|
|
for (auto cf_iter = cf_list->begin(); cf_iter != cf_list->end();
|
|
++cf_iter) {
|
|
auto node = iter_deref_func(cf_iter);
|
|
if (!last_try) {
|
|
node->super_version = GetAndRefSuperVersion(node->cfd);
|
|
} else {
|
|
node->super_version = node->cfd->GetSuperVersion()->Ref();
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::MultiGet::AfterRefSV");
|
|
if (read_options.snapshot != nullptr || last_try) {
|
|
// If user passed a snapshot, then we don't care if a memtable is
|
|
// sealed or compaction happens because the snapshot would ensure
|
|
// that older key versions are kept around. If this is the last
|
|
// retry, then we have the lock so nothing bad can happen
|
|
continue;
|
|
}
|
|
// We could get the earliest sequence number for the whole list of
|
|
// memtables, which will include immutable memtables as well, but that
|
|
// might be tricky to maintain in case we decide, in future, to do
|
|
// memtable compaction.
|
|
if (!last_try) {
|
|
SequenceNumber seq =
|
|
node->super_version->mem->GetEarliestSequenceNumber();
|
|
if (seq > *snapshot) {
|
|
retry = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!retry) {
|
|
if (last_try) {
|
|
mutex_.Unlock();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Keep track of bytes that we read for statistics-recording later
|
|
PERF_TIMER_STOP(get_snapshot_time);
|
|
|
|
return last_try;
|
|
}
|
|
|
|
void DBImpl::MultiGet(const ReadOptions& read_options, const size_t num_keys,
|
|
ColumnFamilyHandle** column_families, const Slice* keys,
|
|
PinnableSlice* values, Status* statuses,
|
|
const bool sorted_input) {
|
|
return MultiGet(read_options, num_keys, column_families, keys, values,
|
|
/*timestamps=*/nullptr, statuses, sorted_input);
|
|
}
|
|
|
|
void DBImpl::MultiGet(const ReadOptions& read_options, const size_t num_keys,
|
|
ColumnFamilyHandle** column_families, const Slice* keys,
|
|
PinnableSlice* values, std::string* timestamps,
|
|
Status* statuses, const bool sorted_input) {
|
|
if (num_keys == 0) {
|
|
return;
|
|
}
|
|
|
|
bool should_fail = false;
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
ColumnFamilyHandle* cfh = column_families[i];
|
|
assert(cfh);
|
|
if (read_options.timestamp) {
|
|
statuses[i] = FailIfTsMismatchCf(cfh, *(read_options.timestamp),
|
|
/*ts_for_read=*/true);
|
|
if (!statuses[i].ok()) {
|
|
should_fail = true;
|
|
}
|
|
} else {
|
|
statuses[i] = FailIfCfHasTs(cfh);
|
|
if (!statuses[i].ok()) {
|
|
should_fail = true;
|
|
}
|
|
}
|
|
}
|
|
if (should_fail) {
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
if (statuses[i].ok()) {
|
|
statuses[i] = Status::Incomplete(
|
|
"DB not queried due to invalid argument(s) in the same MultiGet");
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (tracer_) {
|
|
// TODO: This mutex should be removed later, to improve performance when
|
|
// tracing is enabled.
|
|
InstrumentedMutexLock lock(&trace_mutex_);
|
|
if (tracer_) {
|
|
// TODO: maybe handle the tracing status?
|
|
tracer_->MultiGet(num_keys, column_families, keys).PermitUncheckedError();
|
|
}
|
|
}
|
|
|
|
autovector<KeyContext, MultiGetContext::MAX_BATCH_SIZE> key_context;
|
|
autovector<KeyContext*, MultiGetContext::MAX_BATCH_SIZE> sorted_keys;
|
|
sorted_keys.resize(num_keys);
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
values[i].Reset();
|
|
key_context.emplace_back(column_families[i], keys[i], &values[i],
|
|
timestamps ? ×tamps[i] : nullptr,
|
|
&statuses[i]);
|
|
}
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
sorted_keys[i] = &key_context[i];
|
|
}
|
|
PrepareMultiGetKeys(num_keys, sorted_input, &sorted_keys);
|
|
|
|
autovector<MultiGetColumnFamilyData, MultiGetContext::MAX_BATCH_SIZE>
|
|
multiget_cf_data;
|
|
size_t cf_start = 0;
|
|
ColumnFamilyHandle* cf = sorted_keys[0]->column_family;
|
|
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
KeyContext* key_ctx = sorted_keys[i];
|
|
if (key_ctx->column_family != cf) {
|
|
multiget_cf_data.emplace_back(cf, cf_start, i - cf_start, nullptr);
|
|
cf_start = i;
|
|
cf = key_ctx->column_family;
|
|
}
|
|
}
|
|
|
|
multiget_cf_data.emplace_back(cf, cf_start, num_keys - cf_start, nullptr);
|
|
|
|
std::function<MultiGetColumnFamilyData*(
|
|
autovector<MultiGetColumnFamilyData,
|
|
MultiGetContext::MAX_BATCH_SIZE>::iterator&)>
|
|
iter_deref_lambda =
|
|
[](autovector<MultiGetColumnFamilyData,
|
|
MultiGetContext::MAX_BATCH_SIZE>::iterator& cf_iter) {
|
|
return &(*cf_iter);
|
|
};
|
|
|
|
SequenceNumber consistent_seqnum;
|
|
bool unref_only = MultiCFSnapshot<
|
|
autovector<MultiGetColumnFamilyData, MultiGetContext::MAX_BATCH_SIZE>>(
|
|
read_options, nullptr, iter_deref_lambda, &multiget_cf_data,
|
|
&consistent_seqnum);
|
|
|
|
GetWithTimestampReadCallback timestamp_read_callback(0);
|
|
ReadCallback* read_callback = nullptr;
|
|
if (read_options.timestamp && read_options.timestamp->size() > 0) {
|
|
timestamp_read_callback.Refresh(consistent_seqnum);
|
|
read_callback = ×tamp_read_callback;
|
|
}
|
|
|
|
Status s;
|
|
auto cf_iter = multiget_cf_data.begin();
|
|
for (; cf_iter != multiget_cf_data.end(); ++cf_iter) {
|
|
s = MultiGetImpl(read_options, cf_iter->start, cf_iter->num_keys,
|
|
&sorted_keys, cf_iter->super_version, consistent_seqnum,
|
|
read_callback);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
if (!s.ok()) {
|
|
assert(s.IsTimedOut() || s.IsAborted());
|
|
for (++cf_iter; cf_iter != multiget_cf_data.end(); ++cf_iter) {
|
|
for (size_t i = cf_iter->start; i < cf_iter->start + cf_iter->num_keys;
|
|
++i) {
|
|
*sorted_keys[i]->s = s;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (const auto& iter : multiget_cf_data) {
|
|
if (!unref_only) {
|
|
ReturnAndCleanupSuperVersion(iter.cfd, iter.super_version);
|
|
} else {
|
|
iter.cfd->GetSuperVersion()->Unref();
|
|
}
|
|
}
|
|
}
|
|
|
|
namespace {
|
|
// Order keys by CF ID, followed by key contents
|
|
struct CompareKeyContext {
|
|
inline bool operator()(const KeyContext* lhs, const KeyContext* rhs) {
|
|
ColumnFamilyHandleImpl* cfh =
|
|
static_cast<ColumnFamilyHandleImpl*>(lhs->column_family);
|
|
uint32_t cfd_id1 = cfh->cfd()->GetID();
|
|
const Comparator* comparator = cfh->cfd()->user_comparator();
|
|
cfh = static_cast<ColumnFamilyHandleImpl*>(rhs->column_family);
|
|
uint32_t cfd_id2 = cfh->cfd()->GetID();
|
|
|
|
if (cfd_id1 < cfd_id2) {
|
|
return true;
|
|
} else if (cfd_id1 > cfd_id2) {
|
|
return false;
|
|
}
|
|
|
|
// Both keys are from the same column family
|
|
int cmp = comparator->CompareWithoutTimestamp(
|
|
*(lhs->key), /*a_has_ts=*/false, *(rhs->key), /*b_has_ts=*/false);
|
|
if (cmp < 0) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
};
|
|
|
|
} // anonymous namespace
|
|
|
|
void DBImpl::PrepareMultiGetKeys(
|
|
size_t num_keys, bool sorted_input,
|
|
autovector<KeyContext*, MultiGetContext::MAX_BATCH_SIZE>* sorted_keys) {
|
|
if (sorted_input) {
|
|
#ifndef NDEBUG
|
|
assert(std::is_sorted(sorted_keys->begin(), sorted_keys->end(),
|
|
CompareKeyContext()));
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
std::sort(sorted_keys->begin(), sorted_keys->begin() + num_keys,
|
|
CompareKeyContext());
|
|
}
|
|
|
|
void DBImpl::MultiGet(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const size_t num_keys,
|
|
const Slice* keys, PinnableSlice* values,
|
|
Status* statuses, const bool sorted_input) {
|
|
return MultiGet(read_options, column_family, num_keys, keys, values,
|
|
/*timestamp=*/nullptr, statuses, sorted_input);
|
|
}
|
|
|
|
void DBImpl::MultiGet(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const size_t num_keys,
|
|
const Slice* keys, PinnableSlice* values,
|
|
std::string* timestamps, Status* statuses,
|
|
const bool sorted_input) {
|
|
if (tracer_) {
|
|
// TODO: This mutex should be removed later, to improve performance when
|
|
// tracing is enabled.
|
|
InstrumentedMutexLock lock(&trace_mutex_);
|
|
if (tracer_) {
|
|
// TODO: maybe handle the tracing status?
|
|
tracer_->MultiGet(num_keys, column_family, keys).PermitUncheckedError();
|
|
}
|
|
}
|
|
autovector<KeyContext, MultiGetContext::MAX_BATCH_SIZE> key_context;
|
|
autovector<KeyContext*, MultiGetContext::MAX_BATCH_SIZE> sorted_keys;
|
|
sorted_keys.resize(num_keys);
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
values[i].Reset();
|
|
key_context.emplace_back(column_family, keys[i], &values[i],
|
|
timestamps ? ×tamps[i] : nullptr,
|
|
&statuses[i]);
|
|
}
|
|
for (size_t i = 0; i < num_keys; ++i) {
|
|
sorted_keys[i] = &key_context[i];
|
|
}
|
|
PrepareMultiGetKeys(num_keys, sorted_input, &sorted_keys);
|
|
MultiGetWithCallback(read_options, column_family, nullptr, &sorted_keys);
|
|
}
|
|
|
|
void DBImpl::MultiGetWithCallback(
|
|
const ReadOptions& read_options, ColumnFamilyHandle* column_family,
|
|
ReadCallback* callback,
|
|
autovector<KeyContext*, MultiGetContext::MAX_BATCH_SIZE>* sorted_keys) {
|
|
std::array<MultiGetColumnFamilyData, 1> multiget_cf_data;
|
|
multiget_cf_data[0] = MultiGetColumnFamilyData(column_family, nullptr);
|
|
std::function<MultiGetColumnFamilyData*(
|
|
std::array<MultiGetColumnFamilyData, 1>::iterator&)>
|
|
iter_deref_lambda =
|
|
[](std::array<MultiGetColumnFamilyData, 1>::iterator& cf_iter) {
|
|
return &(*cf_iter);
|
|
};
|
|
|
|
size_t num_keys = sorted_keys->size();
|
|
SequenceNumber consistent_seqnum;
|
|
bool unref_only = MultiCFSnapshot<std::array<MultiGetColumnFamilyData, 1>>(
|
|
read_options, callback, iter_deref_lambda, &multiget_cf_data,
|
|
&consistent_seqnum);
|
|
#ifndef NDEBUG
|
|
assert(!unref_only);
|
|
#else
|
|
// Silence unused variable warning
|
|
(void)unref_only;
|
|
#endif // NDEBUG
|
|
|
|
if (callback && read_options.snapshot == nullptr) {
|
|
// The unprep_seqs are not published for write unprepared, so it could be
|
|
// that max_visible_seq is larger. Seek to the std::max of the two.
|
|
// However, we still want our callback to contain the actual snapshot so
|
|
// that it can do the correct visibility filtering.
|
|
callback->Refresh(consistent_seqnum);
|
|
|
|
// Internally, WriteUnpreparedTxnReadCallback::Refresh would set
|
|
// max_visible_seq = max(max_visible_seq, snapshot)
|
|
//
|
|
// Currently, the commented out assert is broken by
|
|
// InvalidSnapshotReadCallback, but if write unprepared recovery followed
|
|
// the regular transaction flow, then this special read callback would not
|
|
// be needed.
|
|
//
|
|
// assert(callback->max_visible_seq() >= snapshot);
|
|
consistent_seqnum = callback->max_visible_seq();
|
|
}
|
|
|
|
GetWithTimestampReadCallback timestamp_read_callback(0);
|
|
ReadCallback* read_callback = callback;
|
|
if (read_options.timestamp && read_options.timestamp->size() > 0) {
|
|
assert(!read_callback); // timestamp with callback is not supported
|
|
timestamp_read_callback.Refresh(consistent_seqnum);
|
|
read_callback = ×tamp_read_callback;
|
|
}
|
|
|
|
Status s = MultiGetImpl(read_options, 0, num_keys, sorted_keys,
|
|
multiget_cf_data[0].super_version, consistent_seqnum,
|
|
read_callback);
|
|
assert(s.ok() || s.IsTimedOut() || s.IsAborted());
|
|
ReturnAndCleanupSuperVersion(multiget_cf_data[0].cfd,
|
|
multiget_cf_data[0].super_version);
|
|
}
|
|
|
|
// The actual implementation of batched MultiGet. Parameters -
|
|
// start_key - Index in the sorted_keys vector to start processing from
|
|
// num_keys - Number of keys to lookup, starting with sorted_keys[start_key]
|
|
// sorted_keys - The entire batch of sorted keys for this CF
|
|
//
|
|
// The per key status is returned in the KeyContext structures pointed to by
|
|
// sorted_keys. An overall Status is also returned, with the only possible
|
|
// values being Status::OK() and Status::TimedOut(). The latter indicates
|
|
// that the call exceeded read_options.deadline
|
|
Status DBImpl::MultiGetImpl(
|
|
const ReadOptions& read_options, size_t start_key, size_t num_keys,
|
|
autovector<KeyContext*, MultiGetContext::MAX_BATCH_SIZE>* sorted_keys,
|
|
SuperVersion* super_version, SequenceNumber snapshot,
|
|
ReadCallback* callback) {
|
|
PERF_CPU_TIMER_GUARD(get_cpu_nanos, immutable_db_options_.clock);
|
|
StopWatch sw(immutable_db_options_.clock, stats_, DB_MULTIGET);
|
|
|
|
assert(sorted_keys);
|
|
// Clear the timestamps for returning results so that we can distinguish
|
|
// between tombstone or key that has never been written
|
|
for (auto* kctx : *sorted_keys) {
|
|
assert(kctx);
|
|
if (kctx->timestamp) {
|
|
kctx->timestamp->clear();
|
|
}
|
|
}
|
|
|
|
// For each of the given keys, apply the entire "get" process as follows:
|
|
// First look in the memtable, then in the immutable memtable (if any).
|
|
// s is both in/out. When in, s could either be OK or MergeInProgress.
|
|
// merge_operands will contain the sequence of merges in the latter case.
|
|
size_t keys_left = num_keys;
|
|
Status s;
|
|
uint64_t curr_value_size = 0;
|
|
while (keys_left) {
|
|
if (read_options.deadline.count() &&
|
|
immutable_db_options_.clock->NowMicros() >
|
|
static_cast<uint64_t>(read_options.deadline.count())) {
|
|
s = Status::TimedOut();
|
|
break;
|
|
}
|
|
|
|
size_t batch_size = (keys_left > MultiGetContext::MAX_BATCH_SIZE)
|
|
? MultiGetContext::MAX_BATCH_SIZE
|
|
: keys_left;
|
|
MultiGetContext ctx(sorted_keys, start_key + num_keys - keys_left,
|
|
batch_size, snapshot, read_options, GetFileSystem(),
|
|
stats_);
|
|
MultiGetRange range = ctx.GetMultiGetRange();
|
|
range.AddValueSize(curr_value_size);
|
|
bool lookup_current = false;
|
|
|
|
keys_left -= batch_size;
|
|
for (auto mget_iter = range.begin(); mget_iter != range.end();
|
|
++mget_iter) {
|
|
mget_iter->merge_context.Clear();
|
|
*mget_iter->s = Status::OK();
|
|
}
|
|
|
|
bool skip_memtable =
|
|
(read_options.read_tier == kPersistedTier &&
|
|
has_unpersisted_data_.load(std::memory_order_relaxed));
|
|
if (!skip_memtable) {
|
|
super_version->mem->MultiGet(read_options, &range, callback,
|
|
false /* immutable_memtable */);
|
|
if (!range.empty()) {
|
|
super_version->imm->MultiGet(read_options, &range, callback);
|
|
}
|
|
if (!range.empty()) {
|
|
lookup_current = true;
|
|
uint64_t left = range.KeysLeft();
|
|
RecordTick(stats_, MEMTABLE_MISS, left);
|
|
}
|
|
}
|
|
if (lookup_current) {
|
|
PERF_TIMER_GUARD(get_from_output_files_time);
|
|
super_version->current->MultiGet(read_options, &range, callback);
|
|
}
|
|
curr_value_size = range.GetValueSize();
|
|
if (curr_value_size > read_options.value_size_soft_limit) {
|
|
s = Status::Aborted();
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Post processing (decrement reference counts and record statistics)
|
|
PERF_TIMER_GUARD(get_post_process_time);
|
|
size_t num_found = 0;
|
|
uint64_t bytes_read = 0;
|
|
for (size_t i = start_key; i < start_key + num_keys - keys_left; ++i) {
|
|
KeyContext* key = (*sorted_keys)[i];
|
|
if (key->s->ok()) {
|
|
bytes_read += key->value->size();
|
|
num_found++;
|
|
}
|
|
}
|
|
if (keys_left) {
|
|
assert(s.IsTimedOut() || s.IsAborted());
|
|
for (size_t i = start_key + num_keys - keys_left; i < start_key + num_keys;
|
|
++i) {
|
|
KeyContext* key = (*sorted_keys)[i];
|
|
*key->s = s;
|
|
}
|
|
}
|
|
|
|
RecordTick(stats_, NUMBER_MULTIGET_CALLS);
|
|
RecordTick(stats_, NUMBER_MULTIGET_KEYS_READ, num_keys);
|
|
RecordTick(stats_, NUMBER_MULTIGET_KEYS_FOUND, num_found);
|
|
RecordTick(stats_, NUMBER_MULTIGET_BYTES_READ, bytes_read);
|
|
RecordInHistogram(stats_, BYTES_PER_MULTIGET, bytes_read);
|
|
PERF_COUNTER_ADD(multiget_read_bytes, bytes_read);
|
|
PERF_TIMER_STOP(get_post_process_time);
|
|
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::CreateColumnFamily(const ColumnFamilyOptions& cf_options,
|
|
const std::string& column_family,
|
|
ColumnFamilyHandle** handle) {
|
|
assert(handle != nullptr);
|
|
Status s = CreateColumnFamilyImpl(cf_options, column_family, handle);
|
|
if (s.ok()) {
|
|
s = WriteOptionsFile(true /*need_mutex_lock*/,
|
|
true /*need_enter_write_thread*/);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::CreateColumnFamilies(
|
|
const ColumnFamilyOptions& cf_options,
|
|
const std::vector<std::string>& column_family_names,
|
|
std::vector<ColumnFamilyHandle*>* handles) {
|
|
assert(handles != nullptr);
|
|
handles->clear();
|
|
size_t num_cf = column_family_names.size();
|
|
Status s;
|
|
bool success_once = false;
|
|
for (size_t i = 0; i < num_cf; i++) {
|
|
ColumnFamilyHandle* handle;
|
|
s = CreateColumnFamilyImpl(cf_options, column_family_names[i], &handle);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
handles->push_back(handle);
|
|
success_once = true;
|
|
}
|
|
if (success_once) {
|
|
Status persist_options_status = WriteOptionsFile(
|
|
true /*need_mutex_lock*/, true /*need_enter_write_thread*/);
|
|
if (s.ok() && !persist_options_status.ok()) {
|
|
s = persist_options_status;
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::CreateColumnFamilies(
|
|
const std::vector<ColumnFamilyDescriptor>& column_families,
|
|
std::vector<ColumnFamilyHandle*>* handles) {
|
|
assert(handles != nullptr);
|
|
handles->clear();
|
|
size_t num_cf = column_families.size();
|
|
Status s;
|
|
bool success_once = false;
|
|
for (size_t i = 0; i < num_cf; i++) {
|
|
ColumnFamilyHandle* handle;
|
|
s = CreateColumnFamilyImpl(column_families[i].options,
|
|
column_families[i].name, &handle);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
handles->push_back(handle);
|
|
success_once = true;
|
|
}
|
|
if (success_once) {
|
|
Status persist_options_status = WriteOptionsFile(
|
|
true /*need_mutex_lock*/, true /*need_enter_write_thread*/);
|
|
if (s.ok() && !persist_options_status.ok()) {
|
|
s = persist_options_status;
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::CreateColumnFamilyImpl(const ColumnFamilyOptions& cf_options,
|
|
const std::string& column_family_name,
|
|
ColumnFamilyHandle** handle) {
|
|
Status s;
|
|
*handle = nullptr;
|
|
|
|
DBOptions db_options =
|
|
BuildDBOptions(immutable_db_options_, mutable_db_options_);
|
|
s = ColumnFamilyData::ValidateOptions(db_options, cf_options);
|
|
if (s.ok()) {
|
|
for (auto& cf_path : cf_options.cf_paths) {
|
|
s = env_->CreateDirIfMissing(cf_path.path);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
SuperVersionContext sv_context(/* create_superversion */ true);
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
if (versions_->GetColumnFamilySet()->GetColumnFamily(column_family_name) !=
|
|
nullptr) {
|
|
return Status::InvalidArgument("Column family already exists");
|
|
}
|
|
VersionEdit edit;
|
|
edit.AddColumnFamily(column_family_name);
|
|
uint32_t new_id = versions_->GetColumnFamilySet()->GetNextColumnFamilyID();
|
|
edit.SetColumnFamily(new_id);
|
|
edit.SetLogNumber(logfile_number_);
|
|
edit.SetComparatorName(cf_options.comparator->Name());
|
|
|
|
// LogAndApply will both write the creation in MANIFEST and create
|
|
// ColumnFamilyData object
|
|
{ // write thread
|
|
WriteThread::Writer w;
|
|
write_thread_.EnterUnbatched(&w, &mutex_);
|
|
// LogAndApply will both write the creation in MANIFEST and create
|
|
// ColumnFamilyData object
|
|
s = versions_->LogAndApply(nullptr, MutableCFOptions(cf_options), &edit,
|
|
&mutex_, directories_.GetDbDir(), false,
|
|
&cf_options);
|
|
write_thread_.ExitUnbatched(&w);
|
|
}
|
|
if (s.ok()) {
|
|
auto* cfd =
|
|
versions_->GetColumnFamilySet()->GetColumnFamily(column_family_name);
|
|
assert(cfd != nullptr);
|
|
std::map<std::string, std::shared_ptr<FSDirectory>> dummy_created_dirs;
|
|
s = cfd->AddDirectories(&dummy_created_dirs);
|
|
}
|
|
if (s.ok()) {
|
|
auto* cfd =
|
|
versions_->GetColumnFamilySet()->GetColumnFamily(column_family_name);
|
|
assert(cfd != nullptr);
|
|
InstallSuperVersionAndScheduleWork(cfd, &sv_context,
|
|
*cfd->GetLatestMutableCFOptions());
|
|
|
|
if (!cfd->mem()->IsSnapshotSupported()) {
|
|
is_snapshot_supported_ = false;
|
|
}
|
|
|
|
cfd->set_initialized();
|
|
|
|
*handle = new ColumnFamilyHandleImpl(cfd, this, &mutex_);
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Created column family [%s] (ID %u)",
|
|
column_family_name.c_str(), (unsigned)cfd->GetID());
|
|
} else {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"Creating column family [%s] FAILED -- %s",
|
|
column_family_name.c_str(), s.ToString().c_str());
|
|
}
|
|
} // InstrumentedMutexLock l(&mutex_)
|
|
|
|
if (cf_options.preserve_internal_time_seconds > 0 ||
|
|
cf_options.preclude_last_level_data_seconds > 0) {
|
|
s = RegisterRecordSeqnoTimeWorker();
|
|
}
|
|
sv_context.Clean();
|
|
// this is outside the mutex
|
|
if (s.ok()) {
|
|
NewThreadStatusCfInfo(
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(*handle)->cfd());
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::DropColumnFamily(ColumnFamilyHandle* column_family) {
|
|
assert(column_family != nullptr);
|
|
Status s = DropColumnFamilyImpl(column_family);
|
|
if (s.ok()) {
|
|
s = WriteOptionsFile(true /*need_mutex_lock*/,
|
|
true /*need_enter_write_thread*/);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::DropColumnFamilies(
|
|
const std::vector<ColumnFamilyHandle*>& column_families) {
|
|
Status s;
|
|
bool success_once = false;
|
|
for (auto* handle : column_families) {
|
|
s = DropColumnFamilyImpl(handle);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
success_once = true;
|
|
}
|
|
if (success_once) {
|
|
Status persist_options_status = WriteOptionsFile(
|
|
true /*need_mutex_lock*/, true /*need_enter_write_thread*/);
|
|
if (s.ok() && !persist_options_status.ok()) {
|
|
s = persist_options_status;
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::DropColumnFamilyImpl(ColumnFamilyHandle* column_family) {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
if (cfd->GetID() == 0) {
|
|
return Status::InvalidArgument("Can't drop default column family");
|
|
}
|
|
|
|
bool cf_support_snapshot = cfd->mem()->IsSnapshotSupported();
|
|
|
|
VersionEdit edit;
|
|
edit.DropColumnFamily();
|
|
edit.SetColumnFamily(cfd->GetID());
|
|
|
|
Status s;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
if (cfd->IsDropped()) {
|
|
s = Status::InvalidArgument("Column family already dropped!\n");
|
|
}
|
|
if (s.ok()) {
|
|
// we drop column family from a single write thread
|
|
WriteThread::Writer w;
|
|
write_thread_.EnterUnbatched(&w, &mutex_);
|
|
s = versions_->LogAndApply(cfd, *cfd->GetLatestMutableCFOptions(), &edit,
|
|
&mutex_, directories_.GetDbDir());
|
|
write_thread_.ExitUnbatched(&w);
|
|
}
|
|
if (s.ok()) {
|
|
auto* mutable_cf_options = cfd->GetLatestMutableCFOptions();
|
|
max_total_in_memory_state_ -= mutable_cf_options->write_buffer_size *
|
|
mutable_cf_options->max_write_buffer_number;
|
|
}
|
|
|
|
if (!cf_support_snapshot) {
|
|
// Dropped Column Family doesn't support snapshot. Need to recalculate
|
|
// is_snapshot_supported_.
|
|
bool new_is_snapshot_supported = true;
|
|
for (auto c : *versions_->GetColumnFamilySet()) {
|
|
if (!c->IsDropped() && !c->mem()->IsSnapshotSupported()) {
|
|
new_is_snapshot_supported = false;
|
|
break;
|
|
}
|
|
}
|
|
is_snapshot_supported_ = new_is_snapshot_supported;
|
|
}
|
|
bg_cv_.SignalAll();
|
|
}
|
|
|
|
if (cfd->ioptions()->preserve_internal_time_seconds > 0 ||
|
|
cfd->ioptions()->preclude_last_level_data_seconds > 0) {
|
|
s = RegisterRecordSeqnoTimeWorker();
|
|
}
|
|
|
|
if (s.ok()) {
|
|
// Note that here we erase the associated cf_info of the to-be-dropped
|
|
// cfd before its ref-count goes to zero to avoid having to erase cf_info
|
|
// later inside db_mutex.
|
|
EraseThreadStatusCfInfo(cfd);
|
|
assert(cfd->IsDropped());
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"Dropped column family with id %u\n", cfd->GetID());
|
|
} else {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"Dropping column family with id %u FAILED -- %s\n",
|
|
cfd->GetID(), s.ToString().c_str());
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
bool DBImpl::KeyMayExist(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family, const Slice& key,
|
|
std::string* value, std::string* timestamp,
|
|
bool* value_found) {
|
|
assert(value != nullptr);
|
|
if (value_found != nullptr) {
|
|
// falsify later if key-may-exist but can't fetch value
|
|
*value_found = true;
|
|
}
|
|
ReadOptions roptions = read_options;
|
|
roptions.read_tier = kBlockCacheTier; // read from block cache only
|
|
PinnableSlice pinnable_val;
|
|
GetImplOptions get_impl_options;
|
|
get_impl_options.column_family = column_family;
|
|
get_impl_options.value = &pinnable_val;
|
|
get_impl_options.value_found = value_found;
|
|
get_impl_options.timestamp = timestamp;
|
|
auto s = GetImpl(roptions, key, get_impl_options);
|
|
value->assign(pinnable_val.data(), pinnable_val.size());
|
|
|
|
// If block_cache is enabled and the index block of the table didn't
|
|
// not present in block_cache, the return value will be Status::Incomplete.
|
|
// In this case, key may still exist in the table.
|
|
return s.ok() || s.IsIncomplete();
|
|
}
|
|
|
|
Iterator* DBImpl::NewIterator(const ReadOptions& read_options,
|
|
ColumnFamilyHandle* column_family) {
|
|
if (read_options.managed) {
|
|
return NewErrorIterator(
|
|
Status::NotSupported("Managed iterator is not supported anymore."));
|
|
}
|
|
Iterator* result = nullptr;
|
|
if (read_options.read_tier == kPersistedTier) {
|
|
return NewErrorIterator(Status::NotSupported(
|
|
"ReadTier::kPersistedData is not yet supported in iterators."));
|
|
}
|
|
|
|
assert(column_family);
|
|
|
|
if (read_options.timestamp) {
|
|
const Status s = FailIfTsMismatchCf(
|
|
column_family, *(read_options.timestamp), /*ts_for_read=*/true);
|
|
if (!s.ok()) {
|
|
return NewErrorIterator(s);
|
|
}
|
|
} else {
|
|
const Status s = FailIfCfHasTs(column_family);
|
|
if (!s.ok()) {
|
|
return NewErrorIterator(s);
|
|
}
|
|
}
|
|
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
ColumnFamilyData* cfd = cfh->cfd();
|
|
assert(cfd != nullptr);
|
|
ReadCallback* read_callback = nullptr; // No read callback provided.
|
|
if (read_options.tailing) {
|
|
#ifdef ROCKSDB_LITE
|
|
// not supported in lite version
|
|
result = nullptr;
|
|
|
|
#else
|
|
SuperVersion* sv = cfd->GetReferencedSuperVersion(this);
|
|
auto iter = new ForwardIterator(this, read_options, cfd, sv,
|
|
/* allow_unprepared_value */ true);
|
|
result = NewDBIterator(
|
|
env_, read_options, *cfd->ioptions(), sv->mutable_cf_options,
|
|
cfd->user_comparator(), iter, sv->current, kMaxSequenceNumber,
|
|
sv->mutable_cf_options.max_sequential_skip_in_iterations, read_callback,
|
|
this, cfd);
|
|
#endif
|
|
} else {
|
|
// Note: no need to consider the special case of
|
|
// last_seq_same_as_publish_seq_==false since NewIterator is overridden in
|
|
// WritePreparedTxnDB
|
|
result = NewIteratorImpl(read_options, cfd,
|
|
(read_options.snapshot != nullptr)
|
|
? read_options.snapshot->GetSequenceNumber()
|
|
: kMaxSequenceNumber,
|
|
read_callback);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
ArenaWrappedDBIter* DBImpl::NewIteratorImpl(const ReadOptions& read_options,
|
|
ColumnFamilyData* cfd,
|
|
SequenceNumber snapshot,
|
|
ReadCallback* read_callback,
|
|
bool expose_blob_index,
|
|
bool allow_refresh) {
|
|
SuperVersion* sv = cfd->GetReferencedSuperVersion(this);
|
|
|
|
TEST_SYNC_POINT("DBImpl::NewIterator:1");
|
|
TEST_SYNC_POINT("DBImpl::NewIterator:2");
|
|
|
|
if (snapshot == kMaxSequenceNumber) {
|
|
// Note that the snapshot is assigned AFTER referencing the super
|
|
// version because otherwise a flush happening in between may compact away
|
|
// data for the snapshot, so the reader would see neither data that was be
|
|
// visible to the snapshot before compaction nor the newer data inserted
|
|
// afterwards.
|
|
// Note that the super version might not contain all the data available
|
|
// to this snapshot, but in that case it can see all the data in the
|
|
// super version, which is a valid consistent state after the user
|
|
// calls NewIterator().
|
|
snapshot = versions_->LastSequence();
|
|
TEST_SYNC_POINT("DBImpl::NewIterator:3");
|
|
TEST_SYNC_POINT("DBImpl::NewIterator:4");
|
|
}
|
|
|
|
// Try to generate a DB iterator tree in continuous memory area to be
|
|
// cache friendly. Here is an example of result:
|
|
// +-------------------------------+
|
|
// | |
|
|
// | ArenaWrappedDBIter |
|
|
// | + |
|
|
// | +---> Inner Iterator ------------+
|
|
// | | | |
|
|
// | | +-- -- -- -- -- -- -- --+ |
|
|
// | +--- | Arena | |
|
|
// | | | |
|
|
// | Allocated Memory: | |
|
|
// | | +-------------------+ |
|
|
// | | | DBIter | <---+
|
|
// | | + |
|
|
// | | | +-> iter_ ------------+
|
|
// | | | | |
|
|
// | | +-------------------+ |
|
|
// | | | MergingIterator | <---+
|
|
// | | + |
|
|
// | | | +->child iter1 ------------+
|
|
// | | | | | |
|
|
// | | +->child iter2 ----------+ |
|
|
// | | | | | | |
|
|
// | | | +->child iter3 --------+ | |
|
|
// | | | | | |
|
|
// | | +-------------------+ | | |
|
|
// | | | Iterator1 | <--------+
|
|
// | | +-------------------+ | |
|
|
// | | | Iterator2 | <------+
|
|
// | | +-------------------+ |
|
|
// | | | Iterator3 | <----+
|
|
// | | +-------------------+
|
|
// | | |
|
|
// +-------+-----------------------+
|
|
//
|
|
// ArenaWrappedDBIter inlines an arena area where all the iterators in
|
|
// the iterator tree are allocated in the order of being accessed when
|
|
// querying.
|
|
// Laying out the iterators in the order of being accessed makes it more
|
|
// likely that any iterator pointer is close to the iterator it points to so
|
|
// that they are likely to be in the same cache line and/or page.
|
|
ArenaWrappedDBIter* db_iter = NewArenaWrappedDbIterator(
|
|
env_, read_options, *cfd->ioptions(), sv->mutable_cf_options, sv->current,
|
|
snapshot, sv->mutable_cf_options.max_sequential_skip_in_iterations,
|
|
sv->version_number, read_callback, this, cfd, expose_blob_index,
|
|
read_options.snapshot != nullptr ? false : allow_refresh);
|
|
|
|
InternalIterator* internal_iter = NewInternalIterator(
|
|
db_iter->GetReadOptions(), cfd, sv, db_iter->GetArena(), snapshot,
|
|
/* allow_unprepared_value */ true, db_iter);
|
|
db_iter->SetIterUnderDBIter(internal_iter);
|
|
|
|
return db_iter;
|
|
}
|
|
|
|
Status DBImpl::NewIterators(
|
|
const ReadOptions& read_options,
|
|
const std::vector<ColumnFamilyHandle*>& column_families,
|
|
std::vector<Iterator*>* iterators) {
|
|
if (read_options.managed) {
|
|
return Status::NotSupported("Managed iterator is not supported anymore.");
|
|
}
|
|
if (read_options.read_tier == kPersistedTier) {
|
|
return Status::NotSupported(
|
|
"ReadTier::kPersistedData is not yet supported in iterators.");
|
|
}
|
|
|
|
if (read_options.timestamp) {
|
|
for (auto* cf : column_families) {
|
|
assert(cf);
|
|
const Status s = FailIfTsMismatchCf(cf, *(read_options.timestamp),
|
|
/*ts_for_read=*/true);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
} else {
|
|
for (auto* cf : column_families) {
|
|
assert(cf);
|
|
const Status s = FailIfCfHasTs(cf);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
}
|
|
|
|
ReadCallback* read_callback = nullptr; // No read callback provided.
|
|
iterators->clear();
|
|
iterators->reserve(column_families.size());
|
|
if (read_options.tailing) {
|
|
#ifdef ROCKSDB_LITE
|
|
return Status::InvalidArgument(
|
|
"Tailing iterator not supported in RocksDB lite");
|
|
#else
|
|
for (auto cfh : column_families) {
|
|
auto cfd = static_cast_with_check<ColumnFamilyHandleImpl>(cfh)->cfd();
|
|
SuperVersion* sv = cfd->GetReferencedSuperVersion(this);
|
|
auto iter = new ForwardIterator(this, read_options, cfd, sv,
|
|
/* allow_unprepared_value */ true);
|
|
iterators->push_back(NewDBIterator(
|
|
env_, read_options, *cfd->ioptions(), sv->mutable_cf_options,
|
|
cfd->user_comparator(), iter, sv->current, kMaxSequenceNumber,
|
|
sv->mutable_cf_options.max_sequential_skip_in_iterations,
|
|
read_callback, this, cfd));
|
|
}
|
|
#endif
|
|
} else {
|
|
// Note: no need to consider the special case of
|
|
// last_seq_same_as_publish_seq_==false since NewIterators is overridden in
|
|
// WritePreparedTxnDB
|
|
auto snapshot = read_options.snapshot != nullptr
|
|
? read_options.snapshot->GetSequenceNumber()
|
|
: versions_->LastSequence();
|
|
for (size_t i = 0; i < column_families.size(); ++i) {
|
|
auto* cfd =
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(column_families[i])
|
|
->cfd();
|
|
iterators->push_back(
|
|
NewIteratorImpl(read_options, cfd, snapshot, read_callback));
|
|
}
|
|
}
|
|
|
|
return Status::OK();
|
|
}
|
|
|
|
const Snapshot* DBImpl::GetSnapshot() { return GetSnapshotImpl(false); }
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
const Snapshot* DBImpl::GetSnapshotForWriteConflictBoundary() {
|
|
return GetSnapshotImpl(true);
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
std::pair<Status, std::shared_ptr<const Snapshot>>
|
|
DBImpl::CreateTimestampedSnapshot(SequenceNumber snapshot_seq, uint64_t ts) {
|
|
assert(ts != std::numeric_limits<uint64_t>::max());
|
|
|
|
auto ret = CreateTimestampedSnapshotImpl(snapshot_seq, ts, /*lock=*/true);
|
|
return ret;
|
|
}
|
|
|
|
std::shared_ptr<const SnapshotImpl> DBImpl::GetTimestampedSnapshot(
|
|
uint64_t ts) const {
|
|
InstrumentedMutexLock lock_guard(&mutex_);
|
|
return timestamped_snapshots_.GetSnapshot(ts);
|
|
}
|
|
|
|
void DBImpl::ReleaseTimestampedSnapshotsOlderThan(uint64_t ts,
|
|
size_t* remaining_total_ss) {
|
|
autovector<std::shared_ptr<const SnapshotImpl>> snapshots_to_release;
|
|
{
|
|
InstrumentedMutexLock lock_guard(&mutex_);
|
|
timestamped_snapshots_.ReleaseSnapshotsOlderThan(ts, snapshots_to_release);
|
|
}
|
|
snapshots_to_release.clear();
|
|
|
|
if (remaining_total_ss) {
|
|
InstrumentedMutexLock lock_guard(&mutex_);
|
|
*remaining_total_ss = static_cast<size_t>(snapshots_.count());
|
|
}
|
|
}
|
|
|
|
Status DBImpl::GetTimestampedSnapshots(
|
|
uint64_t ts_lb, uint64_t ts_ub,
|
|
std::vector<std::shared_ptr<const Snapshot>>& timestamped_snapshots) const {
|
|
if (ts_lb >= ts_ub) {
|
|
return Status::InvalidArgument(
|
|
"timestamp lower bound must be smaller than upper bound");
|
|
}
|
|
timestamped_snapshots.clear();
|
|
InstrumentedMutexLock lock_guard(&mutex_);
|
|
timestamped_snapshots_.GetSnapshots(ts_lb, ts_ub, timestamped_snapshots);
|
|
return Status::OK();
|
|
}
|
|
|
|
SnapshotImpl* DBImpl::GetSnapshotImpl(bool is_write_conflict_boundary,
|
|
bool lock) {
|
|
int64_t unix_time = 0;
|
|
immutable_db_options_.clock->GetCurrentTime(&unix_time)
|
|
.PermitUncheckedError(); // Ignore error
|
|
SnapshotImpl* s = new SnapshotImpl;
|
|
|
|
if (lock) {
|
|
mutex_.Lock();
|
|
} else {
|
|
mutex_.AssertHeld();
|
|
}
|
|
// returns null if the underlying memtable does not support snapshot.
|
|
if (!is_snapshot_supported_) {
|
|
if (lock) {
|
|
mutex_.Unlock();
|
|
}
|
|
delete s;
|
|
return nullptr;
|
|
}
|
|
auto snapshot_seq = GetLastPublishedSequence();
|
|
SnapshotImpl* snapshot =
|
|
snapshots_.New(s, snapshot_seq, unix_time, is_write_conflict_boundary);
|
|
if (lock) {
|
|
mutex_.Unlock();
|
|
}
|
|
return snapshot;
|
|
}
|
|
|
|
std::pair<Status, std::shared_ptr<const SnapshotImpl>>
|
|
DBImpl::CreateTimestampedSnapshotImpl(SequenceNumber snapshot_seq, uint64_t ts,
|
|
bool lock) {
|
|
int64_t unix_time = 0;
|
|
immutable_db_options_.clock->GetCurrentTime(&unix_time)
|
|
.PermitUncheckedError(); // Ignore error
|
|
SnapshotImpl* s = new SnapshotImpl;
|
|
|
|
const bool need_update_seq = (snapshot_seq != kMaxSequenceNumber);
|
|
|
|
if (lock) {
|
|
mutex_.Lock();
|
|
} else {
|
|
mutex_.AssertHeld();
|
|
}
|
|
// returns null if the underlying memtable does not support snapshot.
|
|
if (!is_snapshot_supported_) {
|
|
if (lock) {
|
|
mutex_.Unlock();
|
|
}
|
|
delete s;
|
|
return std::make_pair(
|
|
Status::NotSupported("Memtable does not support snapshot"), nullptr);
|
|
}
|
|
|
|
// Caller is not write thread, thus didn't provide a valid snapshot_seq.
|
|
// Obtain seq from db.
|
|
if (!need_update_seq) {
|
|
snapshot_seq = GetLastPublishedSequence();
|
|
}
|
|
|
|
std::shared_ptr<const SnapshotImpl> latest =
|
|
timestamped_snapshots_.GetSnapshot(std::numeric_limits<uint64_t>::max());
|
|
|
|
// If there is already a latest timestamped snapshot, then we need to do some
|
|
// checks.
|
|
if (latest) {
|
|
uint64_t latest_snap_ts = latest->GetTimestamp();
|
|
SequenceNumber latest_snap_seq = latest->GetSequenceNumber();
|
|
assert(latest_snap_seq <= snapshot_seq);
|
|
bool needs_create_snap = true;
|
|
Status status;
|
|
std::shared_ptr<const SnapshotImpl> ret;
|
|
if (latest_snap_ts > ts) {
|
|
// A snapshot created later cannot have smaller timestamp than a previous
|
|
// timestamped snapshot.
|
|
needs_create_snap = false;
|
|
std::ostringstream oss;
|
|
oss << "snapshot exists with larger timestamp " << latest_snap_ts << " > "
|
|
<< ts;
|
|
status = Status::InvalidArgument(oss.str());
|
|
} else if (latest_snap_ts == ts) {
|
|
if (latest_snap_seq == snapshot_seq) {
|
|
// We are requesting the same sequence number and timestamp, thus can
|
|
// safely reuse (share) the current latest timestamped snapshot.
|
|
needs_create_snap = false;
|
|
ret = latest;
|
|
} else if (latest_snap_seq < snapshot_seq) {
|
|
// There may have been writes to the database since the latest
|
|
// timestamped snapshot, yet we are still requesting the same
|
|
// timestamp. In this case, we cannot create the new timestamped
|
|
// snapshot.
|
|
needs_create_snap = false;
|
|
std::ostringstream oss;
|
|
oss << "Allocated seq is " << snapshot_seq
|
|
<< ", while snapshot exists with smaller seq " << latest_snap_seq
|
|
<< " but same timestamp " << ts;
|
|
status = Status::InvalidArgument(oss.str());
|
|
}
|
|
}
|
|
if (!needs_create_snap) {
|
|
if (lock) {
|
|
mutex_.Unlock();
|
|
}
|
|
delete s;
|
|
return std::make_pair(status, ret);
|
|
} else {
|
|
status.PermitUncheckedError();
|
|
}
|
|
}
|
|
|
|
SnapshotImpl* snapshot =
|
|
snapshots_.New(s, snapshot_seq, unix_time,
|
|
/*is_write_conflict_boundary=*/true, ts);
|
|
|
|
std::shared_ptr<const SnapshotImpl> ret(
|
|
snapshot,
|
|
std::bind(&DBImpl::ReleaseSnapshot, this, std::placeholders::_1));
|
|
timestamped_snapshots_.AddSnapshot(ret);
|
|
|
|
// Caller is from write thread, and we need to update database's sequence
|
|
// number.
|
|
if (need_update_seq) {
|
|
assert(versions_);
|
|
if (last_seq_same_as_publish_seq_) {
|
|
versions_->SetLastSequence(snapshot_seq);
|
|
} else {
|
|
// TODO: support write-prepared/write-unprepared transactions with two
|
|
// write queues.
|
|
assert(false);
|
|
}
|
|
}
|
|
|
|
if (lock) {
|
|
mutex_.Unlock();
|
|
}
|
|
return std::make_pair(Status::OK(), ret);
|
|
}
|
|
|
|
namespace {
|
|
using CfdList = autovector<ColumnFamilyData*, 2>;
|
|
bool CfdListContains(const CfdList& list, ColumnFamilyData* cfd) {
|
|
for (const ColumnFamilyData* t : list) {
|
|
if (t == cfd) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
} // namespace
|
|
|
|
void DBImpl::ReleaseSnapshot(const Snapshot* s) {
|
|
if (s == nullptr) {
|
|
// DBImpl::GetSnapshot() can return nullptr when snapshot
|
|
// not supported by specifying the condition:
|
|
// inplace_update_support enabled.
|
|
return;
|
|
}
|
|
const SnapshotImpl* casted_s = reinterpret_cast<const SnapshotImpl*>(s);
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
snapshots_.Delete(casted_s);
|
|
uint64_t oldest_snapshot;
|
|
if (snapshots_.empty()) {
|
|
oldest_snapshot = GetLastPublishedSequence();
|
|
} else {
|
|
oldest_snapshot = snapshots_.oldest()->number_;
|
|
}
|
|
// Avoid to go through every column family by checking a global threshold
|
|
// first.
|
|
if (oldest_snapshot > bottommost_files_mark_threshold_) {
|
|
CfdList cf_scheduled;
|
|
for (auto* cfd : *versions_->GetColumnFamilySet()) {
|
|
if (!cfd->ioptions()->allow_ingest_behind) {
|
|
cfd->current()->storage_info()->UpdateOldestSnapshot(oldest_snapshot);
|
|
if (!cfd->current()
|
|
->storage_info()
|
|
->BottommostFilesMarkedForCompaction()
|
|
.empty()) {
|
|
SchedulePendingCompaction(cfd);
|
|
MaybeScheduleFlushOrCompaction();
|
|
cf_scheduled.push_back(cfd);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Calculate a new threshold, skipping those CFs where compactions are
|
|
// scheduled. We do not do the same pass as the previous loop because
|
|
// mutex might be unlocked during the loop, making the result inaccurate.
|
|
SequenceNumber new_bottommost_files_mark_threshold = kMaxSequenceNumber;
|
|
for (auto* cfd : *versions_->GetColumnFamilySet()) {
|
|
if (CfdListContains(cf_scheduled, cfd) ||
|
|
cfd->ioptions()->allow_ingest_behind) {
|
|
continue;
|
|
}
|
|
new_bottommost_files_mark_threshold = std::min(
|
|
new_bottommost_files_mark_threshold,
|
|
cfd->current()->storage_info()->bottommost_files_mark_threshold());
|
|
}
|
|
bottommost_files_mark_threshold_ = new_bottommost_files_mark_threshold;
|
|
}
|
|
}
|
|
delete casted_s;
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::GetPropertiesOfAllTables(ColumnFamilyHandle* column_family,
|
|
TablePropertiesCollection* props) {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
// Increment the ref count
|
|
mutex_.Lock();
|
|
auto version = cfd->current();
|
|
version->Ref();
|
|
mutex_.Unlock();
|
|
|
|
auto s = version->GetPropertiesOfAllTables(props);
|
|
|
|
// Decrement the ref count
|
|
mutex_.Lock();
|
|
version->Unref();
|
|
mutex_.Unlock();
|
|
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::GetPropertiesOfTablesInRange(ColumnFamilyHandle* column_family,
|
|
const Range* range, std::size_t n,
|
|
TablePropertiesCollection* props) {
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
|
|
// Increment the ref count
|
|
mutex_.Lock();
|
|
auto version = cfd->current();
|
|
version->Ref();
|
|
mutex_.Unlock();
|
|
|
|
auto s = version->GetPropertiesOfTablesInRange(range, n, props);
|
|
|
|
// Decrement the ref count
|
|
mutex_.Lock();
|
|
version->Unref();
|
|
mutex_.Unlock();
|
|
|
|
return s;
|
|
}
|
|
|
|
#endif // ROCKSDB_LITE
|
|
|
|
const std::string& DBImpl::GetName() const { return dbname_; }
|
|
|
|
Env* DBImpl::GetEnv() const { return env_; }
|
|
|
|
FileSystem* DB::GetFileSystem() const {
|
|
const auto& fs = GetEnv()->GetFileSystem();
|
|
return fs.get();
|
|
}
|
|
|
|
FileSystem* DBImpl::GetFileSystem() const {
|
|
return immutable_db_options_.fs.get();
|
|
}
|
|
|
|
SystemClock* DBImpl::GetSystemClock() const {
|
|
return immutable_db_options_.clock;
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
Status DBImpl::StartIOTrace(const TraceOptions& trace_options,
|
|
std::unique_ptr<TraceWriter>&& trace_writer) {
|
|
assert(trace_writer != nullptr);
|
|
return io_tracer_->StartIOTrace(GetSystemClock(), trace_options,
|
|
std::move(trace_writer));
|
|
}
|
|
|
|
Status DBImpl::EndIOTrace() {
|
|
io_tracer_->EndIOTrace();
|
|
return Status::OK();
|
|
}
|
|
|
|
#endif // ROCKSDB_LITE
|
|
|
|
Options DBImpl::GetOptions(ColumnFamilyHandle* column_family) const {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
return Options(BuildDBOptions(immutable_db_options_, mutable_db_options_),
|
|
cfh->cfd()->GetLatestCFOptions());
|
|
}
|
|
|
|
DBOptions DBImpl::GetDBOptions() const {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return BuildDBOptions(immutable_db_options_, mutable_db_options_);
|
|
}
|
|
|
|
bool DBImpl::GetProperty(ColumnFamilyHandle* column_family,
|
|
const Slice& property, std::string* value) {
|
|
const DBPropertyInfo* property_info = GetPropertyInfo(property);
|
|
value->clear();
|
|
auto cfd =
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(column_family)->cfd();
|
|
if (property_info == nullptr) {
|
|
return false;
|
|
} else if (property_info->handle_int) {
|
|
uint64_t int_value;
|
|
bool ret_value =
|
|
GetIntPropertyInternal(cfd, *property_info, false, &int_value);
|
|
if (ret_value) {
|
|
*value = std::to_string(int_value);
|
|
}
|
|
return ret_value;
|
|
} else if (property_info->handle_string) {
|
|
if (property_info->need_out_of_mutex) {
|
|
return cfd->internal_stats()->GetStringProperty(*property_info, property,
|
|
value);
|
|
} else {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return cfd->internal_stats()->GetStringProperty(*property_info, property,
|
|
value);
|
|
}
|
|
} else if (property_info->handle_string_dbimpl) {
|
|
if (property_info->need_out_of_mutex) {
|
|
return (this->*(property_info->handle_string_dbimpl))(value);
|
|
} else {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return (this->*(property_info->handle_string_dbimpl))(value);
|
|
}
|
|
}
|
|
// Shouldn't reach here since exactly one of handle_string and handle_int
|
|
// should be non-nullptr.
|
|
assert(false);
|
|
return false;
|
|
}
|
|
|
|
bool DBImpl::GetMapProperty(ColumnFamilyHandle* column_family,
|
|
const Slice& property,
|
|
std::map<std::string, std::string>* value) {
|
|
const DBPropertyInfo* property_info = GetPropertyInfo(property);
|
|
value->clear();
|
|
auto cfd =
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(column_family)->cfd();
|
|
if (property_info == nullptr) {
|
|
return false;
|
|
} else if (property_info->handle_map) {
|
|
if (property_info->need_out_of_mutex) {
|
|
return cfd->internal_stats()->GetMapProperty(*property_info, property,
|
|
value);
|
|
} else {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return cfd->internal_stats()->GetMapProperty(*property_info, property,
|
|
value);
|
|
}
|
|
}
|
|
// If we reach this point it means that handle_map is not provided for the
|
|
// requested property
|
|
return false;
|
|
}
|
|
|
|
bool DBImpl::GetIntProperty(ColumnFamilyHandle* column_family,
|
|
const Slice& property, uint64_t* value) {
|
|
const DBPropertyInfo* property_info = GetPropertyInfo(property);
|
|
if (property_info == nullptr || property_info->handle_int == nullptr) {
|
|
return false;
|
|
}
|
|
auto cfd =
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(column_family)->cfd();
|
|
return GetIntPropertyInternal(cfd, *property_info, false, value);
|
|
}
|
|
|
|
bool DBImpl::GetIntPropertyInternal(ColumnFamilyData* cfd,
|
|
const DBPropertyInfo& property_info,
|
|
bool is_locked, uint64_t* value) {
|
|
assert(property_info.handle_int != nullptr);
|
|
if (!property_info.need_out_of_mutex) {
|
|
if (is_locked) {
|
|
mutex_.AssertHeld();
|
|
return cfd->internal_stats()->GetIntProperty(property_info, value, this);
|
|
} else {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return cfd->internal_stats()->GetIntProperty(property_info, value, this);
|
|
}
|
|
} else {
|
|
SuperVersion* sv = nullptr;
|
|
if (is_locked) {
|
|
mutex_.Unlock();
|
|
}
|
|
sv = GetAndRefSuperVersion(cfd);
|
|
|
|
bool ret = cfd->internal_stats()->GetIntPropertyOutOfMutex(
|
|
property_info, sv->current, value);
|
|
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
if (is_locked) {
|
|
mutex_.Lock();
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
bool DBImpl::GetPropertyHandleOptionsStatistics(std::string* value) {
|
|
assert(value != nullptr);
|
|
Statistics* statistics = immutable_db_options_.stats;
|
|
if (!statistics) {
|
|
return false;
|
|
}
|
|
*value = statistics->ToString();
|
|
return true;
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::ResetStats() {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
for (auto* cfd : *versions_->GetColumnFamilySet()) {
|
|
if (cfd->initialized()) {
|
|
cfd->internal_stats()->Clear();
|
|
}
|
|
}
|
|
return Status::OK();
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
bool DBImpl::GetAggregatedIntProperty(const Slice& property,
|
|
uint64_t* aggregated_value) {
|
|
const DBPropertyInfo* property_info = GetPropertyInfo(property);
|
|
if (property_info == nullptr || property_info->handle_int == nullptr) {
|
|
return false;
|
|
}
|
|
|
|
uint64_t sum = 0;
|
|
bool ret = true;
|
|
{
|
|
// Needs mutex to protect the list of column families.
|
|
InstrumentedMutexLock l(&mutex_);
|
|
uint64_t value;
|
|
for (auto* cfd : versions_->GetRefedColumnFamilySet()) {
|
|
if (!cfd->initialized()) {
|
|
continue;
|
|
}
|
|
ret = GetIntPropertyInternal(cfd, *property_info, true, &value);
|
|
// GetIntPropertyInternal may release db mutex and re-acquire it.
|
|
mutex_.AssertHeld();
|
|
if (ret) {
|
|
sum += value;
|
|
} else {
|
|
ret = false;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
*aggregated_value = sum;
|
|
return ret;
|
|
}
|
|
|
|
SuperVersion* DBImpl::GetAndRefSuperVersion(ColumnFamilyData* cfd) {
|
|
// TODO(ljin): consider using GetReferencedSuperVersion() directly
|
|
return cfd->GetThreadLocalSuperVersion(this);
|
|
}
|
|
|
|
// REQUIRED: this function should only be called on the write thread or if the
|
|
// mutex is held.
|
|
SuperVersion* DBImpl::GetAndRefSuperVersion(uint32_t column_family_id) {
|
|
auto column_family_set = versions_->GetColumnFamilySet();
|
|
auto cfd = column_family_set->GetColumnFamily(column_family_id);
|
|
if (!cfd) {
|
|
return nullptr;
|
|
}
|
|
|
|
return GetAndRefSuperVersion(cfd);
|
|
}
|
|
|
|
void DBImpl::CleanupSuperVersion(SuperVersion* sv) {
|
|
// Release SuperVersion
|
|
if (sv->Unref()) {
|
|
bool defer_purge = immutable_db_options().avoid_unnecessary_blocking_io;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
sv->Cleanup();
|
|
if (defer_purge) {
|
|
AddSuperVersionsToFreeQueue(sv);
|
|
SchedulePurge();
|
|
}
|
|
}
|
|
if (!defer_purge) {
|
|
delete sv;
|
|
}
|
|
RecordTick(stats_, NUMBER_SUPERVERSION_CLEANUPS);
|
|
}
|
|
RecordTick(stats_, NUMBER_SUPERVERSION_RELEASES);
|
|
}
|
|
|
|
void DBImpl::ReturnAndCleanupSuperVersion(ColumnFamilyData* cfd,
|
|
SuperVersion* sv) {
|
|
if (!cfd->ReturnThreadLocalSuperVersion(sv)) {
|
|
CleanupSuperVersion(sv);
|
|
}
|
|
}
|
|
|
|
// REQUIRED: this function should only be called on the write thread.
|
|
void DBImpl::ReturnAndCleanupSuperVersion(uint32_t column_family_id,
|
|
SuperVersion* sv) {
|
|
auto column_family_set = versions_->GetColumnFamilySet();
|
|
auto cfd = column_family_set->GetColumnFamily(column_family_id);
|
|
|
|
// If SuperVersion is held, and we successfully fetched a cfd using
|
|
// GetAndRefSuperVersion(), it must still exist.
|
|
assert(cfd != nullptr);
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
}
|
|
|
|
// REQUIRED: this function should only be called on the write thread or if the
|
|
// mutex is held.
|
|
ColumnFamilyHandle* DBImpl::GetColumnFamilyHandle(uint32_t column_family_id) {
|
|
ColumnFamilyMemTables* cf_memtables = column_family_memtables_.get();
|
|
|
|
if (!cf_memtables->Seek(column_family_id)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return cf_memtables->GetColumnFamilyHandle();
|
|
}
|
|
|
|
// REQUIRED: mutex is NOT held.
|
|
std::unique_ptr<ColumnFamilyHandle> DBImpl::GetColumnFamilyHandleUnlocked(
|
|
uint32_t column_family_id) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
auto* cfd =
|
|
versions_->GetColumnFamilySet()->GetColumnFamily(column_family_id);
|
|
if (cfd == nullptr) {
|
|
return nullptr;
|
|
}
|
|
|
|
return std::unique_ptr<ColumnFamilyHandleImpl>(
|
|
new ColumnFamilyHandleImpl(cfd, this, &mutex_));
|
|
}
|
|
|
|
void DBImpl::GetApproximateMemTableStats(ColumnFamilyHandle* column_family,
|
|
const Range& range,
|
|
uint64_t* const count,
|
|
uint64_t* const size) {
|
|
ColumnFamilyHandleImpl* cfh =
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
ColumnFamilyData* cfd = cfh->cfd();
|
|
SuperVersion* sv = GetAndRefSuperVersion(cfd);
|
|
|
|
// Convert user_key into a corresponding internal key.
|
|
InternalKey k1(range.start, kMaxSequenceNumber, kValueTypeForSeek);
|
|
InternalKey k2(range.limit, kMaxSequenceNumber, kValueTypeForSeek);
|
|
MemTable::MemTableStats memStats =
|
|
sv->mem->ApproximateStats(k1.Encode(), k2.Encode());
|
|
MemTable::MemTableStats immStats =
|
|
sv->imm->ApproximateStats(k1.Encode(), k2.Encode());
|
|
*count = memStats.count + immStats.count;
|
|
*size = memStats.size + immStats.size;
|
|
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
}
|
|
|
|
Status DBImpl::GetApproximateSizes(const SizeApproximationOptions& options,
|
|
ColumnFamilyHandle* column_family,
|
|
const Range* range, int n, uint64_t* sizes) {
|
|
if (!options.include_memtables && !options.include_files) {
|
|
return Status::InvalidArgument("Invalid options");
|
|
}
|
|
|
|
const Comparator* const ucmp = column_family->GetComparator();
|
|
assert(ucmp);
|
|
size_t ts_sz = ucmp->timestamp_size();
|
|
|
|
Version* v;
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
auto cfd = cfh->cfd();
|
|
SuperVersion* sv = GetAndRefSuperVersion(cfd);
|
|
v = sv->current;
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
Slice start = range[i].start;
|
|
Slice limit = range[i].limit;
|
|
|
|
// Add timestamp if needed
|
|
std::string start_with_ts, limit_with_ts;
|
|
if (ts_sz > 0) {
|
|
// Maximum timestamp means including all key with any timestamp
|
|
AppendKeyWithMaxTimestamp(&start_with_ts, start, ts_sz);
|
|
// Append a maximum timestamp as the range limit is exclusive:
|
|
// [start, limit)
|
|
AppendKeyWithMaxTimestamp(&limit_with_ts, limit, ts_sz);
|
|
start = start_with_ts;
|
|
limit = limit_with_ts;
|
|
}
|
|
// Convert user_key into a corresponding internal key.
|
|
InternalKey k1(start, kMaxSequenceNumber, kValueTypeForSeek);
|
|
InternalKey k2(limit, kMaxSequenceNumber, kValueTypeForSeek);
|
|
sizes[i] = 0;
|
|
if (options.include_files) {
|
|
sizes[i] += versions_->ApproximateSize(
|
|
options, v, k1.Encode(), k2.Encode(), /*start_level=*/0,
|
|
/*end_level=*/-1, TableReaderCaller::kUserApproximateSize);
|
|
}
|
|
if (options.include_memtables) {
|
|
sizes[i] += sv->mem->ApproximateStats(k1.Encode(), k2.Encode()).size;
|
|
sizes[i] += sv->imm->ApproximateStats(k1.Encode(), k2.Encode()).size;
|
|
}
|
|
}
|
|
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
return Status::OK();
|
|
}
|
|
|
|
std::list<uint64_t>::iterator
|
|
DBImpl::CaptureCurrentFileNumberInPendingOutputs() {
|
|
// We need to remember the iterator of our insert, because after the
|
|
// background job is done, we need to remove that element from
|
|
// pending_outputs_.
|
|
pending_outputs_.push_back(versions_->current_next_file_number());
|
|
auto pending_outputs_inserted_elem = pending_outputs_.end();
|
|
--pending_outputs_inserted_elem;
|
|
return pending_outputs_inserted_elem;
|
|
}
|
|
|
|
void DBImpl::ReleaseFileNumberFromPendingOutputs(
|
|
std::unique_ptr<std::list<uint64_t>::iterator>& v) {
|
|
if (v.get() != nullptr) {
|
|
pending_outputs_.erase(*v.get());
|
|
v.reset();
|
|
}
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
Status DBImpl::GetUpdatesSince(
|
|
SequenceNumber seq, std::unique_ptr<TransactionLogIterator>* iter,
|
|
const TransactionLogIterator::ReadOptions& read_options) {
|
|
RecordTick(stats_, GET_UPDATES_SINCE_CALLS);
|
|
if (seq_per_batch_) {
|
|
return Status::NotSupported(
|
|
"This API is not yet compatible with write-prepared/write-unprepared "
|
|
"transactions");
|
|
}
|
|
if (seq > versions_->LastSequence()) {
|
|
return Status::NotFound("Requested sequence not yet written in the db");
|
|
}
|
|
return wal_manager_.GetUpdatesSince(seq, iter, read_options, versions_.get());
|
|
}
|
|
|
|
Status DBImpl::DeleteFile(std::string name) {
|
|
uint64_t number;
|
|
FileType type;
|
|
WalFileType log_type;
|
|
if (!ParseFileName(name, &number, &type, &log_type) ||
|
|
(type != kTableFile && type != kWalFile)) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log, "DeleteFile %s failed.\n",
|
|
name.c_str());
|
|
return Status::InvalidArgument("Invalid file name");
|
|
}
|
|
|
|
if (type == kWalFile) {
|
|
// Only allow deleting archived log files
|
|
if (log_type != kArchivedLogFile) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"DeleteFile %s failed - not archived log.\n",
|
|
name.c_str());
|
|
return Status::NotSupported("Delete only supported for archived logs");
|
|
}
|
|
Status status = wal_manager_.DeleteFile(name, number);
|
|
if (!status.ok()) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"DeleteFile %s failed -- %s.\n", name.c_str(),
|
|
status.ToString().c_str());
|
|
}
|
|
return status;
|
|
}
|
|
|
|
Status status;
|
|
int level;
|
|
FileMetaData* metadata;
|
|
ColumnFamilyData* cfd;
|
|
VersionEdit edit;
|
|
JobContext job_context(next_job_id_.fetch_add(1), true);
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
status = versions_->GetMetadataForFile(number, &level, &metadata, &cfd);
|
|
if (!status.ok()) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"DeleteFile %s failed. File not found\n", name.c_str());
|
|
job_context.Clean();
|
|
return Status::InvalidArgument("File not found");
|
|
}
|
|
assert(level < cfd->NumberLevels());
|
|
|
|
// If the file is being compacted no need to delete.
|
|
if (metadata->being_compacted) {
|
|
ROCKS_LOG_INFO(immutable_db_options_.info_log,
|
|
"DeleteFile %s Skipped. File about to be compacted\n",
|
|
name.c_str());
|
|
job_context.Clean();
|
|
return Status::OK();
|
|
}
|
|
|
|
// Only the files in the last level can be deleted externally.
|
|
// This is to make sure that any deletion tombstones are not
|
|
// lost. Check that the level passed is the last level.
|
|
auto* vstoreage = cfd->current()->storage_info();
|
|
for (int i = level + 1; i < cfd->NumberLevels(); i++) {
|
|
if (vstoreage->NumLevelFiles(i) != 0) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"DeleteFile %s FAILED. File not in last level\n",
|
|
name.c_str());
|
|
job_context.Clean();
|
|
return Status::InvalidArgument("File not in last level");
|
|
}
|
|
}
|
|
// if level == 0, it has to be the oldest file
|
|
if (level == 0 &&
|
|
vstoreage->LevelFiles(0).back()->fd.GetNumber() != number) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"DeleteFile %s failed ---"
|
|
" target file in level 0 must be the oldest.",
|
|
name.c_str());
|
|
job_context.Clean();
|
|
return Status::InvalidArgument("File in level 0, but not oldest");
|
|
}
|
|
edit.SetColumnFamily(cfd->GetID());
|
|
edit.DeleteFile(level, number);
|
|
status = versions_->LogAndApply(cfd, *cfd->GetLatestMutableCFOptions(),
|
|
&edit, &mutex_, directories_.GetDbDir());
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWork(cfd,
|
|
&job_context.superversion_contexts[0],
|
|
*cfd->GetLatestMutableCFOptions());
|
|
}
|
|
FindObsoleteFiles(&job_context, false);
|
|
} // lock released here
|
|
|
|
LogFlush(immutable_db_options_.info_log);
|
|
// remove files outside the db-lock
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
// Call PurgeObsoleteFiles() without holding mutex.
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
return status;
|
|
}
|
|
|
|
Status DBImpl::DeleteFilesInRanges(ColumnFamilyHandle* column_family,
|
|
const RangePtr* ranges, size_t n,
|
|
bool include_end) {
|
|
Status status = Status::OK();
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(column_family);
|
|
ColumnFamilyData* cfd = cfh->cfd();
|
|
VersionEdit edit;
|
|
std::set<FileMetaData*> deleted_files;
|
|
JobContext job_context(next_job_id_.fetch_add(1), true);
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
Version* input_version = cfd->current();
|
|
|
|
auto* vstorage = input_version->storage_info();
|
|
for (size_t r = 0; r < n; r++) {
|
|
auto begin = ranges[r].start, end = ranges[r].limit;
|
|
for (int i = 1; i < cfd->NumberLevels(); i++) {
|
|
if (vstorage->LevelFiles(i).empty() ||
|
|
!vstorage->OverlapInLevel(i, begin, end)) {
|
|
continue;
|
|
}
|
|
std::vector<FileMetaData*> level_files;
|
|
InternalKey begin_storage, end_storage, *begin_key, *end_key;
|
|
if (begin == nullptr) {
|
|
begin_key = nullptr;
|
|
} else {
|
|
begin_storage.SetMinPossibleForUserKey(*begin);
|
|
begin_key = &begin_storage;
|
|
}
|
|
if (end == nullptr) {
|
|
end_key = nullptr;
|
|
} else {
|
|
end_storage.SetMaxPossibleForUserKey(*end);
|
|
end_key = &end_storage;
|
|
}
|
|
|
|
vstorage->GetCleanInputsWithinInterval(
|
|
i, begin_key, end_key, &level_files, -1 /* hint_index */,
|
|
nullptr /* file_index */);
|
|
FileMetaData* level_file;
|
|
for (uint32_t j = 0; j < level_files.size(); j++) {
|
|
level_file = level_files[j];
|
|
if (level_file->being_compacted) {
|
|
continue;
|
|
}
|
|
if (deleted_files.find(level_file) != deleted_files.end()) {
|
|
continue;
|
|
}
|
|
if (!include_end && end != nullptr &&
|
|
cfd->user_comparator()->Compare(level_file->largest.user_key(),
|
|
*end) == 0) {
|
|
continue;
|
|
}
|
|
edit.SetColumnFamily(cfd->GetID());
|
|
edit.DeleteFile(i, level_file->fd.GetNumber());
|
|
deleted_files.insert(level_file);
|
|
level_file->being_compacted = true;
|
|
}
|
|
vstorage->ComputeCompactionScore(*cfd->ioptions(),
|
|
*cfd->GetLatestMutableCFOptions());
|
|
}
|
|
}
|
|
if (edit.GetDeletedFiles().empty()) {
|
|
job_context.Clean();
|
|
return status;
|
|
}
|
|
input_version->Ref();
|
|
status = versions_->LogAndApply(cfd, *cfd->GetLatestMutableCFOptions(),
|
|
&edit, &mutex_, directories_.GetDbDir());
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWork(cfd,
|
|
&job_context.superversion_contexts[0],
|
|
*cfd->GetLatestMutableCFOptions());
|
|
}
|
|
for (auto* deleted_file : deleted_files) {
|
|
deleted_file->being_compacted = false;
|
|
}
|
|
input_version->Unref();
|
|
FindObsoleteFiles(&job_context, false);
|
|
} // lock released here
|
|
|
|
LogFlush(immutable_db_options_.info_log);
|
|
// remove files outside the db-lock
|
|
if (job_context.HaveSomethingToDelete()) {
|
|
// Call PurgeObsoleteFiles() without holding mutex.
|
|
PurgeObsoleteFiles(job_context);
|
|
}
|
|
job_context.Clean();
|
|
return status;
|
|
}
|
|
|
|
void DBImpl::GetLiveFilesMetaData(std::vector<LiveFileMetaData>* metadata) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
versions_->GetLiveFilesMetaData(metadata);
|
|
}
|
|
|
|
Status DBImpl::GetLiveFilesChecksumInfo(FileChecksumList* checksum_list) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
return versions_->GetLiveFilesChecksumInfo(checksum_list);
|
|
}
|
|
|
|
void DBImpl::GetColumnFamilyMetaData(ColumnFamilyHandle* column_family,
|
|
ColumnFamilyMetaData* cf_meta) {
|
|
assert(column_family);
|
|
auto* cfd =
|
|
static_cast_with_check<ColumnFamilyHandleImpl>(column_family)->cfd();
|
|
auto* sv = GetAndRefSuperVersion(cfd);
|
|
{
|
|
// Without mutex, Version::GetColumnFamilyMetaData will have data race with
|
|
// Compaction::MarkFilesBeingCompacted. One solution is to use mutex, but
|
|
// this may cause regression. An alternative is to make
|
|
// FileMetaData::being_compacted atomic, but it will make FileMetaData
|
|
// non-copy-able. Another option is to separate these variables from
|
|
// original FileMetaData struct, and this requires re-organization of data
|
|
// structures. For now, we take the easy approach. If
|
|
// DB::GetColumnFamilyMetaData is not called frequently, the regression
|
|
// should not be big. We still need to keep an eye on it.
|
|
InstrumentedMutexLock l(&mutex_);
|
|
sv->current->GetColumnFamilyMetaData(cf_meta);
|
|
}
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
}
|
|
|
|
void DBImpl::GetAllColumnFamilyMetaData(
|
|
std::vector<ColumnFamilyMetaData>* metadata) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
for (auto cfd : *(versions_->GetColumnFamilySet())) {
|
|
{
|
|
metadata->emplace_back();
|
|
cfd->current()->GetColumnFamilyMetaData(&metadata->back());
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif // ROCKSDB_LITE
|
|
|
|
Status DBImpl::CheckConsistency() {
|
|
mutex_.AssertHeld();
|
|
std::vector<LiveFileMetaData> metadata;
|
|
versions_->GetLiveFilesMetaData(&metadata);
|
|
TEST_SYNC_POINT("DBImpl::CheckConsistency:AfterGetLiveFilesMetaData");
|
|
|
|
std::string corruption_messages;
|
|
|
|
if (immutable_db_options_.skip_checking_sst_file_sizes_on_db_open) {
|
|
// Instead of calling GetFileSize() for each expected file, call
|
|
// GetChildren() for the DB directory and check that all expected files
|
|
// are listed, without checking their sizes.
|
|
// Since sst files might be in different directories, do it for each
|
|
// directory separately.
|
|
std::map<std::string, std::vector<std::string>> files_by_directory;
|
|
for (const auto& md : metadata) {
|
|
// md.name has a leading "/". Remove it.
|
|
std::string fname = md.name;
|
|
if (!fname.empty() && fname[0] == '/') {
|
|
fname = fname.substr(1);
|
|
}
|
|
files_by_directory[md.db_path].push_back(fname);
|
|
}
|
|
|
|
IOOptions io_opts;
|
|
io_opts.do_not_recurse = true;
|
|
for (const auto& dir_files : files_by_directory) {
|
|
std::string directory = dir_files.first;
|
|
std::vector<std::string> existing_files;
|
|
Status s = fs_->GetChildren(directory, io_opts, &existing_files,
|
|
/*IODebugContext*=*/nullptr);
|
|
if (!s.ok()) {
|
|
corruption_messages +=
|
|
"Can't list files in " + directory + ": " + s.ToString() + "\n";
|
|
continue;
|
|
}
|
|
std::sort(existing_files.begin(), existing_files.end());
|
|
|
|
for (const std::string& fname : dir_files.second) {
|
|
if (!std::binary_search(existing_files.begin(), existing_files.end(),
|
|
fname) &&
|
|
!std::binary_search(existing_files.begin(), existing_files.end(),
|
|
Rocks2LevelTableFileName(fname))) {
|
|
corruption_messages +=
|
|
"Missing sst file " + fname + " in " + directory + "\n";
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
for (const auto& md : metadata) {
|
|
// md.name has a leading "/".
|
|
std::string file_path = md.db_path + md.name;
|
|
|
|
uint64_t fsize = 0;
|
|
TEST_SYNC_POINT("DBImpl::CheckConsistency:BeforeGetFileSize");
|
|
Status s = env_->GetFileSize(file_path, &fsize);
|
|
if (!s.ok() &&
|
|
env_->GetFileSize(Rocks2LevelTableFileName(file_path), &fsize).ok()) {
|
|
s = Status::OK();
|
|
}
|
|
if (!s.ok()) {
|
|
corruption_messages +=
|
|
"Can't access " + md.name + ": " + s.ToString() + "\n";
|
|
} else if (fsize != md.size) {
|
|
corruption_messages += "Sst file size mismatch: " + file_path +
|
|
". Size recorded in manifest " +
|
|
std::to_string(md.size) + ", actual size " +
|
|
std::to_string(fsize) + "\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
if (corruption_messages.size() == 0) {
|
|
return Status::OK();
|
|
} else {
|
|
return Status::Corruption(corruption_messages);
|
|
}
|
|
}
|
|
|
|
Status DBImpl::GetDbIdentity(std::string& identity) const {
|
|
identity.assign(db_id_);
|
|
return Status::OK();
|
|
}
|
|
|
|
Status DBImpl::GetDbIdentityFromIdentityFile(std::string* identity) const {
|
|
std::string idfilename = IdentityFileName(dbname_);
|
|
const FileOptions soptions;
|
|
|
|
Status s = ReadFileToString(fs_.get(), idfilename, identity);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
// If last character is '\n' remove it from identity. (Old implementations
|
|
// of Env::GenerateUniqueId() would include a trailing '\n'.)
|
|
if (identity->size() > 0 && identity->back() == '\n') {
|
|
identity->pop_back();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::GetDbSessionId(std::string& session_id) const {
|
|
session_id.assign(db_session_id_);
|
|
return Status::OK();
|
|
}
|
|
|
|
namespace {
|
|
SemiStructuredUniqueIdGen* DbSessionIdGen() {
|
|
static SemiStructuredUniqueIdGen gen;
|
|
return &gen;
|
|
}
|
|
} // namespace
|
|
|
|
void DBImpl::TEST_ResetDbSessionIdGen() { DbSessionIdGen()->Reset(); }
|
|
|
|
std::string DBImpl::GenerateDbSessionId(Env*) {
|
|
// See SemiStructuredUniqueIdGen for its desirable properties.
|
|
auto gen = DbSessionIdGen();
|
|
|
|
uint64_t lo, hi;
|
|
gen->GenerateNext(&hi, &lo);
|
|
if (lo == 0) {
|
|
// Avoid emitting session ID with lo==0, so that SST unique
|
|
// IDs can be more easily ensured non-zero
|
|
gen->GenerateNext(&hi, &lo);
|
|
assert(lo != 0);
|
|
}
|
|
return EncodeSessionId(hi, lo);
|
|
}
|
|
|
|
void DBImpl::SetDbSessionId() {
|
|
db_session_id_ = GenerateDbSessionId(env_);
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::SetDbSessionId", &db_session_id_);
|
|
}
|
|
|
|
// Default implementation -- returns not supported status
|
|
Status DB::CreateColumnFamily(const ColumnFamilyOptions& /*cf_options*/,
|
|
const std::string& /*column_family_name*/,
|
|
ColumnFamilyHandle** /*handle*/) {
|
|
return Status::NotSupported("");
|
|
}
|
|
|
|
Status DB::CreateColumnFamilies(
|
|
const ColumnFamilyOptions& /*cf_options*/,
|
|
const std::vector<std::string>& /*column_family_names*/,
|
|
std::vector<ColumnFamilyHandle*>* /*handles*/) {
|
|
return Status::NotSupported("");
|
|
}
|
|
|
|
Status DB::CreateColumnFamilies(
|
|
const std::vector<ColumnFamilyDescriptor>& /*column_families*/,
|
|
std::vector<ColumnFamilyHandle*>* /*handles*/) {
|
|
return Status::NotSupported("");
|
|
}
|
|
|
|
Status DB::DropColumnFamily(ColumnFamilyHandle* /*column_family*/) {
|
|
return Status::NotSupported("");
|
|
}
|
|
|
|
Status DB::DropColumnFamilies(
|
|
const std::vector<ColumnFamilyHandle*>& /*column_families*/) {
|
|
return Status::NotSupported("");
|
|
}
|
|
|
|
Status DB::DestroyColumnFamilyHandle(ColumnFamilyHandle* column_family) {
|
|
if (DefaultColumnFamily() == column_family) {
|
|
return Status::InvalidArgument(
|
|
"Cannot destroy the handle returned by DefaultColumnFamily()");
|
|
}
|
|
delete column_family;
|
|
return Status::OK();
|
|
}
|
|
|
|
DB::~DB() {}
|
|
|
|
Status DBImpl::Close() {
|
|
InstrumentedMutexLock closing_lock_guard(&closing_mutex_);
|
|
if (closed_) {
|
|
return closing_status_;
|
|
}
|
|
|
|
{
|
|
const Status s = MaybeReleaseTimestampedSnapshotsAndCheck();
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
|
|
closing_status_ = CloseImpl();
|
|
closed_ = true;
|
|
return closing_status_;
|
|
}
|
|
|
|
Status DB::ListColumnFamilies(const DBOptions& db_options,
|
|
const std::string& name,
|
|
std::vector<std::string>* column_families) {
|
|
const std::shared_ptr<FileSystem>& fs = db_options.env->GetFileSystem();
|
|
return VersionSet::ListColumnFamilies(column_families, name, fs.get());
|
|
}
|
|
|
|
Snapshot::~Snapshot() {}
|
|
|
|
Status DestroyDB(const std::string& dbname, const Options& options,
|
|
const std::vector<ColumnFamilyDescriptor>& column_families) {
|
|
ImmutableDBOptions soptions(SanitizeOptions(dbname, options));
|
|
Env* env = soptions.env;
|
|
std::vector<std::string> filenames;
|
|
bool wal_in_db_path = soptions.IsWalDirSameAsDBPath();
|
|
|
|
// Reset the logger because it holds a handle to the
|
|
// log file and prevents cleanup and directory removal
|
|
soptions.info_log.reset();
|
|
IOOptions io_opts;
|
|
// Ignore error in case directory does not exist
|
|
soptions.fs
|
|
->GetChildren(dbname, io_opts, &filenames,
|
|
/*IODebugContext*=*/nullptr)
|
|
.PermitUncheckedError();
|
|
|
|
FileLock* lock;
|
|
const std::string lockname = LockFileName(dbname);
|
|
Status result = env->LockFile(lockname, &lock);
|
|
if (result.ok()) {
|
|
uint64_t number;
|
|
FileType type;
|
|
InfoLogPrefix info_log_prefix(!soptions.db_log_dir.empty(), dbname);
|
|
for (const auto& fname : filenames) {
|
|
if (ParseFileName(fname, &number, info_log_prefix.prefix, &type) &&
|
|
type != kDBLockFile) { // Lock file will be deleted at end
|
|
Status del;
|
|
std::string path_to_delete = dbname + "/" + fname;
|
|
if (type == kMetaDatabase) {
|
|
del = DestroyDB(path_to_delete, options);
|
|
} else if (type == kTableFile || type == kWalFile ||
|
|
type == kBlobFile) {
|
|
del = DeleteDBFile(
|
|
&soptions, path_to_delete, dbname,
|
|
/*force_bg=*/false,
|
|
/*force_fg=*/(type == kWalFile) ? !wal_in_db_path : false);
|
|
} else {
|
|
del = env->DeleteFile(path_to_delete);
|
|
}
|
|
if (!del.ok() && result.ok()) {
|
|
result = del;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::set<std::string> paths;
|
|
for (const DbPath& db_path : options.db_paths) {
|
|
paths.insert(db_path.path);
|
|
}
|
|
for (const ColumnFamilyDescriptor& cf : column_families) {
|
|
for (const DbPath& cf_path : cf.options.cf_paths) {
|
|
paths.insert(cf_path.path);
|
|
}
|
|
}
|
|
|
|
for (const auto& path : paths) {
|
|
if (soptions.fs
|
|
->GetChildren(path, io_opts, &filenames,
|
|
/*IODebugContext*=*/nullptr)
|
|
.ok()) {
|
|
for (const auto& fname : filenames) {
|
|
if (ParseFileName(fname, &number, &type) &&
|
|
(type == kTableFile ||
|
|
type == kBlobFile)) { // Lock file will be deleted at end
|
|
std::string file_path = path + "/" + fname;
|
|
Status del = DeleteDBFile(&soptions, file_path, dbname,
|
|
/*force_bg=*/false, /*force_fg=*/false);
|
|
if (!del.ok() && result.ok()) {
|
|
result = del;
|
|
}
|
|
}
|
|
}
|
|
// TODO: Should we return an error if we cannot delete the directory?
|
|
env->DeleteDir(path).PermitUncheckedError();
|
|
}
|
|
}
|
|
|
|
std::vector<std::string> walDirFiles;
|
|
std::string archivedir = ArchivalDirectory(dbname);
|
|
bool wal_dir_exists = false;
|
|
if (!soptions.IsWalDirSameAsDBPath(dbname)) {
|
|
wal_dir_exists =
|
|
soptions.fs
|
|
->GetChildren(soptions.wal_dir, io_opts, &walDirFiles,
|
|
/*IODebugContext*=*/nullptr)
|
|
.ok();
|
|
archivedir = ArchivalDirectory(soptions.wal_dir);
|
|
}
|
|
|
|
// Archive dir may be inside wal dir or dbname and should be
|
|
// processed and removed before those otherwise we have issues
|
|
// removing them
|
|
std::vector<std::string> archiveFiles;
|
|
if (soptions.fs
|
|
->GetChildren(archivedir, io_opts, &archiveFiles,
|
|
/*IODebugContext*=*/nullptr)
|
|
.ok()) {
|
|
// Delete archival files.
|
|
for (const auto& file : archiveFiles) {
|
|
if (ParseFileName(file, &number, &type) && type == kWalFile) {
|
|
Status del =
|
|
DeleteDBFile(&soptions, archivedir + "/" + file, archivedir,
|
|
/*force_bg=*/false, /*force_fg=*/!wal_in_db_path);
|
|
if (!del.ok() && result.ok()) {
|
|
result = del;
|
|
}
|
|
}
|
|
}
|
|
// Ignore error in case dir contains other files
|
|
env->DeleteDir(archivedir).PermitUncheckedError();
|
|
}
|
|
|
|
// Delete log files in the WAL dir
|
|
if (wal_dir_exists) {
|
|
for (const auto& file : walDirFiles) {
|
|
if (ParseFileName(file, &number, &type) && type == kWalFile) {
|
|
Status del =
|
|
DeleteDBFile(&soptions, LogFileName(soptions.wal_dir, number),
|
|
soptions.wal_dir, /*force_bg=*/false,
|
|
/*force_fg=*/!wal_in_db_path);
|
|
if (!del.ok() && result.ok()) {
|
|
result = del;
|
|
}
|
|
}
|
|
}
|
|
// Ignore error in case dir contains other files
|
|
env->DeleteDir(soptions.wal_dir).PermitUncheckedError();
|
|
}
|
|
|
|
// Ignore error since state is already gone
|
|
env->UnlockFile(lock).PermitUncheckedError();
|
|
env->DeleteFile(lockname).PermitUncheckedError();
|
|
|
|
// sst_file_manager holds a ref to the logger. Make sure the logger is
|
|
// gone before trying to remove the directory.
|
|
soptions.sst_file_manager.reset();
|
|
|
|
// Ignore error in case dir contains other files
|
|
env->DeleteDir(dbname).PermitUncheckedError();
|
|
;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
Status DBImpl::WriteOptionsFile(bool need_mutex_lock,
|
|
bool need_enter_write_thread) {
|
|
#ifndef ROCKSDB_LITE
|
|
WriteThread::Writer w;
|
|
if (need_mutex_lock) {
|
|
mutex_.Lock();
|
|
} else {
|
|
mutex_.AssertHeld();
|
|
}
|
|
if (need_enter_write_thread) {
|
|
write_thread_.EnterUnbatched(&w, &mutex_);
|
|
}
|
|
|
|
std::vector<std::string> cf_names;
|
|
std::vector<ColumnFamilyOptions> cf_opts;
|
|
|
|
// This part requires mutex to protect the column family options
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
if (cfd->IsDropped()) {
|
|
continue;
|
|
}
|
|
cf_names.push_back(cfd->GetName());
|
|
cf_opts.push_back(cfd->GetLatestCFOptions());
|
|
}
|
|
|
|
// Unlock during expensive operations. New writes cannot get here
|
|
// because the single write thread ensures all new writes get queued.
|
|
DBOptions db_options =
|
|
BuildDBOptions(immutable_db_options_, mutable_db_options_);
|
|
mutex_.Unlock();
|
|
|
|
TEST_SYNC_POINT("DBImpl::WriteOptionsFile:1");
|
|
TEST_SYNC_POINT("DBImpl::WriteOptionsFile:2");
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::WriteOptionsFile:PersistOptions",
|
|
&db_options);
|
|
|
|
std::string file_name =
|
|
TempOptionsFileName(GetName(), versions_->NewFileNumber());
|
|
Status s = PersistRocksDBOptions(db_options, cf_names, cf_opts, file_name,
|
|
fs_.get());
|
|
|
|
if (s.ok()) {
|
|
s = RenameTempFileToOptionsFile(file_name);
|
|
}
|
|
// restore lock
|
|
if (!need_mutex_lock) {
|
|
mutex_.Lock();
|
|
}
|
|
if (need_enter_write_thread) {
|
|
write_thread_.ExitUnbatched(&w);
|
|
}
|
|
if (!s.ok()) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"Unnable to persist options -- %s", s.ToString().c_str());
|
|
if (immutable_db_options_.fail_if_options_file_error) {
|
|
return Status::IOError("Unable to persist options.",
|
|
s.ToString().c_str());
|
|
}
|
|
}
|
|
#else
|
|
(void)need_mutex_lock;
|
|
(void)need_enter_write_thread;
|
|
#endif // !ROCKSDB_LITE
|
|
return Status::OK();
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
namespace {
|
|
void DeleteOptionsFilesHelper(const std::map<uint64_t, std::string>& filenames,
|
|
const size_t num_files_to_keep,
|
|
const std::shared_ptr<Logger>& info_log,
|
|
Env* env) {
|
|
if (filenames.size() <= num_files_to_keep) {
|
|
return;
|
|
}
|
|
for (auto iter = std::next(filenames.begin(), num_files_to_keep);
|
|
iter != filenames.end(); ++iter) {
|
|
if (!env->DeleteFile(iter->second).ok()) {
|
|
ROCKS_LOG_WARN(info_log, "Unable to delete options file %s",
|
|
iter->second.c_str());
|
|
}
|
|
}
|
|
}
|
|
} // namespace
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
Status DBImpl::DeleteObsoleteOptionsFiles() {
|
|
#ifndef ROCKSDB_LITE
|
|
std::vector<std::string> filenames;
|
|
// use ordered map to store keep the filenames sorted from the newest
|
|
// to the oldest.
|
|
std::map<uint64_t, std::string> options_filenames;
|
|
Status s;
|
|
IOOptions io_opts;
|
|
io_opts.do_not_recurse = true;
|
|
s = fs_->GetChildren(GetName(), io_opts, &filenames,
|
|
/*IODebugContext*=*/nullptr);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
for (auto& filename : filenames) {
|
|
uint64_t file_number;
|
|
FileType type;
|
|
if (ParseFileName(filename, &file_number, &type) && type == kOptionsFile) {
|
|
options_filenames.insert(
|
|
{std::numeric_limits<uint64_t>::max() - file_number,
|
|
GetName() + "/" + filename});
|
|
}
|
|
}
|
|
|
|
// Keeps the latest 2 Options file
|
|
const size_t kNumOptionsFilesKept = 2;
|
|
DeleteOptionsFilesHelper(options_filenames, kNumOptionsFilesKept,
|
|
immutable_db_options_.info_log, GetEnv());
|
|
return Status::OK();
|
|
#else
|
|
return Status::OK();
|
|
#endif // !ROCKSDB_LITE
|
|
}
|
|
|
|
Status DBImpl::RenameTempFileToOptionsFile(const std::string& file_name) {
|
|
#ifndef ROCKSDB_LITE
|
|
Status s;
|
|
|
|
uint64_t options_file_number = versions_->NewFileNumber();
|
|
std::string options_file_name =
|
|
OptionsFileName(GetName(), options_file_number);
|
|
uint64_t options_file_size = 0;
|
|
s = GetEnv()->GetFileSize(file_name, &options_file_size);
|
|
if (s.ok()) {
|
|
// Retry if the file name happen to conflict with an existing one.
|
|
s = GetEnv()->RenameFile(file_name, options_file_name);
|
|
std::unique_ptr<FSDirectory> dir_obj;
|
|
if (s.ok()) {
|
|
s = fs_->NewDirectory(GetName(), IOOptions(), &dir_obj, nullptr);
|
|
}
|
|
if (s.ok()) {
|
|
s = dir_obj->FsyncWithDirOptions(IOOptions(), nullptr,
|
|
DirFsyncOptions(options_file_name));
|
|
}
|
|
if (s.ok()) {
|
|
Status temp_s = dir_obj->Close(IOOptions(), nullptr);
|
|
// The default Close() could return "NotSupproted" and we bypass it
|
|
// if it is not impelmented. Detailed explanations can be found in
|
|
// db/db_impl/db_impl.h
|
|
if (!temp_s.ok()) {
|
|
if (temp_s.IsNotSupported()) {
|
|
temp_s.PermitUncheckedError();
|
|
} else {
|
|
s = temp_s;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
versions_->options_file_number_ = options_file_number;
|
|
versions_->options_file_size_ = options_file_size;
|
|
}
|
|
|
|
if (0 == disable_delete_obsolete_files_) {
|
|
// TODO: Should we check for errors here?
|
|
DeleteObsoleteOptionsFiles().PermitUncheckedError();
|
|
}
|
|
return s;
|
|
#else
|
|
(void)file_name;
|
|
return Status::OK();
|
|
#endif // !ROCKSDB_LITE
|
|
}
|
|
|
|
#ifdef ROCKSDB_USING_THREAD_STATUS
|
|
|
|
void DBImpl::NewThreadStatusCfInfo(ColumnFamilyData* cfd) const {
|
|
if (immutable_db_options_.enable_thread_tracking) {
|
|
ThreadStatusUtil::NewColumnFamilyInfo(this, cfd, cfd->GetName(),
|
|
cfd->ioptions()->env);
|
|
}
|
|
}
|
|
|
|
void DBImpl::EraseThreadStatusCfInfo(ColumnFamilyData* cfd) const {
|
|
if (immutable_db_options_.enable_thread_tracking) {
|
|
ThreadStatusUtil::EraseColumnFamilyInfo(cfd);
|
|
}
|
|
}
|
|
|
|
void DBImpl::EraseThreadStatusDbInfo() const {
|
|
if (immutable_db_options_.enable_thread_tracking) {
|
|
ThreadStatusUtil::EraseDatabaseInfo(this);
|
|
}
|
|
}
|
|
|
|
#else
|
|
void DBImpl::NewThreadStatusCfInfo(ColumnFamilyData* /*cfd*/) const {}
|
|
|
|
void DBImpl::EraseThreadStatusCfInfo(ColumnFamilyData* /*cfd*/) const {}
|
|
|
|
void DBImpl::EraseThreadStatusDbInfo() const {}
|
|
#endif // ROCKSDB_USING_THREAD_STATUS
|
|
|
|
//
|
|
// A global method that can dump out the build version
|
|
void DumpRocksDBBuildVersion(Logger* log) {
|
|
ROCKS_LOG_HEADER(log, "RocksDB version: %s\n",
|
|
GetRocksVersionAsString().c_str());
|
|
const auto& props = GetRocksBuildProperties();
|
|
const auto& sha = props.find("rocksdb_build_git_sha");
|
|
if (sha != props.end()) {
|
|
ROCKS_LOG_HEADER(log, "Git sha %s", sha->second.c_str());
|
|
}
|
|
const auto date = props.find("rocksdb_build_date");
|
|
if (date != props.end()) {
|
|
ROCKS_LOG_HEADER(log, "Compile date %s", date->second.c_str());
|
|
}
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
SequenceNumber DBImpl::GetEarliestMemTableSequenceNumber(SuperVersion* sv,
|
|
bool include_history) {
|
|
// Find the earliest sequence number that we know we can rely on reading
|
|
// from the memtable without needing to check sst files.
|
|
SequenceNumber earliest_seq =
|
|
sv->imm->GetEarliestSequenceNumber(include_history);
|
|
if (earliest_seq == kMaxSequenceNumber) {
|
|
earliest_seq = sv->mem->GetEarliestSequenceNumber();
|
|
}
|
|
assert(sv->mem->GetEarliestSequenceNumber() >= earliest_seq);
|
|
|
|
return earliest_seq;
|
|
}
|
|
|
|
Status DBImpl::GetLatestSequenceForKey(
|
|
SuperVersion* sv, const Slice& key, bool cache_only,
|
|
SequenceNumber lower_bound_seq, SequenceNumber* seq, std::string* timestamp,
|
|
bool* found_record_for_key, bool* is_blob_index) {
|
|
Status s;
|
|
MergeContext merge_context;
|
|
SequenceNumber max_covering_tombstone_seq = 0;
|
|
|
|
ReadOptions read_options;
|
|
SequenceNumber current_seq = versions_->LastSequence();
|
|
|
|
ColumnFamilyData* cfd = sv->cfd;
|
|
assert(cfd);
|
|
const Comparator* const ucmp = cfd->user_comparator();
|
|
assert(ucmp);
|
|
size_t ts_sz = ucmp->timestamp_size();
|
|
std::string ts_buf;
|
|
if (ts_sz > 0) {
|
|
assert(timestamp);
|
|
ts_buf.assign(ts_sz, '\xff');
|
|
} else {
|
|
assert(!timestamp);
|
|
}
|
|
Slice ts(ts_buf);
|
|
|
|
LookupKey lkey(key, current_seq, ts_sz == 0 ? nullptr : &ts);
|
|
|
|
*seq = kMaxSequenceNumber;
|
|
*found_record_for_key = false;
|
|
|
|
// Check if there is a record for this key in the latest memtable
|
|
sv->mem->Get(lkey, /*value=*/nullptr, /*columns=*/nullptr, timestamp, &s,
|
|
&merge_context, &max_covering_tombstone_seq, seq, read_options,
|
|
false /* immutable_memtable */, nullptr /*read_callback*/,
|
|
is_blob_index);
|
|
|
|
if (!(s.ok() || s.IsNotFound() || s.IsMergeInProgress())) {
|
|
// unexpected error reading memtable.
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"Unexpected status returned from MemTable::Get: %s\n",
|
|
s.ToString().c_str());
|
|
|
|
return s;
|
|
}
|
|
assert(!ts_sz ||
|
|
(*seq != kMaxSequenceNumber &&
|
|
*timestamp != std::string(ts_sz, '\xff')) ||
|
|
(*seq == kMaxSequenceNumber && timestamp->empty()));
|
|
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::GetLatestSequenceForKey:mem", timestamp);
|
|
|
|
if (*seq != kMaxSequenceNumber) {
|
|
// Found a sequence number, no need to check immutable memtables
|
|
*found_record_for_key = true;
|
|
return Status::OK();
|
|
}
|
|
|
|
SequenceNumber lower_bound_in_mem = sv->mem->GetEarliestSequenceNumber();
|
|
if (lower_bound_in_mem != kMaxSequenceNumber &&
|
|
lower_bound_in_mem < lower_bound_seq) {
|
|
*found_record_for_key = false;
|
|
return Status::OK();
|
|
}
|
|
|
|
// Check if there is a record for this key in the immutable memtables
|
|
sv->imm->Get(lkey, /*value=*/nullptr, /*columns=*/nullptr, timestamp, &s,
|
|
&merge_context, &max_covering_tombstone_seq, seq, read_options,
|
|
nullptr /*read_callback*/, is_blob_index);
|
|
|
|
if (!(s.ok() || s.IsNotFound() || s.IsMergeInProgress())) {
|
|
// unexpected error reading memtable.
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"Unexpected status returned from MemTableList::Get: %s\n",
|
|
s.ToString().c_str());
|
|
|
|
return s;
|
|
}
|
|
|
|
assert(!ts_sz ||
|
|
(*seq != kMaxSequenceNumber &&
|
|
*timestamp != std::string(ts_sz, '\xff')) ||
|
|
(*seq == kMaxSequenceNumber && timestamp->empty()));
|
|
|
|
if (*seq != kMaxSequenceNumber) {
|
|
// Found a sequence number, no need to check memtable history
|
|
*found_record_for_key = true;
|
|
return Status::OK();
|
|
}
|
|
|
|
SequenceNumber lower_bound_in_imm = sv->imm->GetEarliestSequenceNumber();
|
|
if (lower_bound_in_imm != kMaxSequenceNumber &&
|
|
lower_bound_in_imm < lower_bound_seq) {
|
|
*found_record_for_key = false;
|
|
return Status::OK();
|
|
}
|
|
|
|
// Check if there is a record for this key in the immutable memtables
|
|
sv->imm->GetFromHistory(lkey, /*value=*/nullptr, /*columns=*/nullptr,
|
|
timestamp, &s, &merge_context,
|
|
&max_covering_tombstone_seq, seq, read_options,
|
|
is_blob_index);
|
|
|
|
if (!(s.ok() || s.IsNotFound() || s.IsMergeInProgress())) {
|
|
// unexpected error reading memtable.
|
|
ROCKS_LOG_ERROR(
|
|
immutable_db_options_.info_log,
|
|
"Unexpected status returned from MemTableList::GetFromHistory: %s\n",
|
|
s.ToString().c_str());
|
|
|
|
return s;
|
|
}
|
|
|
|
assert(!ts_sz ||
|
|
(*seq != kMaxSequenceNumber &&
|
|
*timestamp != std::string(ts_sz, '\xff')) ||
|
|
(*seq == kMaxSequenceNumber && timestamp->empty()));
|
|
|
|
if (*seq != kMaxSequenceNumber) {
|
|
// Found a sequence number, no need to check SST files
|
|
assert(0 == ts_sz || *timestamp != std::string(ts_sz, '\xff'));
|
|
*found_record_for_key = true;
|
|
return Status::OK();
|
|
}
|
|
|
|
// We could do a sv->imm->GetEarliestSequenceNumber(/*include_history*/ true)
|
|
// check here to skip the history if possible. But currently the caller
|
|
// already does that. Maybe we should move the logic here later.
|
|
|
|
// TODO(agiardullo): possible optimization: consider checking cached
|
|
// SST files if cache_only=true?
|
|
if (!cache_only) {
|
|
// Check tables
|
|
PinnedIteratorsManager pinned_iters_mgr;
|
|
sv->current->Get(read_options, lkey, /*value=*/nullptr, /*columns=*/nullptr,
|
|
timestamp, &s, &merge_context, &max_covering_tombstone_seq,
|
|
&pinned_iters_mgr, nullptr /* value_found */,
|
|
found_record_for_key, seq, nullptr /*read_callback*/,
|
|
is_blob_index);
|
|
|
|
if (!(s.ok() || s.IsNotFound() || s.IsMergeInProgress())) {
|
|
// unexpected error reading SST files
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"Unexpected status returned from Version::Get: %s\n",
|
|
s.ToString().c_str());
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::IngestExternalFile(
|
|
ColumnFamilyHandle* column_family,
|
|
const std::vector<std::string>& external_files,
|
|
const IngestExternalFileOptions& ingestion_options) {
|
|
IngestExternalFileArg arg;
|
|
arg.column_family = column_family;
|
|
arg.external_files = external_files;
|
|
arg.options = ingestion_options;
|
|
return IngestExternalFiles({arg});
|
|
}
|
|
|
|
Status DBImpl::IngestExternalFiles(
|
|
const std::vector<IngestExternalFileArg>& args) {
|
|
if (args.empty()) {
|
|
return Status::InvalidArgument("ingestion arg list is empty");
|
|
}
|
|
{
|
|
std::unordered_set<ColumnFamilyHandle*> unique_cfhs;
|
|
for (const auto& arg : args) {
|
|
if (arg.column_family == nullptr) {
|
|
return Status::InvalidArgument("column family handle is null");
|
|
} else if (unique_cfhs.count(arg.column_family) > 0) {
|
|
return Status::InvalidArgument(
|
|
"ingestion args have duplicate column families");
|
|
}
|
|
unique_cfhs.insert(arg.column_family);
|
|
}
|
|
}
|
|
// Ingest multiple external SST files atomically.
|
|
const size_t num_cfs = args.size();
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
if (args[i].external_files.empty()) {
|
|
char err_msg[128] = {0};
|
|
snprintf(err_msg, 128, "external_files[%zu] is empty", i);
|
|
return Status::InvalidArgument(err_msg);
|
|
}
|
|
}
|
|
for (const auto& arg : args) {
|
|
const IngestExternalFileOptions& ingest_opts = arg.options;
|
|
if (ingest_opts.ingest_behind &&
|
|
!immutable_db_options_.allow_ingest_behind) {
|
|
return Status::InvalidArgument(
|
|
"can't ingest_behind file in DB with allow_ingest_behind=false");
|
|
}
|
|
}
|
|
|
|
// TODO (yanqin) maybe handle the case in which column_families have
|
|
// duplicates
|
|
std::unique_ptr<std::list<uint64_t>::iterator> pending_output_elem;
|
|
size_t total = 0;
|
|
for (const auto& arg : args) {
|
|
total += arg.external_files.size();
|
|
}
|
|
uint64_t next_file_number = 0;
|
|
Status status = ReserveFileNumbersBeforeIngestion(
|
|
static_cast<ColumnFamilyHandleImpl*>(args[0].column_family)->cfd(), total,
|
|
pending_output_elem, &next_file_number);
|
|
if (!status.ok()) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
ReleaseFileNumberFromPendingOutputs(pending_output_elem);
|
|
return status;
|
|
}
|
|
|
|
std::vector<ExternalSstFileIngestionJob> ingestion_jobs;
|
|
for (const auto& arg : args) {
|
|
auto* cfd = static_cast<ColumnFamilyHandleImpl*>(arg.column_family)->cfd();
|
|
ingestion_jobs.emplace_back(versions_.get(), cfd, immutable_db_options_,
|
|
file_options_, &snapshots_, arg.options,
|
|
&directories_, &event_logger_, io_tracer_);
|
|
}
|
|
|
|
// TODO(yanqin) maybe make jobs run in parallel
|
|
uint64_t start_file_number = next_file_number;
|
|
for (size_t i = 1; i != num_cfs; ++i) {
|
|
start_file_number += args[i - 1].external_files.size();
|
|
auto* cfd =
|
|
static_cast<ColumnFamilyHandleImpl*>(args[i].column_family)->cfd();
|
|
SuperVersion* super_version = cfd->GetReferencedSuperVersion(this);
|
|
Status es = ingestion_jobs[i].Prepare(
|
|
args[i].external_files, args[i].files_checksums,
|
|
args[i].files_checksum_func_names, args[i].file_temperature,
|
|
start_file_number, super_version);
|
|
// capture first error only
|
|
if (!es.ok() && status.ok()) {
|
|
status = es;
|
|
}
|
|
CleanupSuperVersion(super_version);
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::IngestExternalFiles:BeforeLastJobPrepare:0");
|
|
TEST_SYNC_POINT("DBImpl::IngestExternalFiles:BeforeLastJobPrepare:1");
|
|
{
|
|
auto* cfd =
|
|
static_cast<ColumnFamilyHandleImpl*>(args[0].column_family)->cfd();
|
|
SuperVersion* super_version = cfd->GetReferencedSuperVersion(this);
|
|
Status es = ingestion_jobs[0].Prepare(
|
|
args[0].external_files, args[0].files_checksums,
|
|
args[0].files_checksum_func_names, args[0].file_temperature,
|
|
next_file_number, super_version);
|
|
if (!es.ok()) {
|
|
status = es;
|
|
}
|
|
CleanupSuperVersion(super_version);
|
|
}
|
|
if (!status.ok()) {
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
ingestion_jobs[i].Cleanup(status);
|
|
}
|
|
InstrumentedMutexLock l(&mutex_);
|
|
ReleaseFileNumberFromPendingOutputs(pending_output_elem);
|
|
return status;
|
|
}
|
|
|
|
std::vector<SuperVersionContext> sv_ctxs;
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
sv_ctxs.emplace_back(true /* create_superversion */);
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::IngestExternalFiles:BeforeJobsRun:0");
|
|
TEST_SYNC_POINT("DBImpl::IngestExternalFiles:BeforeJobsRun:1");
|
|
TEST_SYNC_POINT("DBImpl::AddFile:Start");
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
TEST_SYNC_POINT("DBImpl::AddFile:MutexLock");
|
|
|
|
// Stop writes to the DB by entering both write threads
|
|
WriteThread::Writer w;
|
|
write_thread_.EnterUnbatched(&w, &mutex_);
|
|
WriteThread::Writer nonmem_w;
|
|
if (two_write_queues_) {
|
|
nonmem_write_thread_.EnterUnbatched(&nonmem_w, &mutex_);
|
|
}
|
|
|
|
// When unordered_write is enabled, the keys are writing to memtable in an
|
|
// unordered way. If the ingestion job checks memtable key range before the
|
|
// key landing in memtable, the ingestion job may skip the necessary
|
|
// memtable flush.
|
|
// So wait here to ensure there is no pending write to memtable.
|
|
WaitForPendingWrites();
|
|
|
|
num_running_ingest_file_ += static_cast<int>(num_cfs);
|
|
TEST_SYNC_POINT("DBImpl::IngestExternalFile:AfterIncIngestFileCounter");
|
|
|
|
bool at_least_one_cf_need_flush = false;
|
|
std::vector<bool> need_flush(num_cfs, false);
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
auto* cfd =
|
|
static_cast<ColumnFamilyHandleImpl*>(args[i].column_family)->cfd();
|
|
if (cfd->IsDropped()) {
|
|
// TODO (yanqin) investigate whether we should abort ingestion or
|
|
// proceed with other non-dropped column families.
|
|
status = Status::InvalidArgument(
|
|
"cannot ingest an external file into a dropped CF");
|
|
break;
|
|
}
|
|
bool tmp = false;
|
|
status = ingestion_jobs[i].NeedsFlush(&tmp, cfd->GetSuperVersion());
|
|
need_flush[i] = tmp;
|
|
at_least_one_cf_need_flush = (at_least_one_cf_need_flush || tmp);
|
|
if (!status.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::IngestExternalFile:NeedFlush",
|
|
&at_least_one_cf_need_flush);
|
|
|
|
if (status.ok() && at_least_one_cf_need_flush) {
|
|
FlushOptions flush_opts;
|
|
flush_opts.allow_write_stall = true;
|
|
if (immutable_db_options_.atomic_flush) {
|
|
autovector<ColumnFamilyData*> cfds_to_flush;
|
|
SelectColumnFamiliesForAtomicFlush(&cfds_to_flush);
|
|
mutex_.Unlock();
|
|
status = AtomicFlushMemTables(cfds_to_flush, flush_opts,
|
|
FlushReason::kExternalFileIngestion,
|
|
true /* entered_write_thread */);
|
|
mutex_.Lock();
|
|
} else {
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
if (need_flush[i]) {
|
|
mutex_.Unlock();
|
|
auto* cfd =
|
|
static_cast<ColumnFamilyHandleImpl*>(args[i].column_family)
|
|
->cfd();
|
|
status = FlushMemTable(cfd, flush_opts,
|
|
FlushReason::kExternalFileIngestion,
|
|
true /* entered_write_thread */);
|
|
mutex_.Lock();
|
|
if (!status.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Run ingestion jobs.
|
|
if (status.ok()) {
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
status = ingestion_jobs[i].Run();
|
|
if (!status.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (status.ok()) {
|
|
autovector<ColumnFamilyData*> cfds_to_commit;
|
|
autovector<const MutableCFOptions*> mutable_cf_options_list;
|
|
autovector<autovector<VersionEdit*>> edit_lists;
|
|
uint32_t num_entries = 0;
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
auto* cfd =
|
|
static_cast<ColumnFamilyHandleImpl*>(args[i].column_family)->cfd();
|
|
if (cfd->IsDropped()) {
|
|
continue;
|
|
}
|
|
cfds_to_commit.push_back(cfd);
|
|
mutable_cf_options_list.push_back(cfd->GetLatestMutableCFOptions());
|
|
autovector<VersionEdit*> edit_list;
|
|
edit_list.push_back(ingestion_jobs[i].edit());
|
|
edit_lists.push_back(edit_list);
|
|
++num_entries;
|
|
}
|
|
// Mark the version edits as an atomic group if the number of version
|
|
// edits exceeds 1.
|
|
if (cfds_to_commit.size() > 1) {
|
|
for (auto& edits : edit_lists) {
|
|
assert(edits.size() == 1);
|
|
edits[0]->MarkAtomicGroup(--num_entries);
|
|
}
|
|
assert(0 == num_entries);
|
|
}
|
|
status =
|
|
versions_->LogAndApply(cfds_to_commit, mutable_cf_options_list,
|
|
edit_lists, &mutex_, directories_.GetDbDir());
|
|
// It is safe to update VersionSet last seqno here after LogAndApply since
|
|
// LogAndApply persists last sequence number from VersionEdits,
|
|
// which are from file's largest seqno and not from VersionSet.
|
|
//
|
|
// It is necessary to update last seqno here since LogAndApply releases
|
|
// mutex when persisting MANIFEST file, and the snapshots taken during
|
|
// that period will not be stable if VersionSet last seqno is updated
|
|
// before LogAndApply.
|
|
int consumed_seqno_count =
|
|
ingestion_jobs[0].ConsumedSequenceNumbersCount();
|
|
for (size_t i = 1; i != num_cfs; ++i) {
|
|
consumed_seqno_count =
|
|
std::max(consumed_seqno_count,
|
|
ingestion_jobs[i].ConsumedSequenceNumbersCount());
|
|
}
|
|
if (consumed_seqno_count > 0) {
|
|
const SequenceNumber last_seqno = versions_->LastSequence();
|
|
versions_->SetLastAllocatedSequence(last_seqno + consumed_seqno_count);
|
|
versions_->SetLastPublishedSequence(last_seqno + consumed_seqno_count);
|
|
versions_->SetLastSequence(last_seqno + consumed_seqno_count);
|
|
}
|
|
}
|
|
|
|
if (status.ok()) {
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
auto* cfd =
|
|
static_cast<ColumnFamilyHandleImpl*>(args[i].column_family)->cfd();
|
|
if (!cfd->IsDropped()) {
|
|
InstallSuperVersionAndScheduleWork(cfd, &sv_ctxs[i],
|
|
*cfd->GetLatestMutableCFOptions());
|
|
#ifndef NDEBUG
|
|
if (0 == i && num_cfs > 1) {
|
|
TEST_SYNC_POINT(
|
|
"DBImpl::IngestExternalFiles:InstallSVForFirstCF:0");
|
|
TEST_SYNC_POINT(
|
|
"DBImpl::IngestExternalFiles:InstallSVForFirstCF:1");
|
|
}
|
|
#endif // !NDEBUG
|
|
}
|
|
}
|
|
} else if (versions_->io_status().IsIOError()) {
|
|
// Error while writing to MANIFEST.
|
|
// In fact, versions_->io_status() can also be the result of renaming
|
|
// CURRENT file. With current code, it's just difficult to tell. So just
|
|
// be pessimistic and try write to a new MANIFEST.
|
|
// TODO: distinguish between MANIFEST write and CURRENT renaming
|
|
const IOStatus& io_s = versions_->io_status();
|
|
// Should handle return error?
|
|
error_handler_.SetBGError(io_s, BackgroundErrorReason::kManifestWrite);
|
|
}
|
|
|
|
// Resume writes to the DB
|
|
if (two_write_queues_) {
|
|
nonmem_write_thread_.ExitUnbatched(&nonmem_w);
|
|
}
|
|
write_thread_.ExitUnbatched(&w);
|
|
|
|
if (status.ok()) {
|
|
for (auto& job : ingestion_jobs) {
|
|
job.UpdateStats();
|
|
}
|
|
}
|
|
ReleaseFileNumberFromPendingOutputs(pending_output_elem);
|
|
num_running_ingest_file_ -= static_cast<int>(num_cfs);
|
|
if (0 == num_running_ingest_file_) {
|
|
bg_cv_.SignalAll();
|
|
}
|
|
TEST_SYNC_POINT("DBImpl::AddFile:MutexUnlock");
|
|
}
|
|
// mutex_ is unlocked here
|
|
|
|
// Cleanup
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
sv_ctxs[i].Clean();
|
|
// This may rollback jobs that have completed successfully. This is
|
|
// intended for atomicity.
|
|
ingestion_jobs[i].Cleanup(status);
|
|
}
|
|
if (status.ok()) {
|
|
for (size_t i = 0; i != num_cfs; ++i) {
|
|
auto* cfd =
|
|
static_cast<ColumnFamilyHandleImpl*>(args[i].column_family)->cfd();
|
|
if (!cfd->IsDropped()) {
|
|
NotifyOnExternalFileIngested(cfd, ingestion_jobs[i]);
|
|
}
|
|
}
|
|
}
|
|
return status;
|
|
}
|
|
|
|
Status DBImpl::CreateColumnFamilyWithImport(
|
|
const ColumnFamilyOptions& options, const std::string& column_family_name,
|
|
const ImportColumnFamilyOptions& import_options,
|
|
const ExportImportFilesMetaData& metadata, ColumnFamilyHandle** handle) {
|
|
assert(handle != nullptr);
|
|
assert(*handle == nullptr);
|
|
std::string cf_comparator_name = options.comparator->Name();
|
|
if (cf_comparator_name != metadata.db_comparator_name) {
|
|
return Status::InvalidArgument("Comparator name mismatch");
|
|
}
|
|
|
|
// Create column family.
|
|
auto status = CreateColumnFamily(options, column_family_name, handle);
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
|
|
// Import sst files from metadata.
|
|
auto cfh = static_cast_with_check<ColumnFamilyHandleImpl>(*handle);
|
|
auto cfd = cfh->cfd();
|
|
ImportColumnFamilyJob import_job(versions_.get(), cfd, immutable_db_options_,
|
|
file_options_, import_options,
|
|
metadata.files, io_tracer_);
|
|
|
|
SuperVersionContext dummy_sv_ctx(/* create_superversion */ true);
|
|
VersionEdit dummy_edit;
|
|
uint64_t next_file_number = 0;
|
|
std::unique_ptr<std::list<uint64_t>::iterator> pending_output_elem;
|
|
{
|
|
// Lock db mutex
|
|
InstrumentedMutexLock l(&mutex_);
|
|
if (error_handler_.IsDBStopped()) {
|
|
// Don't import files when there is a bg_error
|
|
status = error_handler_.GetBGError();
|
|
}
|
|
|
|
// Make sure that bg cleanup wont delete the files that we are importing
|
|
pending_output_elem.reset(new std::list<uint64_t>::iterator(
|
|
CaptureCurrentFileNumberInPendingOutputs()));
|
|
|
|
if (status.ok()) {
|
|
// If crash happen after a hard link established, Recover function may
|
|
// reuse the file number that has already assigned to the internal file,
|
|
// and this will overwrite the external file. To protect the external
|
|
// file, we have to make sure the file number will never being reused.
|
|
next_file_number = versions_->FetchAddFileNumber(metadata.files.size());
|
|
auto cf_options = cfd->GetLatestMutableCFOptions();
|
|
status = versions_->LogAndApply(cfd, *cf_options, &dummy_edit, &mutex_,
|
|
directories_.GetDbDir());
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWork(cfd, &dummy_sv_ctx, *cf_options);
|
|
}
|
|
}
|
|
}
|
|
dummy_sv_ctx.Clean();
|
|
|
|
if (status.ok()) {
|
|
SuperVersion* sv = cfd->GetReferencedSuperVersion(this);
|
|
status = import_job.Prepare(next_file_number, sv);
|
|
CleanupSuperVersion(sv);
|
|
}
|
|
|
|
if (status.ok()) {
|
|
SuperVersionContext sv_context(true /*create_superversion*/);
|
|
{
|
|
// Lock db mutex
|
|
InstrumentedMutexLock l(&mutex_);
|
|
|
|
// Stop writes to the DB by entering both write threads
|
|
WriteThread::Writer w;
|
|
write_thread_.EnterUnbatched(&w, &mutex_);
|
|
WriteThread::Writer nonmem_w;
|
|
if (two_write_queues_) {
|
|
nonmem_write_thread_.EnterUnbatched(&nonmem_w, &mutex_);
|
|
}
|
|
|
|
num_running_ingest_file_++;
|
|
assert(!cfd->IsDropped());
|
|
status = import_job.Run();
|
|
|
|
// Install job edit [Mutex will be unlocked here]
|
|
if (status.ok()) {
|
|
auto cf_options = cfd->GetLatestMutableCFOptions();
|
|
status = versions_->LogAndApply(cfd, *cf_options, import_job.edit(),
|
|
&mutex_, directories_.GetDbDir());
|
|
if (status.ok()) {
|
|
InstallSuperVersionAndScheduleWork(cfd, &sv_context, *cf_options);
|
|
}
|
|
}
|
|
|
|
// Resume writes to the DB
|
|
if (two_write_queues_) {
|
|
nonmem_write_thread_.ExitUnbatched(&nonmem_w);
|
|
}
|
|
write_thread_.ExitUnbatched(&w);
|
|
|
|
num_running_ingest_file_--;
|
|
if (num_running_ingest_file_ == 0) {
|
|
bg_cv_.SignalAll();
|
|
}
|
|
}
|
|
// mutex_ is unlocked here
|
|
|
|
sv_context.Clean();
|
|
}
|
|
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
ReleaseFileNumberFromPendingOutputs(pending_output_elem);
|
|
}
|
|
|
|
import_job.Cleanup(status);
|
|
if (!status.ok()) {
|
|
Status temp_s = DropColumnFamily(*handle);
|
|
if (!temp_s.ok()) {
|
|
ROCKS_LOG_ERROR(immutable_db_options_.info_log,
|
|
"DropColumnFamily failed with error %s",
|
|
temp_s.ToString().c_str());
|
|
}
|
|
// Always returns Status::OK()
|
|
temp_s = DestroyColumnFamilyHandle(*handle);
|
|
assert(temp_s.ok());
|
|
*handle = nullptr;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
Status DBImpl::VerifyFileChecksums(const ReadOptions& read_options) {
|
|
return VerifyChecksumInternal(read_options, /*use_file_checksum=*/true);
|
|
}
|
|
|
|
Status DBImpl::VerifyChecksum(const ReadOptions& read_options) {
|
|
return VerifyChecksumInternal(read_options, /*use_file_checksum=*/false);
|
|
}
|
|
|
|
Status DBImpl::VerifyChecksumInternal(const ReadOptions& read_options,
|
|
bool use_file_checksum) {
|
|
// `bytes_read` stat is enabled based on compile-time support and cannot
|
|
// be dynamically toggled. So we do not need to worry about `PerfLevel`
|
|
// here, unlike many other `IOStatsContext` / `PerfContext` stats.
|
|
uint64_t prev_bytes_read = IOSTATS(bytes_read);
|
|
|
|
Status s;
|
|
|
|
if (use_file_checksum) {
|
|
FileChecksumGenFactory* const file_checksum_gen_factory =
|
|
immutable_db_options_.file_checksum_gen_factory.get();
|
|
if (!file_checksum_gen_factory) {
|
|
s = Status::InvalidArgument(
|
|
"Cannot verify file checksum if options.file_checksum_gen_factory is "
|
|
"null");
|
|
return s;
|
|
}
|
|
}
|
|
|
|
// TODO: simplify using GetRefedColumnFamilySet?
|
|
std::vector<ColumnFamilyData*> cfd_list;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
if (!cfd->IsDropped() && cfd->initialized()) {
|
|
cfd->Ref();
|
|
cfd_list.push_back(cfd);
|
|
}
|
|
}
|
|
}
|
|
std::vector<SuperVersion*> sv_list;
|
|
for (auto cfd : cfd_list) {
|
|
sv_list.push_back(cfd->GetReferencedSuperVersion(this));
|
|
}
|
|
|
|
for (auto& sv : sv_list) {
|
|
VersionStorageInfo* vstorage = sv->current->storage_info();
|
|
ColumnFamilyData* cfd = sv->current->cfd();
|
|
Options opts;
|
|
if (!use_file_checksum) {
|
|
InstrumentedMutexLock l(&mutex_);
|
|
opts = Options(BuildDBOptions(immutable_db_options_, mutable_db_options_),
|
|
cfd->GetLatestCFOptions());
|
|
}
|
|
for (int i = 0; i < vstorage->num_non_empty_levels() && s.ok(); i++) {
|
|
for (size_t j = 0; j < vstorage->LevelFilesBrief(i).num_files && s.ok();
|
|
j++) {
|
|
const auto& fd_with_krange = vstorage->LevelFilesBrief(i).files[j];
|
|
const auto& fd = fd_with_krange.fd;
|
|
const FileMetaData* fmeta = fd_with_krange.file_metadata;
|
|
assert(fmeta);
|
|
std::string fname = TableFileName(cfd->ioptions()->cf_paths,
|
|
fd.GetNumber(), fd.GetPathId());
|
|
if (use_file_checksum) {
|
|
s = VerifyFullFileChecksum(fmeta->file_checksum,
|
|
fmeta->file_checksum_func_name, fname,
|
|
read_options);
|
|
} else {
|
|
s = ROCKSDB_NAMESPACE::VerifySstFileChecksum(
|
|
opts, file_options_, read_options, fname, fd.largest_seqno);
|
|
}
|
|
RecordTick(stats_, VERIFY_CHECKSUM_READ_BYTES,
|
|
IOSTATS(bytes_read) - prev_bytes_read);
|
|
prev_bytes_read = IOSTATS(bytes_read);
|
|
}
|
|
}
|
|
|
|
if (s.ok() && use_file_checksum) {
|
|
const auto& blob_files = vstorage->GetBlobFiles();
|
|
for (const auto& meta : blob_files) {
|
|
assert(meta);
|
|
|
|
const uint64_t blob_file_number = meta->GetBlobFileNumber();
|
|
|
|
const std::string blob_file_name = BlobFileName(
|
|
cfd->ioptions()->cf_paths.front().path, blob_file_number);
|
|
s = VerifyFullFileChecksum(meta->GetChecksumValue(),
|
|
meta->GetChecksumMethod(), blob_file_name,
|
|
read_options);
|
|
RecordTick(stats_, VERIFY_CHECKSUM_READ_BYTES,
|
|
IOSTATS(bytes_read) - prev_bytes_read);
|
|
prev_bytes_read = IOSTATS(bytes_read);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
bool defer_purge = immutable_db_options().avoid_unnecessary_blocking_io;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
for (auto sv : sv_list) {
|
|
if (sv && sv->Unref()) {
|
|
sv->Cleanup();
|
|
if (defer_purge) {
|
|
AddSuperVersionsToFreeQueue(sv);
|
|
} else {
|
|
delete sv;
|
|
}
|
|
}
|
|
}
|
|
if (defer_purge) {
|
|
SchedulePurge();
|
|
}
|
|
for (auto cfd : cfd_list) {
|
|
cfd->UnrefAndTryDelete();
|
|
}
|
|
}
|
|
RecordTick(stats_, VERIFY_CHECKSUM_READ_BYTES,
|
|
IOSTATS(bytes_read) - prev_bytes_read);
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::VerifyFullFileChecksum(const std::string& file_checksum_expected,
|
|
const std::string& func_name_expected,
|
|
const std::string& fname,
|
|
const ReadOptions& read_options) {
|
|
Status s;
|
|
if (file_checksum_expected == kUnknownFileChecksum) {
|
|
return s;
|
|
}
|
|
std::string file_checksum;
|
|
std::string func_name;
|
|
s = ROCKSDB_NAMESPACE::GenerateOneFileChecksum(
|
|
fs_.get(), fname, immutable_db_options_.file_checksum_gen_factory.get(),
|
|
func_name_expected, &file_checksum, &func_name,
|
|
read_options.readahead_size, immutable_db_options_.allow_mmap_reads,
|
|
io_tracer_, immutable_db_options_.rate_limiter.get(),
|
|
read_options.rate_limiter_priority);
|
|
if (s.ok()) {
|
|
assert(func_name_expected == func_name);
|
|
if (file_checksum != file_checksum_expected) {
|
|
std::ostringstream oss;
|
|
oss << fname << " file checksum mismatch, ";
|
|
oss << "expecting "
|
|
<< Slice(file_checksum_expected).ToString(/*hex=*/true);
|
|
oss << ", but actual " << Slice(file_checksum).ToString(/*hex=*/true);
|
|
s = Status::Corruption(oss.str());
|
|
TEST_SYNC_POINT_CALLBACK("DBImpl::VerifyFullFileChecksum:mismatch", &s);
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
void DBImpl::NotifyOnExternalFileIngested(
|
|
ColumnFamilyData* cfd, const ExternalSstFileIngestionJob& ingestion_job) {
|
|
if (immutable_db_options_.listeners.empty()) {
|
|
return;
|
|
}
|
|
|
|
for (const IngestedFileInfo& f : ingestion_job.files_to_ingest()) {
|
|
ExternalFileIngestionInfo info;
|
|
info.cf_name = cfd->GetName();
|
|
info.external_file_path = f.external_file_path;
|
|
info.internal_file_path = f.internal_file_path;
|
|
info.global_seqno = f.assigned_seqno;
|
|
info.table_properties = f.table_properties;
|
|
for (auto listener : immutable_db_options_.listeners) {
|
|
listener->OnExternalFileIngested(this, info);
|
|
}
|
|
}
|
|
}
|
|
|
|
void DBImpl::WaitForIngestFile() {
|
|
mutex_.AssertHeld();
|
|
while (num_running_ingest_file_ > 0) {
|
|
bg_cv_.Wait();
|
|
}
|
|
}
|
|
|
|
Status DBImpl::StartTrace(const TraceOptions& trace_options,
|
|
std::unique_ptr<TraceWriter>&& trace_writer) {
|
|
InstrumentedMutexLock lock(&trace_mutex_);
|
|
tracer_.reset(new Tracer(immutable_db_options_.clock, trace_options,
|
|
std::move(trace_writer)));
|
|
return Status::OK();
|
|
}
|
|
|
|
Status DBImpl::EndTrace() {
|
|
InstrumentedMutexLock lock(&trace_mutex_);
|
|
Status s;
|
|
if (tracer_ != nullptr) {
|
|
s = tracer_->Close();
|
|
tracer_.reset();
|
|
} else {
|
|
s = Status::IOError("No trace file to close");
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::NewDefaultReplayer(
|
|
const std::vector<ColumnFamilyHandle*>& handles,
|
|
std::unique_ptr<TraceReader>&& reader,
|
|
std::unique_ptr<Replayer>* replayer) {
|
|
replayer->reset(new ReplayerImpl(this, handles, std::move(reader)));
|
|
return Status::OK();
|
|
}
|
|
|
|
Status DBImpl::StartBlockCacheTrace(
|
|
const TraceOptions& trace_options,
|
|
std::unique_ptr<TraceWriter>&& trace_writer) {
|
|
BlockCacheTraceOptions block_trace_opts;
|
|
block_trace_opts.sampling_frequency = trace_options.sampling_frequency;
|
|
|
|
BlockCacheTraceWriterOptions trace_writer_opt;
|
|
trace_writer_opt.max_trace_file_size = trace_options.max_trace_file_size;
|
|
|
|
std::unique_ptr<BlockCacheTraceWriter> block_cache_trace_writer =
|
|
NewBlockCacheTraceWriter(env_->GetSystemClock().get(), trace_writer_opt,
|
|
std::move(trace_writer));
|
|
|
|
return block_cache_tracer_.StartTrace(block_trace_opts,
|
|
std::move(block_cache_trace_writer));
|
|
}
|
|
|
|
Status DBImpl::StartBlockCacheTrace(
|
|
const BlockCacheTraceOptions& trace_options,
|
|
std::unique_ptr<BlockCacheTraceWriter>&& trace_writer) {
|
|
return block_cache_tracer_.StartTrace(trace_options, std::move(trace_writer));
|
|
}
|
|
|
|
Status DBImpl::EndBlockCacheTrace() {
|
|
block_cache_tracer_.EndTrace();
|
|
return Status::OK();
|
|
}
|
|
|
|
Status DBImpl::TraceIteratorSeek(const uint32_t& cf_id, const Slice& key,
|
|
const Slice& lower_bound,
|
|
const Slice upper_bound) {
|
|
Status s;
|
|
if (tracer_) {
|
|
InstrumentedMutexLock lock(&trace_mutex_);
|
|
if (tracer_) {
|
|
s = tracer_->IteratorSeek(cf_id, key, lower_bound, upper_bound);
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::TraceIteratorSeekForPrev(const uint32_t& cf_id, const Slice& key,
|
|
const Slice& lower_bound,
|
|
const Slice upper_bound) {
|
|
Status s;
|
|
if (tracer_) {
|
|
InstrumentedMutexLock lock(&trace_mutex_);
|
|
if (tracer_) {
|
|
s = tracer_->IteratorSeekForPrev(cf_id, key, lower_bound, upper_bound);
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::ReserveFileNumbersBeforeIngestion(
|
|
ColumnFamilyData* cfd, uint64_t num,
|
|
std::unique_ptr<std::list<uint64_t>::iterator>& pending_output_elem,
|
|
uint64_t* next_file_number) {
|
|
Status s;
|
|
SuperVersionContext dummy_sv_ctx(true /* create_superversion */);
|
|
assert(nullptr != next_file_number);
|
|
InstrumentedMutexLock l(&mutex_);
|
|
if (error_handler_.IsDBStopped()) {
|
|
// Do not ingest files when there is a bg_error
|
|
return error_handler_.GetBGError();
|
|
}
|
|
pending_output_elem.reset(new std::list<uint64_t>::iterator(
|
|
CaptureCurrentFileNumberInPendingOutputs()));
|
|
*next_file_number = versions_->FetchAddFileNumber(static_cast<uint64_t>(num));
|
|
auto cf_options = cfd->GetLatestMutableCFOptions();
|
|
VersionEdit dummy_edit;
|
|
// If crash happen after a hard link established, Recover function may
|
|
// reuse the file number that has already assigned to the internal file,
|
|
// and this will overwrite the external file. To protect the external
|
|
// file, we have to make sure the file number will never being reused.
|
|
s = versions_->LogAndApply(cfd, *cf_options, &dummy_edit, &mutex_,
|
|
directories_.GetDbDir());
|
|
if (s.ok()) {
|
|
InstallSuperVersionAndScheduleWork(cfd, &dummy_sv_ctx, *cf_options);
|
|
}
|
|
dummy_sv_ctx.Clean();
|
|
return s;
|
|
}
|
|
|
|
Status DBImpl::GetCreationTimeOfOldestFile(uint64_t* creation_time) {
|
|
if (mutable_db_options_.max_open_files == -1) {
|
|
uint64_t oldest_time = std::numeric_limits<uint64_t>::max();
|
|
for (auto cfd : *versions_->GetColumnFamilySet()) {
|
|
if (!cfd->IsDropped()) {
|
|
uint64_t ctime;
|
|
{
|
|
SuperVersion* sv = GetAndRefSuperVersion(cfd);
|
|
Version* version = sv->current;
|
|
version->GetCreationTimeOfOldestFile(&ctime);
|
|
ReturnAndCleanupSuperVersion(cfd, sv);
|
|
}
|
|
|
|
if (ctime < oldest_time) {
|
|
oldest_time = ctime;
|
|
}
|
|
if (oldest_time == 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
*creation_time = oldest_time;
|
|
return Status::OK();
|
|
} else {
|
|
return Status::NotSupported("This API only works if max_open_files = -1");
|
|
}
|
|
}
|
|
|
|
void DBImpl::RecordSeqnoToTimeMapping() {
|
|
// Get time first then sequence number, so the actual time of seqno is <=
|
|
// unix_time recorded
|
|
int64_t unix_time = 0;
|
|
immutable_db_options_.clock->GetCurrentTime(&unix_time)
|
|
.PermitUncheckedError(); // Ignore error
|
|
SequenceNumber seqno = GetLatestSequenceNumber();
|
|
bool appended = false;
|
|
{
|
|
InstrumentedMutexLock l(&mutex_);
|
|
appended = seqno_time_mapping_.Append(seqno, unix_time);
|
|
}
|
|
if (!appended) {
|
|
ROCKS_LOG_WARN(immutable_db_options_.info_log,
|
|
"Failed to insert sequence number to time entry: %" PRIu64
|
|
" -> %" PRIu64,
|
|
seqno, unix_time);
|
|
}
|
|
}
|
|
#endif // ROCKSDB_LITE
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|