Support for single-primary, multi-secondary instances (#4899)
Summary: This PR allows RocksDB to run in single-primary, multi-secondary process mode. The writer is a regular RocksDB (e.g. an `DBImpl`) instance playing the role of a primary. Multiple `DBImplSecondary` processes (secondaries) share the same set of SST files, MANIFEST, WAL files with the primary. Secondaries tail the MANIFEST of the primary and apply updates to their own in-memory state of the file system, e.g. `VersionStorageInfo`. This PR has several components: 1. (Originally in #4745). Add a `PathNotFound` subcode to `IOError` to denote the failure when a secondary tries to open a file which has been deleted by the primary. 2. (Similar to #4602). Add `FragmentBufferedReader` to handle partially-read, trailing record at the end of a log from where future read can continue. 3. (Originally in #4710 and #4820). Add implementation of the secondary, i.e. `DBImplSecondary`. 3.1 Tail the primary's MANIFEST during recovery. 3.2 Tail the primary's MANIFEST during normal processing by calling `ReadAndApply`. 3.3 Tailing WAL will be in a future PR. 4. Add an example in 'examples/multi_processes_example.cc' to demonstrate the usage of secondary RocksDB instance in a multi-process setting. Instructions to run the example can be found at the beginning of the source code. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4899 Differential Revision: D14510945 Pulled By: riversand963 fbshipit-source-id: 4ac1c5693e6012ad23f7b4b42d3c374fecbe8886main
Yanqin Jin
6 years ago
committed by
Facebook Github Bot
parent
2a5463ae84
commit
9358178edc
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// 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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#include "db/db_impl_secondary.h" |
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#include "db/db_iter.h" |
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#include "db/merge_context.h" |
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#include "monitoring/perf_context_imp.h" |
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#include "util/auto_roll_logger.h" |
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namespace rocksdb { |
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#ifndef ROCKSDB_LITE |
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DBImplSecondary::DBImplSecondary(const DBOptions& db_options, |
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const std::string& dbname) |
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: DBImpl(db_options, dbname) { |
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ROCKS_LOG_INFO(immutable_db_options_.info_log, |
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"Opening the db in secondary mode"); |
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LogFlush(immutable_db_options_.info_log); |
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} |
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DBImplSecondary::~DBImplSecondary() {} |
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Status DBImplSecondary::Recover( |
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const std::vector<ColumnFamilyDescriptor>& column_families, |
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bool /*readonly*/, bool /*error_if_log_file_exist*/, |
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bool /*error_if_data_exists_in_logs*/) { |
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mutex_.AssertHeld(); |
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Status s; |
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s = static_cast<ReactiveVersionSet*>(versions_.get()) |
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->Recover(column_families, &manifest_reader_, &manifest_reporter_, |
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&manifest_reader_status_); |
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if (!s.ok()) { |
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return s; |
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} |
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if (immutable_db_options_.paranoid_checks && s.ok()) { |
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s = CheckConsistency(); |
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} |
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// Initial max_total_in_memory_state_ before recovery logs.
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max_total_in_memory_state_ = 0; |
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for (auto cfd : *versions_->GetColumnFamilySet()) { |
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auto* mutable_cf_options = cfd->GetLatestMutableCFOptions(); |
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max_total_in_memory_state_ += mutable_cf_options->write_buffer_size * |
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mutable_cf_options->max_write_buffer_number; |
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} |
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if (s.ok()) { |
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default_cf_handle_ = new ColumnFamilyHandleImpl( |
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versions_->GetColumnFamilySet()->GetDefault(), this, &mutex_); |
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default_cf_internal_stats_ = default_cf_handle_->cfd()->internal_stats(); |
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single_column_family_mode_ = |
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versions_->GetColumnFamilySet()->NumberOfColumnFamilies() == 1; |
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} |
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// TODO: attempt to recover from WAL files.
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return s; |
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} |
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// Implementation of the DB interface
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Status DBImplSecondary::Get(const ReadOptions& read_options, |
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ColumnFamilyHandle* column_family, const Slice& key, |
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PinnableSlice* value) { |
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return GetImpl(read_options, column_family, key, value); |
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} |
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Status DBImplSecondary::GetImpl(const ReadOptions& read_options, |
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ColumnFamilyHandle* column_family, |
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const Slice& key, PinnableSlice* pinnable_val) { |
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assert(pinnable_val != nullptr); |
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PERF_CPU_TIMER_GUARD(get_cpu_nanos, env_); |
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StopWatch sw(env_, stats_, DB_GET); |
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PERF_TIMER_GUARD(get_snapshot_time); |
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auto cfh = static_cast<ColumnFamilyHandleImpl*>(column_family); |
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ColumnFamilyData* cfd = cfh->cfd(); |
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if (tracer_) { |
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InstrumentedMutexLock lock(&trace_mutex_); |
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if (tracer_) { |
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tracer_->Get(column_family, key); |
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} |
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} |
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// Acquire SuperVersion
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SuperVersion* super_version = GetAndRefSuperVersion(cfd); |
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SequenceNumber snapshot = versions_->LastSequence(); |
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MergeContext merge_context; |
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SequenceNumber max_covering_tombstone_seq = 0; |
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Status s; |
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LookupKey lkey(key, snapshot); |
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PERF_TIMER_STOP(get_snapshot_time); |
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bool done = false; |
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if (super_version->mem->Get(lkey, pinnable_val->GetSelf(), &s, &merge_context, |
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&max_covering_tombstone_seq, read_options)) { |
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done = true; |
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pinnable_val->PinSelf(); |
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RecordTick(stats_, MEMTABLE_HIT); |
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} else if ((s.ok() || s.IsMergeInProgress()) && |
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super_version->imm->Get( |
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lkey, pinnable_val->GetSelf(), &s, &merge_context, |
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&max_covering_tombstone_seq, read_options)) { |
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done = true; |
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pinnable_val->PinSelf(); |
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RecordTick(stats_, MEMTABLE_HIT); |
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} |
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if (!done && !s.ok() && !s.IsMergeInProgress()) { |
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ReturnAndCleanupSuperVersion(cfd, super_version); |
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return s; |
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} |
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if (!done) { |
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PERF_TIMER_GUARD(get_from_output_files_time); |
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super_version->current->Get(read_options, lkey, pinnable_val, &s, |
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&merge_context, &max_covering_tombstone_seq); |
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RecordTick(stats_, MEMTABLE_MISS); |
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} |
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{ |
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PERF_TIMER_GUARD(get_post_process_time); |
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ReturnAndCleanupSuperVersion(cfd, super_version); |
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RecordTick(stats_, NUMBER_KEYS_READ); |
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size_t size = pinnable_val->size(); |
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RecordTick(stats_, BYTES_READ, size); |
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RecordTimeToHistogram(stats_, BYTES_PER_READ, size); |
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PERF_COUNTER_ADD(get_read_bytes, size); |
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} |
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return s; |
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} |
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Iterator* DBImplSecondary::NewIterator(const ReadOptions& read_options, |
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ColumnFamilyHandle* column_family) { |
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if (read_options.managed) { |
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return NewErrorIterator( |
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Status::NotSupported("Managed iterator is not supported anymore.")); |
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} |
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if (read_options.read_tier == kPersistedTier) { |
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return NewErrorIterator(Status::NotSupported( |
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"ReadTier::kPersistedData is not yet supported in iterators.")); |
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} |
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Iterator* result = nullptr; |
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auto cfh = reinterpret_cast<ColumnFamilyHandleImpl*>(column_family); |
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auto cfd = cfh->cfd(); |
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ReadCallback* read_callback = nullptr; // No read callback provided.
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if (read_options.tailing) { |
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return NewErrorIterator(Status::NotSupported( |
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"tailing iterator not supported in secondary mode")); |
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} else if (read_options.snapshot != nullptr) { |
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// TODO (yanqin) support snapshot.
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return NewErrorIterator( |
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Status::NotSupported("snapshot not supported in secondary mode")); |
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} else { |
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auto snapshot = versions_->LastSequence(); |
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result = NewIteratorImpl(read_options, cfd, snapshot, read_callback); |
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} |
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return result; |
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} |
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ArenaWrappedDBIter* DBImplSecondary::NewIteratorImpl( |
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const ReadOptions& read_options, ColumnFamilyData* cfd, |
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SequenceNumber snapshot, ReadCallback* read_callback) { |
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assert(nullptr != cfd); |
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SuperVersion* super_version = cfd->GetReferencedSuperVersion(&mutex_); |
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auto db_iter = NewArenaWrappedDbIterator( |
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env_, read_options, *cfd->ioptions(), super_version->mutable_cf_options, |
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snapshot, |
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super_version->mutable_cf_options.max_sequential_skip_in_iterations, |
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super_version->version_number, read_callback); |
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auto internal_iter = |
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NewInternalIterator(read_options, cfd, super_version, db_iter->GetArena(), |
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db_iter->GetRangeDelAggregator(), snapshot); |
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db_iter->SetIterUnderDBIter(internal_iter); |
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return db_iter; |
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} |
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Status DBImplSecondary::NewIterators( |
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const ReadOptions& read_options, |
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const std::vector<ColumnFamilyHandle*>& column_families, |
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std::vector<Iterator*>* iterators) { |
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if (read_options.managed) { |
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return Status::NotSupported("Managed iterator is not supported anymore."); |
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} |
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if (read_options.read_tier == kPersistedTier) { |
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return Status::NotSupported( |
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"ReadTier::kPersistedData is not yet supported in iterators."); |
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} |
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ReadCallback* read_callback = nullptr; // No read callback provided.
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if (iterators == nullptr) { |
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return Status::InvalidArgument("iterators not allowed to be nullptr"); |
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} |
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iterators->clear(); |
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iterators->reserve(column_families.size()); |
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if (read_options.tailing) { |
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return Status::NotSupported( |
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"tailing iterator not supported in secondary mode"); |
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} else if (read_options.snapshot != nullptr) { |
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// TODO (yanqin) support snapshot.
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return Status::NotSupported("snapshot not supported in secondary mode"); |
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} else { |
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SequenceNumber read_seq = versions_->LastSequence(); |
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for (auto cfh : column_families) { |
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ColumnFamilyData* cfd = static_cast<ColumnFamilyHandleImpl*>(cfh)->cfd(); |
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iterators->push_back( |
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NewIteratorImpl(read_options, cfd, read_seq, read_callback)); |
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} |
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} |
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return Status::OK(); |
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} |
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Status DBImplSecondary::TryCatchUpWithPrimary() { |
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assert(versions_.get() != nullptr); |
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assert(manifest_reader_.get() != nullptr); |
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Status s; |
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std::unordered_set<ColumnFamilyData*> cfds_changed; |
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InstrumentedMutexLock lock_guard(&mutex_); |
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s = static_cast<ReactiveVersionSet*>(versions_.get()) |
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->ReadAndApply(&mutex_, &manifest_reader_, &cfds_changed); |
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if (s.ok()) { |
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SuperVersionContext sv_context(true /* create_superversion */); |
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for (auto cfd : cfds_changed) { |
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sv_context.NewSuperVersion(); |
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cfd->InstallSuperVersion(&sv_context, &mutex_); |
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} |
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sv_context.Clean(); |
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} |
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return s; |
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} |
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Status DB::OpenAsSecondary(const Options& options, const std::string& dbname, |
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const std::string& secondary_path, DB** dbptr) { |
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*dbptr = nullptr; |
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DBOptions db_options(options); |
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ColumnFamilyOptions cf_options(options); |
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std::vector<ColumnFamilyDescriptor> column_families; |
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column_families.emplace_back(kDefaultColumnFamilyName, cf_options); |
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std::vector<ColumnFamilyHandle*> handles; |
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Status s = DB::OpenAsSecondary(db_options, dbname, secondary_path, |
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column_families, &handles, dbptr); |
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if (s.ok()) { |
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assert(handles.size() == 1); |
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delete handles[0]; |
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} |
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return s; |
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} |
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Status DB::OpenAsSecondary( |
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const DBOptions& db_options, const std::string& dbname, |
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const std::string& secondary_path, |
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const std::vector<ColumnFamilyDescriptor>& column_families, |
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std::vector<ColumnFamilyHandle*>* handles, DB** dbptr) { |
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*dbptr = nullptr; |
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if (db_options.max_open_files != -1) { |
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// TODO (yanqin) maybe support max_open_files != -1 by creating hard links
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// on SST files so that db secondary can still have access to old SSTs
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// while primary instance may delete original.
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return Status::InvalidArgument("require max_open_files to be -1"); |
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} |
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DBOptions tmp_opts(db_options); |
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if (nullptr == tmp_opts.info_log) { |
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Env* env = tmp_opts.env; |
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assert(env != nullptr); |
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std::string secondary_abs_path; |
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env->GetAbsolutePath(secondary_path, &secondary_abs_path); |
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std::string fname = InfoLogFileName(secondary_path, secondary_abs_path, |
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tmp_opts.db_log_dir); |
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env->CreateDirIfMissing(secondary_path); |
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if (tmp_opts.log_file_time_to_roll > 0 || tmp_opts.max_log_file_size > 0) { |
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AutoRollLogger* result = new AutoRollLogger( |
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env, secondary_path, tmp_opts.db_log_dir, tmp_opts.max_log_file_size, |
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tmp_opts.log_file_time_to_roll, tmp_opts.info_log_level); |
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Status s = result->GetStatus(); |
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if (!s.ok()) { |
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delete result; |
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} else { |
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tmp_opts.info_log.reset(result); |
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} |
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} |
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if (nullptr == tmp_opts.info_log) { |
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env->RenameFile( |
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fname, OldInfoLogFileName(secondary_path, env->NowMicros(), |
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secondary_abs_path, tmp_opts.db_log_dir)); |
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Status s = env->NewLogger(fname, &(tmp_opts.info_log)); |
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if (tmp_opts.info_log != nullptr) { |
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tmp_opts.info_log->SetInfoLogLevel(tmp_opts.info_log_level); |
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} |
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} |
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} |
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assert(tmp_opts.info_log != nullptr); |
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handles->clear(); |
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DBImplSecondary* impl = new DBImplSecondary(tmp_opts, dbname); |
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impl->versions_.reset(new ReactiveVersionSet( |
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dbname, &impl->immutable_db_options_, impl->env_options_, |
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impl->table_cache_.get(), impl->write_buffer_manager_, |
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&impl->write_controller_)); |
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impl->column_family_memtables_.reset( |
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new ColumnFamilyMemTablesImpl(impl->versions_->GetColumnFamilySet())); |
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impl->mutex_.Lock(); |
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Status s = impl->Recover(column_families, true, false, false); |
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if (s.ok()) { |
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for (auto cf : column_families) { |
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auto cfd = |
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impl->versions_->GetColumnFamilySet()->GetColumnFamily(cf.name); |
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if (nullptr == cfd) { |
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s = Status::InvalidArgument("Column family not found: ", cf.name); |
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break; |
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} |
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handles->push_back(new ColumnFamilyHandleImpl(cfd, impl, &impl->mutex_)); |
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} |
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} |
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SuperVersionContext sv_context(true /* create_superversion */); |
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if (s.ok()) { |
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for (auto cfd : *impl->versions_->GetColumnFamilySet()) { |
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sv_context.NewSuperVersion(); |
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cfd->InstallSuperVersion(&sv_context, &impl->mutex_); |
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} |
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} |
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impl->mutex_.Unlock(); |
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sv_context.Clean(); |
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if (s.ok()) { |
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*dbptr = impl; |
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for (auto h : *handles) { |
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impl->NewThreadStatusCfInfo( |
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reinterpret_cast<ColumnFamilyHandleImpl*>(h)->cfd()); |
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} |
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} else { |
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for (auto h : *handles) { |
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delete h; |
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} |
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handles->clear(); |
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delete impl; |
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} |
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return s; |
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} |
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#else // !ROCKSDB_LITE
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Status DB::OpenAsSecondary(const Options& /*options*/, |
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const std::string& /*name*/, |
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const std::string& /*secondary_path*/, |
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DB** /*dbptr*/) { |
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return Status::NotSupported("Not supported in ROCKSDB_LITE."); |
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} |
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Status DB::OpenAsSecondary( |
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const DBOptions& /*db_options*/, const std::string& /*dbname*/, |
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const std::string& /*secondary_path*/, |
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const std::vector<ColumnFamilyDescriptor>& /*column_families*/, |
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std::vector<ColumnFamilyHandle*>* /*handles*/, DB** /*dbptr*/) { |
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return Status::NotSupported("Not supported in ROCKSDB_LITE."); |
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} |
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#endif // !ROCKSDB_LITE
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} // namespace rocksdb
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@ -0,0 +1,151 @@ |
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// 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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#pragma once |
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#ifndef ROCKSDB_LITE |
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#include <string> |
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#include <vector> |
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#include "db/db_impl.h" |
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namespace rocksdb { |
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class DBImplSecondary : public DBImpl { |
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public: |
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DBImplSecondary(const DBOptions& options, const std::string& dbname); |
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~DBImplSecondary() override; |
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Status Recover(const std::vector<ColumnFamilyDescriptor>& column_families, |
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bool read_only, bool error_if_log_file_exist, |
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bool error_if_data_exists_in_logs) override; |
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// Implementations of the DB interface
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using DB::Get; |
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Status Get(const ReadOptions& options, ColumnFamilyHandle* column_family, |
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const Slice& key, PinnableSlice* value) override; |
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Status GetImpl(const ReadOptions& options, ColumnFamilyHandle* column_family, |
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const Slice& key, PinnableSlice* value); |
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using DBImpl::NewIterator; |
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Iterator* NewIterator(const ReadOptions&, |
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ColumnFamilyHandle* column_family) override; |
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ArenaWrappedDBIter* NewIteratorImpl(const ReadOptions& read_options, |
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ColumnFamilyData* cfd, |
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SequenceNumber snapshot, |
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ReadCallback* read_callback); |
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Status NewIterators(const ReadOptions& options, |
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const std::vector<ColumnFamilyHandle*>& column_families, |
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std::vector<Iterator*>* iterators) override; |
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using DBImpl::Put; |
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Status Put(const WriteOptions& /*options*/, |
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ColumnFamilyHandle* /*column_family*/, const Slice& /*key*/, |
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const Slice& /*value*/) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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using DBImpl::Merge; |
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Status Merge(const WriteOptions& /*options*/, |
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ColumnFamilyHandle* /*column_family*/, const Slice& /*key*/, |
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const Slice& /*value*/) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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using DBImpl::Delete; |
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Status Delete(const WriteOptions& /*options*/, |
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ColumnFamilyHandle* /*column_family*/, |
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const Slice& /*key*/) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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using DBImpl::SingleDelete; |
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Status SingleDelete(const WriteOptions& /*options*/, |
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ColumnFamilyHandle* /*column_family*/, |
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const Slice& /*key*/) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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Status Write(const WriteOptions& /*options*/, |
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WriteBatch* /*updates*/) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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using DBImpl::CompactRange; |
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Status CompactRange(const CompactRangeOptions& /*options*/, |
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ColumnFamilyHandle* /*column_family*/, |
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const Slice* /*begin*/, const Slice* /*end*/) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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using DBImpl::CompactFiles; |
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Status CompactFiles( |
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const CompactionOptions& /*compact_options*/, |
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ColumnFamilyHandle* /*column_family*/, |
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const std::vector<std::string>& /*input_file_names*/, |
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const int /*output_level*/, const int /*output_path_id*/ = -1, |
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std::vector<std::string>* const /*output_file_names*/ = nullptr, |
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CompactionJobInfo* /*compaction_job_info*/ = nullptr) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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Status DisableFileDeletions() override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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Status EnableFileDeletions(bool /*force*/) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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Status GetLiveFiles(std::vector<std::string>&, |
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uint64_t* /*manifest_file_size*/, |
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bool /*flush_memtable*/ = true) override { |
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return Status::NotSupported("Not supported operation in read only mode."); |
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} |
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using DBImpl::Flush; |
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Status Flush(const FlushOptions& /*options*/, |
||||
ColumnFamilyHandle* /*column_family*/) override { |
||||
return Status::NotSupported("Not supported operation in read only mode."); |
||||
} |
||||
|
||||
using DBImpl::SyncWAL; |
||||
Status SyncWAL() override { |
||||
return Status::NotSupported("Not supported operation in read only mode."); |
||||
} |
||||
|
||||
using DB::IngestExternalFile; |
||||
Status IngestExternalFile( |
||||
ColumnFamilyHandle* /*column_family*/, |
||||
const std::vector<std::string>& /*external_files*/, |
||||
const IngestExternalFileOptions& /*ingestion_options*/) override { |
||||
return Status::NotSupported("Not supported operation in read only mode."); |
||||
} |
||||
|
||||
// Try to catch up with the primary by reading as much as possible from the
|
||||
// log files until there is nothing more to read or encounters an error. If
|
||||
// the amount of information in the log files to process is huge, this
|
||||
// method can take long time due to all the I/O and CPU costs.
|
||||
Status TryCatchUpWithPrimary() override; |
||||
|
||||
private: |
||||
friend class DB; |
||||
|
||||
// No copying allowed
|
||||
DBImplSecondary(const DBImplSecondary&); |
||||
void operator=(const DBImplSecondary&); |
||||
|
||||
using DBImpl::Recover; |
||||
|
||||
std::unique_ptr<log::FragmentBufferedReader> manifest_reader_; |
||||
std::unique_ptr<log::Reader::Reporter> manifest_reporter_; |
||||
std::unique_ptr<Status> manifest_reader_status_; |
||||
}; |
||||
} // namespace rocksdb
|
||||
|
||||
#endif // !ROCKSDB_LITE
|
||||
@ -0,0 +1,480 @@ |
||||
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under both the GPLv2 (found in the
|
||||
// COPYING file in the root directory) and Apache 2.0 License
|
||||
// (found in the LICENSE.Apache file in the root directory).
|
||||
//
|
||||
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style license that can be
|
||||
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
||||
|
||||
#include "db/db_impl_secondary.h" |
||||
#include "db/db_test_util.h" |
||||
#include "port/stack_trace.h" |
||||
#include "util/fault_injection_test_env.h" |
||||
#include "util/sync_point.h" |
||||
|
||||
namespace rocksdb { |
||||
|
||||
#ifndef ROCKSDB_LITE |
||||
class DBSecondaryTest : public DBTestBase { |
||||
public: |
||||
DBSecondaryTest() |
||||
: DBTestBase("/db_secondary_test"), |
||||
secondary_path_(), |
||||
handles_secondary_(), |
||||
db_secondary_(nullptr) { |
||||
secondary_path_ = |
||||
test::PerThreadDBPath(env_, "/db_secondary_test_secondary"); |
||||
} |
||||
|
||||
~DBSecondaryTest() override { |
||||
CloseSecondary(); |
||||
if (getenv("KEEP_DB") != nullptr) { |
||||
fprintf(stdout, "Secondary DB is still at %s\n", secondary_path_.c_str()); |
||||
} else { |
||||
Options options; |
||||
options.env = env_; |
||||
EXPECT_OK(DestroyDB(secondary_path_, options)); |
||||
} |
||||
} |
||||
|
||||
protected: |
||||
Status ReopenAsSecondary(const Options& options) { |
||||
return DB::OpenAsSecondary(options, dbname_, secondary_path_, &db_); |
||||
} |
||||
|
||||
void OpenSecondary(const Options& options); |
||||
|
||||
void OpenSecondaryWithColumnFamilies( |
||||
const std::vector<std::string>& column_families, const Options& options); |
||||
|
||||
void CloseSecondary() { |
||||
for (auto h : handles_secondary_) { |
||||
db_secondary_->DestroyColumnFamilyHandle(h); |
||||
} |
||||
handles_secondary_.clear(); |
||||
delete db_secondary_; |
||||
db_secondary_ = nullptr; |
||||
} |
||||
|
||||
DBImplSecondary* db_secondary_full() { |
||||
return static_cast<DBImplSecondary*>(db_secondary_); |
||||
} |
||||
|
||||
void CheckFileTypeCounts(const std::string& dir, int expected_log, |
||||
int expected_sst, int expected_manifest) const; |
||||
|
||||
std::string secondary_path_; |
||||
std::vector<ColumnFamilyHandle*> handles_secondary_; |
||||
DB* db_secondary_; |
||||
}; |
||||
|
||||
void DBSecondaryTest::OpenSecondary(const Options& options) { |
||||
Status s = |
||||
DB::OpenAsSecondary(options, dbname_, secondary_path_, &db_secondary_); |
||||
ASSERT_OK(s); |
||||
} |
||||
|
||||
void DBSecondaryTest::OpenSecondaryWithColumnFamilies( |
||||
const std::vector<std::string>& column_families, const Options& options) { |
||||
std::vector<ColumnFamilyDescriptor> cf_descs; |
||||
cf_descs.emplace_back(kDefaultColumnFamilyName, options); |
||||
for (const auto& cf_name : column_families) { |
||||
cf_descs.emplace_back(cf_name, options); |
||||
} |
||||
Status s = DB::OpenAsSecondary(options, dbname_, secondary_path_, cf_descs, |
||||
&handles_secondary_, &db_secondary_); |
||||
ASSERT_OK(s); |
||||
} |
||||
|
||||
void DBSecondaryTest::CheckFileTypeCounts(const std::string& dir, |
||||
int expected_log, int expected_sst, |
||||
int expected_manifest) const { |
||||
std::vector<std::string> filenames; |
||||
env_->GetChildren(dir, &filenames); |
||||
|
||||
int log_cnt = 0, sst_cnt = 0, manifest_cnt = 0; |
||||
for (auto file : filenames) { |
||||
uint64_t number; |
||||
FileType type; |
||||
if (ParseFileName(file, &number, &type)) { |
||||
log_cnt += (type == kLogFile); |
||||
sst_cnt += (type == kTableFile); |
||||
manifest_cnt += (type == kDescriptorFile); |
||||
} |
||||
} |
||||
ASSERT_EQ(expected_log, log_cnt); |
||||
ASSERT_EQ(expected_sst, sst_cnt); |
||||
ASSERT_EQ(expected_manifest, manifest_cnt); |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, ReopenAsSecondary) { |
||||
Options options; |
||||
options.env = env_; |
||||
Reopen(options); |
||||
ASSERT_OK(Put("foo", "foo_value")); |
||||
ASSERT_OK(Put("bar", "bar_value")); |
||||
ASSERT_OK(dbfull()->Flush(FlushOptions())); |
||||
Close(); |
||||
|
||||
ASSERT_OK(ReopenAsSecondary(options)); |
||||
ASSERT_EQ("foo_value", Get("foo")); |
||||
ASSERT_EQ("bar_value", Get("bar")); |
||||
ReadOptions ropts; |
||||
ropts.verify_checksums = true; |
||||
auto db1 = static_cast<DBImplSecondary*>(db_); |
||||
ASSERT_NE(nullptr, db1); |
||||
Iterator* iter = db1->NewIterator(ropts); |
||||
ASSERT_NE(nullptr, iter); |
||||
size_t count = 0; |
||||
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) { |
||||
if (0 == count) { |
||||
ASSERT_EQ("bar", iter->key().ToString()); |
||||
ASSERT_EQ("bar_value", iter->value().ToString()); |
||||
} else if (1 == count) { |
||||
ASSERT_EQ("foo", iter->key().ToString()); |
||||
ASSERT_EQ("foo_value", iter->value().ToString()); |
||||
} |
||||
++count; |
||||
} |
||||
delete iter; |
||||
ASSERT_EQ(2, count); |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, OpenAsSecondary) { |
||||
Options options; |
||||
options.env = env_; |
||||
options.level0_file_num_compaction_trigger = 4; |
||||
Reopen(options); |
||||
for (int i = 0; i < 3; ++i) { |
||||
ASSERT_OK(Put("foo", "foo_value" + std::to_string(i))); |
||||
ASSERT_OK(Put("bar", "bar_value" + std::to_string(i))); |
||||
ASSERT_OK(Flush()); |
||||
} |
||||
Options options1; |
||||
options1.env = env_; |
||||
options1.max_open_files = -1; |
||||
OpenSecondary(options1); |
||||
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr)); |
||||
ASSERT_OK(dbfull()->TEST_WaitForCompact()); |
||||
|
||||
ReadOptions ropts; |
||||
ropts.verify_checksums = true; |
||||
const auto verify_db_func = [&](const std::string& foo_val, |
||||
const std::string& bar_val) { |
||||
std::string value; |
||||
ASSERT_OK(db_secondary_->Get(ropts, "foo", &value)); |
||||
ASSERT_EQ(foo_val, value); |
||||
ASSERT_OK(db_secondary_->Get(ropts, "bar", &value)); |
||||
ASSERT_EQ(bar_val, value); |
||||
Iterator* iter = db_secondary_->NewIterator(ropts); |
||||
ASSERT_NE(nullptr, iter); |
||||
iter->Seek("foo"); |
||||
ASSERT_TRUE(iter->Valid()); |
||||
ASSERT_EQ("foo", iter->key().ToString()); |
||||
ASSERT_EQ(foo_val, iter->value().ToString()); |
||||
iter->Seek("bar"); |
||||
ASSERT_TRUE(iter->Valid()); |
||||
ASSERT_EQ("bar", iter->key().ToString()); |
||||
ASSERT_EQ(bar_val, iter->value().ToString()); |
||||
size_t count = 0; |
||||
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) { |
||||
++count; |
||||
} |
||||
ASSERT_EQ(2, count); |
||||
delete iter; |
||||
}; |
||||
|
||||
verify_db_func("foo_value2", "bar_value2"); |
||||
|
||||
ASSERT_OK(Put("foo", "new_foo_value")); |
||||
ASSERT_OK(Put("bar", "new_bar_value")); |
||||
ASSERT_OK(Flush()); |
||||
|
||||
ASSERT_OK(db_secondary_->TryCatchUpWithPrimary()); |
||||
verify_db_func("new_foo_value", "new_bar_value"); |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, OpenWithNonExistColumnFamily) { |
||||
Options options; |
||||
options.env = env_; |
||||
CreateAndReopenWithCF({"pikachu"}, options); |
||||
|
||||
Options options1; |
||||
options1.env = env_; |
||||
options1.max_open_files = -1; |
||||
std::vector<ColumnFamilyDescriptor> cf_descs; |
||||
cf_descs.emplace_back(kDefaultColumnFamilyName, options1); |
||||
cf_descs.emplace_back("pikachu", options1); |
||||
cf_descs.emplace_back("eevee", options1); |
||||
Status s = DB::OpenAsSecondary(options1, dbname_, secondary_path_, cf_descs, |
||||
&handles_secondary_, &db_secondary_); |
||||
ASSERT_NOK(s); |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, OpenWithSubsetOfColumnFamilies) { |
||||
Options options; |
||||
options.env = env_; |
||||
CreateAndReopenWithCF({"pikachu"}, options); |
||||
Options options1; |
||||
options1.env = env_; |
||||
options1.max_open_files = -1; |
||||
OpenSecondary(options1); |
||||
ASSERT_EQ(0, handles_secondary_.size()); |
||||
ASSERT_NE(nullptr, db_secondary_); |
||||
|
||||
ASSERT_OK(Put(0 /*cf*/, "foo", "foo_value")); |
||||
ASSERT_OK(Put(1 /*cf*/, "foo", "foo_value")); |
||||
ASSERT_OK(Flush(0 /*cf*/)); |
||||
ASSERT_OK(Flush(1 /*cf*/)); |
||||
ASSERT_OK(db_secondary_->TryCatchUpWithPrimary()); |
||||
ReadOptions ropts; |
||||
ropts.verify_checksums = true; |
||||
std::string value; |
||||
ASSERT_OK(db_secondary_->Get(ropts, "foo", &value)); |
||||
ASSERT_EQ("foo_value", value); |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, SwitchToNewManifestDuringOpen) { |
||||
Options options; |
||||
options.env = env_; |
||||
Reopen(options); |
||||
Close(); |
||||
|
||||
SyncPoint::GetInstance()->DisableProcessing(); |
||||
SyncPoint::GetInstance()->ClearAllCallBacks(); |
||||
SyncPoint::GetInstance()->LoadDependency( |
||||
{{"ReactiveVersionSet::MaybeSwitchManifest:AfterGetCurrentManifestPath:0", |
||||
"VersionSet::ProcessManifestWrites:BeforeNewManifest"}, |
||||
{"VersionSet::ProcessManifestWrites:AfterNewManifest", |
||||
"ReactiveVersionSet::MaybeSwitchManifest:AfterGetCurrentManifestPath:" |
||||
"1"}}); |
||||
SyncPoint::GetInstance()->EnableProcessing(); |
||||
|
||||
// Make sure db calls RecoverLogFiles so as to trigger a manifest write,
|
||||
// which causes the db to switch to a new MANIFEST upon start.
|
||||
port::Thread ro_db_thread([&]() { |
||||
Options options1; |
||||
options1.env = env_; |
||||
options1.max_open_files = -1; |
||||
OpenSecondary(options1); |
||||
CloseSecondary(); |
||||
}); |
||||
Reopen(options); |
||||
ro_db_thread.join(); |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, MissingTableFileDuringOpen) { |
||||
Options options; |
||||
options.env = env_; |
||||
options.level0_file_num_compaction_trigger = 4; |
||||
Reopen(options); |
||||
for (int i = 0; i != options.level0_file_num_compaction_trigger; ++i) { |
||||
ASSERT_OK(Put("foo", "foo_value" + std::to_string(i))); |
||||
ASSERT_OK(Put("bar", "bar_value" + std::to_string(i))); |
||||
ASSERT_OK(dbfull()->Flush(FlushOptions())); |
||||
} |
||||
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable()); |
||||
ASSERT_OK(dbfull()->TEST_WaitForCompact()); |
||||
Options options1; |
||||
options1.env = env_; |
||||
options1.max_open_files = -1; |
||||
OpenSecondary(options1); |
||||
ReadOptions ropts; |
||||
ropts.verify_checksums = true; |
||||
std::string value; |
||||
ASSERT_OK(db_secondary_->Get(ropts, "foo", &value)); |
||||
ASSERT_EQ("foo_value" + |
||||
std::to_string(options.level0_file_num_compaction_trigger - 1), |
||||
value); |
||||
ASSERT_OK(db_secondary_->Get(ropts, "bar", &value)); |
||||
ASSERT_EQ("bar_value" + |
||||
std::to_string(options.level0_file_num_compaction_trigger - 1), |
||||
value); |
||||
Iterator* iter = db_secondary_->NewIterator(ropts); |
||||
ASSERT_NE(nullptr, iter); |
||||
iter->Seek("bar"); |
||||
ASSERT_TRUE(iter->Valid()); |
||||
ASSERT_EQ("bar", iter->key().ToString()); |
||||
ASSERT_EQ("bar_value" + |
||||
std::to_string(options.level0_file_num_compaction_trigger - 1), |
||||
iter->value().ToString()); |
||||
iter->Seek("foo"); |
||||
ASSERT_TRUE(iter->Valid()); |
||||
ASSERT_EQ("foo", iter->key().ToString()); |
||||
ASSERT_EQ("foo_value" + |
||||
std::to_string(options.level0_file_num_compaction_trigger - 1), |
||||
iter->value().ToString()); |
||||
size_t count = 0; |
||||
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) { |
||||
++count; |
||||
} |
||||
ASSERT_EQ(2, count); |
||||
delete iter; |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, MissingTableFile) { |
||||
int table_files_not_exist = 0; |
||||
SyncPoint::GetInstance()->DisableProcessing(); |
||||
SyncPoint::GetInstance()->ClearAllCallBacks(); |
||||
SyncPoint::GetInstance()->SetCallBack( |
||||
"ReactiveVersionSet::ReadAndApply:AfterLoadTableHandlers", |
||||
[&](void* arg) { |
||||
Status s = *reinterpret_cast<Status*>(arg); |
||||
if (s.IsPathNotFound()) { |
||||
++table_files_not_exist; |
||||
} else if (!s.ok()) { |
||||
assert(false); // Should not reach here
|
||||
} |
||||
}); |
||||
SyncPoint::GetInstance()->EnableProcessing(); |
||||
Options options; |
||||
options.env = env_; |
||||
options.level0_file_num_compaction_trigger = 4; |
||||
Reopen(options); |
||||
|
||||
Options options1; |
||||
options1.env = env_; |
||||
options1.max_open_files = -1; |
||||
OpenSecondary(options1); |
||||
|
||||
for (int i = 0; i != options.level0_file_num_compaction_trigger; ++i) { |
||||
ASSERT_OK(Put("foo", "foo_value" + std::to_string(i))); |
||||
ASSERT_OK(Put("bar", "bar_value" + std::to_string(i))); |
||||
ASSERT_OK(dbfull()->Flush(FlushOptions())); |
||||
} |
||||
ASSERT_OK(dbfull()->TEST_WaitForFlushMemTable()); |
||||
ASSERT_OK(dbfull()->TEST_WaitForCompact()); |
||||
|
||||
ASSERT_NE(nullptr, db_secondary_full()); |
||||
ReadOptions ropts; |
||||
ropts.verify_checksums = true; |
||||
std::string value; |
||||
ASSERT_NOK(db_secondary_->Get(ropts, "foo", &value)); |
||||
ASSERT_NOK(db_secondary_->Get(ropts, "bar", &value)); |
||||
|
||||
ASSERT_OK(db_secondary_->TryCatchUpWithPrimary()); |
||||
ASSERT_EQ(options.level0_file_num_compaction_trigger, table_files_not_exist); |
||||
ASSERT_OK(db_secondary_->Get(ropts, "foo", &value)); |
||||
ASSERT_EQ("foo_value" + |
||||
std::to_string(options.level0_file_num_compaction_trigger - 1), |
||||
value); |
||||
ASSERT_OK(db_secondary_->Get(ropts, "bar", &value)); |
||||
ASSERT_EQ("bar_value" + |
||||
std::to_string(options.level0_file_num_compaction_trigger - 1), |
||||
value); |
||||
Iterator* iter = db_secondary_->NewIterator(ropts); |
||||
ASSERT_NE(nullptr, iter); |
||||
iter->Seek("bar"); |
||||
ASSERT_TRUE(iter->Valid()); |
||||
ASSERT_EQ("bar", iter->key().ToString()); |
||||
ASSERT_EQ("bar_value" + |
||||
std::to_string(options.level0_file_num_compaction_trigger - 1), |
||||
iter->value().ToString()); |
||||
iter->Seek("foo"); |
||||
ASSERT_TRUE(iter->Valid()); |
||||
ASSERT_EQ("foo", iter->key().ToString()); |
||||
ASSERT_EQ("foo_value" + |
||||
std::to_string(options.level0_file_num_compaction_trigger - 1), |
||||
iter->value().ToString()); |
||||
size_t count = 0; |
||||
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) { |
||||
++count; |
||||
} |
||||
ASSERT_EQ(2, count); |
||||
delete iter; |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, PrimaryDropColumnFamily) { |
||||
Options options; |
||||
options.env = env_; |
||||
const std::string kCfName1 = "pikachu"; |
||||
CreateAndReopenWithCF({kCfName1}, options); |
||||
|
||||
Options options1; |
||||
options1.env = env_; |
||||
options1.max_open_files = -1; |
||||
OpenSecondaryWithColumnFamilies({kCfName1}, options1); |
||||
ASSERT_EQ(2, handles_secondary_.size()); |
||||
|
||||
ASSERT_OK(Put(1 /*cf*/, "foo", "foo_val_1")); |
||||
ASSERT_OK(Flush(1 /*cf*/)); |
||||
|
||||
ASSERT_OK(db_secondary_->TryCatchUpWithPrimary()); |
||||
ReadOptions ropts; |
||||
ropts.verify_checksums = true; |
||||
std::string value; |
||||
ASSERT_OK(db_secondary_->Get(ropts, handles_secondary_[1], "foo", &value)); |
||||
ASSERT_EQ("foo_val_1", value); |
||||
|
||||
ASSERT_OK(dbfull()->DropColumnFamily(handles_[1])); |
||||
Close(); |
||||
CheckFileTypeCounts(dbname_, 1, 0, 1); |
||||
ASSERT_OK(db_secondary_->TryCatchUpWithPrimary()); |
||||
value.clear(); |
||||
ASSERT_OK(db_secondary_->Get(ropts, handles_secondary_[1], "foo", &value)); |
||||
ASSERT_EQ("foo_val_1", value); |
||||
} |
||||
|
||||
TEST_F(DBSecondaryTest, SwitchManifest) { |
||||
Options options; |
||||
options.env = env_; |
||||
options.level0_file_num_compaction_trigger = 4; |
||||
Reopen(options); |
||||
|
||||
Options options1; |
||||
options1.env = env_; |
||||
options1.max_open_files = -1; |
||||
OpenSecondary(options1); |
||||
|
||||
const int kNumFiles = options.level0_file_num_compaction_trigger - 1; |
||||
// Keep it smaller than 10 so that key0, key1, ..., key9 are sorted as 0, 1,
|
||||
// ..., 9.
|
||||
const int kNumKeys = 10; |
||||
// Create two sst
|
||||
for (int i = 0; i != kNumFiles; ++i) { |
||||
for (int j = 0; j != kNumKeys; ++j) { |
||||
ASSERT_OK(Put("key" + std::to_string(j), "value_" + std::to_string(i))); |
||||
} |
||||
ASSERT_OK(Flush()); |
||||
} |
||||
|
||||
ASSERT_OK(db_secondary_->TryCatchUpWithPrimary()); |
||||
const auto& range_scan_db = [&]() { |
||||
ReadOptions tmp_ropts; |
||||
tmp_ropts.total_order_seek = true; |
||||
tmp_ropts.verify_checksums = true; |
||||
std::unique_ptr<Iterator> iter(db_secondary_->NewIterator(tmp_ropts)); |
||||
int cnt = 0; |
||||
for (iter->SeekToFirst(); iter->Valid(); iter->Next(), ++cnt) { |
||||
ASSERT_EQ("key" + std::to_string(cnt), iter->key().ToString()); |
||||
ASSERT_EQ("value_" + std::to_string(kNumFiles - 1), |
||||
iter->value().ToString()); |
||||
} |
||||
}; |
||||
|
||||
range_scan_db(); |
||||
|
||||
// While secondary instance still keeps old MANIFEST open, we close primary,
|
||||
// restart primary, performs full compaction, close again, restart again so
|
||||
// that next time secondary tries to catch up with primary, the secondary
|
||||
// will skip the MANIFEST in middle.
|
||||
Reopen(options); |
||||
ASSERT_OK(dbfull()->CompactRange(CompactRangeOptions(), nullptr, nullptr)); |
||||
ASSERT_OK(dbfull()->TEST_WaitForCompact()); |
||||
|
||||
Reopen(options); |
||||
ASSERT_OK(dbfull()->SetOptions({{"disable_auto_compactions", "false"}})); |
||||
|
||||
ASSERT_OK(db_secondary_->TryCatchUpWithPrimary()); |
||||
range_scan_db(); |
||||
} |
||||
#endif //! ROCKSDB_LITE
|
||||
|
||||
} // namespace rocksdb
|
||||
|
||||
int main(int argc, char** argv) { |
||||
rocksdb::port::InstallStackTraceHandler(); |
||||
::testing::InitGoogleTest(&argc, argv); |
||||
return RUN_ALL_TESTS(); |
||||
} |
||||
@ -0,0 +1,395 @@ |
||||
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
||||
// This source code is licensed under both the GPLv2 (found in the
|
||||
// COPYING file in the root directory) and Apache 2.0 License
|
||||
// (found in the LICENSE.Apache file in the root directory).
|
||||
|
||||
// How to use this example
|
||||
// Open two terminals, in one of them, run `./multi_processes_example 0` to
|
||||
// start a process running the primary instance. This will create a new DB in
|
||||
// kDBPath. The process will run for a while inserting keys to the normal
|
||||
// RocksDB database.
|
||||
// Next, go to the other terminal and run `./multi_processes_example 1` to
|
||||
// start a process running the secondary instance. This will create a secondary
|
||||
// instance following the aforementioned primary instance. This process will
|
||||
// run for a while, tailing the logs of the primary. After process with primary
|
||||
// instance exits, this process will keep running until you hit 'CTRL+C'.
|
||||
|
||||
#include <inttypes.h> |
||||
#include <chrono> |
||||
#include <cstdio> |
||||
#include <cstdlib> |
||||
#include <ctime> |
||||
#include <string> |
||||
#include <thread> |
||||
#include <vector> |
||||
|
||||
#if defined(OS_LINUX) |
||||
#include <dirent.h> |
||||
#include <signal.h> |
||||
#include <sys/stat.h> |
||||
#include <sys/types.h> |
||||
#include <sys/wait.h> |
||||
#include <unistd.h> |
||||
#endif // !OS_LINUX
|
||||
|
||||
#include "rocksdb/db.h" |
||||
#include "rocksdb/options.h" |
||||
#include "rocksdb/slice.h" |
||||
|
||||
using rocksdb::ColumnFamilyDescriptor; |
||||
using rocksdb::ColumnFamilyHandle; |
||||
using rocksdb::ColumnFamilyOptions; |
||||
using rocksdb::DB; |
||||
using rocksdb::FlushOptions; |
||||
using rocksdb::Iterator; |
||||
using rocksdb::Options; |
||||
using rocksdb::ReadOptions; |
||||
using rocksdb::Slice; |
||||
using rocksdb::Status; |
||||
using rocksdb::WriteOptions; |
||||
|
||||
const std::string kDBPath = "/tmp/rocksdb_multi_processes_example"; |
||||
const std::string kPrimaryStatusFile = |
||||
"/tmp/rocksdb_multi_processes_example_primary_status"; |
||||
const uint64_t kMaxKey = 600000; |
||||
const size_t kMaxValueLength = 256; |
||||
const size_t kNumKeysPerFlush = 1000; |
||||
|
||||
const std::vector<std::string>& GetColumnFamilyNames() { |
||||
static std::vector<std::string> column_family_names = { |
||||
rocksdb::kDefaultColumnFamilyName, "pikachu"}; |
||||
return column_family_names; |
||||
} |
||||
|
||||
inline bool IsLittleEndian() { |
||||
uint32_t x = 1; |
||||
return *reinterpret_cast<char*>(&x) != 0; |
||||
} |
||||
|
||||
static std::atomic<int>& ShouldSecondaryWait() { |
||||
static std::atomic<int> should_secondary_wait{1}; |
||||
return should_secondary_wait; |
||||
} |
||||
|
||||
static std::string Key(uint64_t k) { |
||||
std::string ret; |
||||
if (IsLittleEndian()) { |
||||
ret.append(reinterpret_cast<char*>(&k), sizeof(k)); |
||||
} else { |
||||
char buf[sizeof(k)]; |
||||
buf[0] = k & 0xff; |
||||
buf[1] = (k >> 8) & 0xff; |
||||
buf[2] = (k >> 16) & 0xff; |
||||
buf[3] = (k >> 24) & 0xff; |
||||
buf[4] = (k >> 32) & 0xff; |
||||
buf[5] = (k >> 40) & 0xff; |
||||
buf[6] = (k >> 48) & 0xff; |
||||
buf[7] = (k >> 56) & 0xff; |
||||
ret.append(buf, sizeof(k)); |
||||
} |
||||
size_t i = 0, j = ret.size() - 1; |
||||
while (i < j) { |
||||
char tmp = ret[i]; |
||||
ret[i] = ret[j]; |
||||
ret[j] = tmp; |
||||
++i; |
||||
--j; |
||||
} |
||||
return ret; |
||||
} |
||||
|
||||
static uint64_t Key(std::string key) { |
||||
assert(key.size() == sizeof(uint64_t)); |
||||
size_t i = 0, j = key.size() - 1; |
||||
while (i < j) { |
||||
char tmp = key[i]; |
||||
key[i] = key[j]; |
||||
key[j] = tmp; |
||||
++i; |
||||
--j; |
||||
} |
||||
uint64_t ret = 0; |
||||
if (IsLittleEndian()) { |
||||
memcpy(&ret, key.c_str(), sizeof(uint64_t)); |
||||
} else { |
||||
const char* buf = key.c_str(); |
||||
ret |= static_cast<uint64_t>(buf[0]); |
||||
ret |= (static_cast<uint64_t>(buf[1]) << 8); |
||||
ret |= (static_cast<uint64_t>(buf[2]) << 16); |
||||
ret |= (static_cast<uint64_t>(buf[3]) << 24); |
||||
ret |= (static_cast<uint64_t>(buf[4]) << 32); |
||||
ret |= (static_cast<uint64_t>(buf[5]) << 40); |
||||
ret |= (static_cast<uint64_t>(buf[6]) << 48); |
||||
ret |= (static_cast<uint64_t>(buf[7]) << 56); |
||||
} |
||||
return ret; |
||||
} |
||||
|
||||
static Slice GenerateRandomValue(const size_t max_length, char scratch[]) { |
||||
size_t sz = 1 + (std::rand() % max_length); |
||||
int rnd = std::rand(); |
||||
for (size_t i = 0; i != sz; ++i) { |
||||
scratch[i] = static_cast<char>(rnd ^ i); |
||||
} |
||||
return Slice(scratch, sz); |
||||
} |
||||
|
||||
static bool ShouldCloseDB() { return true; } |
||||
|
||||
// TODO: port this example to other systems. It should be straightforward for
|
||||
// POSIX-compliant systems.
|
||||
#if defined(OS_LINUX) |
||||
void CreateDB() { |
||||
long my_pid = static_cast<long>(getpid()); |
||||
Options options; |
||||
Status s = rocksdb::DestroyDB(kDBPath, options); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, "[process %ld] Failed to destroy DB: %s\n", my_pid, |
||||
s.ToString().c_str()); |
||||
assert(false); |
||||
} |
||||
options.create_if_missing = true; |
||||
DB* db = nullptr; |
||||
s = DB::Open(options, kDBPath, &db); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, "[process %ld] Failed to open DB: %s\n", my_pid, |
||||
s.ToString().c_str()); |
||||
assert(false); |
||||
} |
||||
std::vector<ColumnFamilyHandle*> handles; |
||||
ColumnFamilyOptions cf_opts(options); |
||||
for (const auto& cf_name : GetColumnFamilyNames()) { |
||||
if (rocksdb::kDefaultColumnFamilyName != cf_name) { |
||||
ColumnFamilyHandle* handle = nullptr; |
||||
s = db->CreateColumnFamily(cf_opts, cf_name, &handle); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, "[process %ld] Failed to create CF %s: %s\n", my_pid, |
||||
cf_name.c_str(), s.ToString().c_str()); |
||||
assert(false); |
||||
} |
||||
handles.push_back(handle); |
||||
} |
||||
} |
||||
fprintf(stdout, "[process %ld] Column families created\n", my_pid); |
||||
for (auto h : handles) { |
||||
delete h; |
||||
} |
||||
handles.clear(); |
||||
delete db; |
||||
} |
||||
|
||||
void RunPrimary() { |
||||
long my_pid = static_cast<long>(getpid()); |
||||
fprintf(stdout, "[process %ld] Primary instance starts\n", my_pid); |
||||
CreateDB(); |
||||
std::srand(time(nullptr)); |
||||
DB* db = nullptr; |
||||
Options options; |
||||
options.create_if_missing = false; |
||||
std::vector<ColumnFamilyDescriptor> column_families; |
||||
for (const auto& cf_name : GetColumnFamilyNames()) { |
||||
column_families.push_back(ColumnFamilyDescriptor(cf_name, options)); |
||||
} |
||||
std::vector<ColumnFamilyHandle*> handles; |
||||
WriteOptions write_opts; |
||||
char val_buf[kMaxValueLength] = {0}; |
||||
uint64_t curr_key = 0; |
||||
while (curr_key < kMaxKey) { |
||||
Status s; |
||||
if (nullptr == db) { |
||||
s = DB::Open(options, kDBPath, column_families, &handles, &db); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, "[process %ld] Failed to open DB: %s\n", my_pid, |
||||
s.ToString().c_str()); |
||||
assert(false); |
||||
} |
||||
} |
||||
assert(nullptr != db); |
||||
assert(handles.size() == GetColumnFamilyNames().size()); |
||||
for (auto h : handles) { |
||||
assert(nullptr != h); |
||||
for (size_t i = 0; i != kNumKeysPerFlush; ++i) { |
||||
Slice key = Key(curr_key + static_cast<uint64_t>(i)); |
||||
Slice value = GenerateRandomValue(kMaxValueLength, val_buf); |
||||
s = db->Put(write_opts, h, key, value); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, "[process %ld] Failed to insert\n", my_pid); |
||||
assert(false); |
||||
} |
||||
} |
||||
s = db->Flush(FlushOptions(), h); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, "[process %ld] Failed to flush\n", my_pid); |
||||
assert(false); |
||||
} |
||||
} |
||||
curr_key += static_cast<uint64_t>(kNumKeysPerFlush); |
||||
if (ShouldCloseDB()) { |
||||
for (auto h : handles) { |
||||
delete h; |
||||
} |
||||
handles.clear(); |
||||
delete db; |
||||
db = nullptr; |
||||
} |
||||
} |
||||
if (nullptr != db) { |
||||
for (auto h : handles) { |
||||
delete h; |
||||
} |
||||
handles.clear(); |
||||
delete db; |
||||
db = nullptr; |
||||
} |
||||
fprintf(stdout, "[process %ld] Finished adding keys\n", my_pid); |
||||
} |
||||
|
||||
void secondary_instance_sigint_handler(int signal) { |
||||
ShouldSecondaryWait().store(0, std::memory_order_relaxed); |
||||
fprintf(stdout, "\n"); |
||||
fflush(stdout); |
||||
}; |
||||
|
||||
void RunSecondary() { |
||||
::signal(SIGINT, secondary_instance_sigint_handler); |
||||
long my_pid = static_cast<long>(getpid()); |
||||
const std::string kSecondaryPath = |
||||
"/tmp/rocksdb_multi_processes_example_secondary"; |
||||
// Create directory if necessary
|
||||
if (nullptr == opendir(kSecondaryPath.c_str())) { |
||||
int ret = |
||||
mkdir(kSecondaryPath.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH); |
||||
if (ret < 0) { |
||||
perror("failed to create directory for secondary instance"); |
||||
exit(0); |
||||
} |
||||
} |
||||
DB* db = nullptr; |
||||
Options options; |
||||
options.create_if_missing = false; |
||||
options.max_open_files = -1; |
||||
Status s = DB::OpenAsSecondary(options, kDBPath, kSecondaryPath, &db); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, "[process %ld] Failed to open in secondary mode: %s\n", |
||||
my_pid, s.ToString().c_str()); |
||||
assert(false); |
||||
} else { |
||||
fprintf(stdout, "[process %ld] Secondary instance starts\n", my_pid); |
||||
} |
||||
|
||||
ReadOptions ropts; |
||||
ropts.verify_checksums = true; |
||||
ropts.total_order_seek = true; |
||||
|
||||
std::vector<std::thread> test_threads; |
||||
test_threads.emplace_back([&]() { |
||||
while (1 == ShouldSecondaryWait().load(std::memory_order_relaxed)) { |
||||
std::unique_ptr<Iterator> iter(db->NewIterator(ropts)); |
||||
iter->SeekToFirst(); |
||||
size_t count = 0; |
||||
for (; iter->Valid(); iter->Next()) { |
||||
++count; |
||||
} |
||||
} |
||||
fprintf(stdout, "[process %ld] Range_scan thread finished\n", my_pid); |
||||
}); |
||||
|
||||
test_threads.emplace_back([&]() { |
||||
std::srand(time(nullptr)); |
||||
while (1 == ShouldSecondaryWait().load(std::memory_order_relaxed)) { |
||||
Slice key = Key(std::rand() % kMaxKey); |
||||
std::string value; |
||||
db->Get(ropts, key, &value); |
||||
} |
||||
fprintf(stdout, "[process %ld] Point lookup thread finished\n"); |
||||
}); |
||||
|
||||
uint64_t curr_key = 0; |
||||
while (1 == ShouldSecondaryWait().load(std::memory_order_relaxed)) { |
||||
s = db->TryCatchUpWithPrimary(); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, |
||||
"[process %ld] error while trying to catch up with " |
||||
"primary %s\n", |
||||
my_pid, s.ToString().c_str()); |
||||
assert(false); |
||||
} |
||||
{ |
||||
std::unique_ptr<Iterator> iter(db->NewIterator(ropts)); |
||||
if (!iter) { |
||||
fprintf(stderr, "[process %ld] Failed to create iterator\n", my_pid); |
||||
assert(false); |
||||
} |
||||
iter->SeekToLast(); |
||||
if (iter->Valid()) { |
||||
uint64_t curr_max_key = Key(iter->key().ToString()); |
||||
if (curr_max_key != curr_key) { |
||||
fprintf(stdout, "[process %ld] Observed key %" PRIu64 "\n", my_pid, |
||||
curr_key); |
||||
curr_key = curr_max_key; |
||||
} |
||||
} |
||||
} |
||||
std::this_thread::sleep_for(std::chrono::seconds(1)); |
||||
} |
||||
s = db->TryCatchUpWithPrimary(); |
||||
if (!s.ok()) { |
||||
fprintf(stderr, |
||||
"[process %ld] error while trying to catch up with " |
||||
"primary %s\n", |
||||
my_pid, s.ToString().c_str()); |
||||
assert(false); |
||||
} |
||||
|
||||
std::vector<ColumnFamilyDescriptor> column_families; |
||||
for (const auto& cf_name : GetColumnFamilyNames()) { |
||||
column_families.push_back(ColumnFamilyDescriptor(cf_name, options)); |
||||
} |
||||
std::vector<ColumnFamilyHandle*> handles; |
||||
DB* verification_db = nullptr; |
||||
s = DB::OpenForReadOnly(options, kDBPath, column_families, &handles, |
||||
&verification_db); |
||||
assert(s.ok()); |
||||
Iterator* iter1 = verification_db->NewIterator(ropts); |
||||
iter1->SeekToFirst(); |
||||
|
||||
Iterator* iter = db->NewIterator(ropts); |
||||
iter->SeekToFirst(); |
||||
for (; iter->Valid() && iter1->Valid(); iter->Next(), iter1->Next()) { |
||||
if (iter->key().ToString() != iter1->key().ToString()) { |
||||
fprintf(stderr, "%" PRIu64 "!= %" PRIu64 "\n", |
||||
Key(iter->key().ToString()), Key(iter1->key().ToString())); |
||||
assert(false); |
||||
} else if (iter->value().ToString() != iter1->value().ToString()) { |
||||
fprintf(stderr, "Value mismatch\n"); |
||||
assert(false); |
||||
} |
||||
} |
||||
fprintf(stdout, "[process %ld] Verification succeeded\n", my_pid); |
||||
for (auto& thr : test_threads) { |
||||
thr.join(); |
||||
} |
||||
delete iter; |
||||
delete iter1; |
||||
delete db; |
||||
delete verification_db; |
||||
} |
||||
|
||||
int main(int argc, char** argv) { |
||||
if (argc < 2) { |
||||
fprintf(stderr, "%s <0 for primary, 1 for secondary>\n", argv[0]); |
||||
return 0; |
||||
} |
||||
if (atoi(argv[1]) == 0) { |
||||
RunPrimary(); |
||||
} else { |
||||
RunSecondary(); |
||||
} |
||||
return 0; |
||||
} |
||||
#else // OS_LINUX
|
||||
int main() { |
||||
fpritnf(stderr, "Not implemented.\n"); |
||||
return 0; |
||||
} |
||||
#endif // !OS_LINUX
|
||||
Loading…
Reference in new issue