fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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502 lines
18 KiB
502 lines
18 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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#ifndef ROCKSDB_LITE
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#include "table/sst_file_dumper.h"
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#include <chrono>
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#include <cinttypes>
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#include <iostream>
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#include <map>
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#include <memory>
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#include <sstream>
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#include <vector>
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#include "db/blob/blob_index.h"
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#include "db/memtable.h"
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#include "db/write_batch_internal.h"
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#include "options/cf_options.h"
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#include "port/port.h"
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#include "rocksdb/db.h"
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#include "rocksdb/env.h"
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#include "rocksdb/iterator.h"
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#include "rocksdb/slice_transform.h"
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#include "rocksdb/status.h"
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#include "rocksdb/table_properties.h"
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#include "rocksdb/utilities/ldb_cmd.h"
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#include "table/block_based/block.h"
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#include "table/block_based/block_based_table_builder.h"
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#include "table/block_based/block_based_table_factory.h"
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#include "table/block_based/block_builder.h"
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#include "table/format.h"
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#include "table/meta_blocks.h"
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#include "table/plain/plain_table_factory.h"
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#include "table/table_reader.h"
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#include "util/compression.h"
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#include "util/random.h"
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namespace ROCKSDB_NAMESPACE {
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SstFileDumper::SstFileDumper(const Options& options,
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const std::string& file_path,
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size_t readahead_size, bool verify_checksum,
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bool output_hex, bool decode_blob_index,
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const EnvOptions& soptions, bool silent)
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: file_name_(file_path),
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read_num_(0),
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output_hex_(output_hex),
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decode_blob_index_(decode_blob_index),
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soptions_(soptions),
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silent_(silent),
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options_(options),
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ioptions_(options_),
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moptions_(ColumnFamilyOptions(options_)),
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read_options_(verify_checksum, false),
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internal_comparator_(BytewiseComparator()) {
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read_options_.readahead_size = readahead_size;
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if (!silent_) {
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fprintf(stdout, "Process %s\n", file_path.c_str());
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}
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init_result_ = GetTableReader(file_name_);
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}
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extern const uint64_t kBlockBasedTableMagicNumber;
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extern const uint64_t kLegacyBlockBasedTableMagicNumber;
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extern const uint64_t kPlainTableMagicNumber;
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extern const uint64_t kLegacyPlainTableMagicNumber;
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const char* testFileName = "test_file_name";
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Status SstFileDumper::GetTableReader(const std::string& file_path) {
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// Warning about 'magic_number' being uninitialized shows up only in UBsan
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// builds. Though access is guarded by 's.ok()' checks, fix the issue to
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// avoid any warnings.
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uint64_t magic_number = Footer::kInvalidTableMagicNumber;
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// read table magic number
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Footer footer;
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const auto& fs = options_.env->GetFileSystem();
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std::unique_ptr<FSRandomAccessFile> file;
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uint64_t file_size = 0;
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Status s = fs->NewRandomAccessFile(file_path, FileOptions(soptions_), &file,
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nullptr);
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if (s.ok()) {
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s = fs->GetFileSize(file_path, IOOptions(), &file_size, nullptr);
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}
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// check empty file
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// if true, skip further processing of this file
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if (file_size == 0) {
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return Status::Aborted(file_path, "Empty file");
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}
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file_.reset(new RandomAccessFileReader(std::move(file), file_path));
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FilePrefetchBuffer prefetch_buffer(nullptr, 0, 0, true /* enable */,
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false /* track_min_offset */);
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if (s.ok()) {
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const uint64_t kSstDumpTailPrefetchSize = 512 * 1024;
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uint64_t prefetch_size = (file_size > kSstDumpTailPrefetchSize)
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? kSstDumpTailPrefetchSize
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: file_size;
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uint64_t prefetch_off = file_size - prefetch_size;
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IOOptions opts;
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s = prefetch_buffer.Prefetch(opts, file_.get(), prefetch_off,
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static_cast<size_t>(prefetch_size));
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s = ReadFooterFromFile(opts, file_.get(), &prefetch_buffer, file_size,
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&footer);
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}
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if (s.ok()) {
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magic_number = footer.table_magic_number();
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}
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if (s.ok()) {
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if (magic_number == kPlainTableMagicNumber ||
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magic_number == kLegacyPlainTableMagicNumber) {
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soptions_.use_mmap_reads = true;
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fs->NewRandomAccessFile(file_path, FileOptions(soptions_), &file,
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nullptr);
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file_.reset(new RandomAccessFileReader(std::move(file), file_path));
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}
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options_.comparator = &internal_comparator_;
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// For old sst format, ReadTableProperties might fail but file can be read
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if (ReadTableProperties(magic_number, file_.get(), file_size,
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(magic_number == kBlockBasedTableMagicNumber)
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? &prefetch_buffer
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: nullptr)
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.ok()) {
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s = SetTableOptionsByMagicNumber(magic_number);
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} else {
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s = SetOldTableOptions();
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}
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}
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if (s.ok()) {
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s = NewTableReader(ioptions_, soptions_, internal_comparator_, file_size,
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&table_reader_);
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}
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return s;
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}
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Status SstFileDumper::NewTableReader(
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const ImmutableOptions& /*ioptions*/, const EnvOptions& /*soptions*/,
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const InternalKeyComparator& /*internal_comparator*/, uint64_t file_size,
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std::unique_ptr<TableReader>* /*table_reader*/) {
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auto t_opt =
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TableReaderOptions(ioptions_, moptions_.prefix_extractor.get(), soptions_,
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internal_comparator_, false /* skip_filters */,
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false /* imortal */, true /* force_direct_prefetch */);
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// Allow open file with global sequence number for backward compatibility.
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t_opt.largest_seqno = kMaxSequenceNumber;
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// We need to turn off pre-fetching of index and filter nodes for
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// BlockBasedTable
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if (options_.table_factory->IsInstanceOf(
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TableFactory::kBlockBasedTableName())) {
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return options_.table_factory->NewTableReader(t_opt, std::move(file_),
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file_size, &table_reader_,
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/*enable_prefetch=*/false);
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}
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// For all other factory implementation
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return options_.table_factory->NewTableReader(t_opt, std::move(file_),
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file_size, &table_reader_);
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}
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Status SstFileDumper::VerifyChecksum() {
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// We could pass specific readahead setting into read options if needed.
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return table_reader_->VerifyChecksum(read_options_,
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TableReaderCaller::kSSTDumpTool);
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}
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Status SstFileDumper::DumpTable(const std::string& out_filename) {
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std::unique_ptr<WritableFile> out_file;
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Env* env = options_.env;
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Status s = env->NewWritableFile(out_filename, &out_file, soptions_);
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if (s.ok()) {
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s = table_reader_->DumpTable(out_file.get());
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}
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if (!s.ok()) {
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// close the file before return error, ignore the close error if there's any
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out_file->Close().PermitUncheckedError();
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return s;
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}
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return out_file->Close();
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}
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Status SstFileDumper::CalculateCompressedTableSize(
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const TableBuilderOptions& tb_options, size_t block_size,
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uint64_t* num_data_blocks, uint64_t* compressed_table_size) {
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std::unique_ptr<Env> env(NewMemEnv(options_.env));
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std::unique_ptr<WritableFileWriter> dest_writer;
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Status s =
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WritableFileWriter::Create(env->GetFileSystem(), testFileName,
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FileOptions(soptions_), &dest_writer, nullptr);
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if (!s.ok()) {
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return s;
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}
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BlockBasedTableOptions table_options;
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table_options.block_size = block_size;
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BlockBasedTableFactory block_based_tf(table_options);
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std::unique_ptr<TableBuilder> table_builder;
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table_builder.reset(block_based_tf.NewTableBuilder(
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tb_options,
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dest_writer.get()));
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std::unique_ptr<InternalIterator> iter(table_reader_->NewIterator(
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read_options_, moptions_.prefix_extractor.get(), /*arena=*/nullptr,
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/*skip_filters=*/false, TableReaderCaller::kSSTDumpTool));
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for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
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table_builder->Add(iter->key(), iter->value());
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}
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s = iter->status();
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if (!s.ok()) {
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return s;
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}
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s = table_builder->Finish();
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if (!s.ok()) {
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return s;
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}
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*compressed_table_size = table_builder->FileSize();
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assert(num_data_blocks != nullptr);
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*num_data_blocks = table_builder->GetTableProperties().num_data_blocks;
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return env->DeleteFile(testFileName);
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}
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Status SstFileDumper::ShowAllCompressionSizes(
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size_t block_size,
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const std::vector<std::pair<CompressionType, const char*>>&
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compression_types,
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int32_t compress_level_from, int32_t compress_level_to,
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uint32_t max_dict_bytes, uint32_t zstd_max_train_bytes,
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uint64_t max_dict_buffer_bytes) {
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fprintf(stdout, "Block Size: %" ROCKSDB_PRIszt "\n", block_size);
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for (auto& i : compression_types) {
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if (CompressionTypeSupported(i.first)) {
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fprintf(stdout, "Compression: %-24s\n", i.second);
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CompressionOptions compress_opt;
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compress_opt.max_dict_bytes = max_dict_bytes;
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compress_opt.zstd_max_train_bytes = zstd_max_train_bytes;
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compress_opt.max_dict_buffer_bytes = max_dict_buffer_bytes;
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for (int32_t j = compress_level_from; j <= compress_level_to; j++) {
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fprintf(stdout, "Compression level: %d", j);
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compress_opt.level = j;
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Status s = ShowCompressionSize(block_size, i.first, compress_opt);
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if (!s.ok()) {
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return s;
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}
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}
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} else {
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fprintf(stdout, "Unsupported compression type: %s.\n", i.second);
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}
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}
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return Status::OK();
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}
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Status SstFileDumper::ShowCompressionSize(
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size_t block_size, CompressionType compress_type,
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const CompressionOptions& compress_opt) {
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Options opts;
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opts.statistics = ROCKSDB_NAMESPACE::CreateDBStatistics();
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opts.statistics->set_stats_level(StatsLevel::kAll);
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const ImmutableOptions imoptions(opts);
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const ColumnFamilyOptions cfo(opts);
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const MutableCFOptions moptions(cfo);
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ROCKSDB_NAMESPACE::InternalKeyComparator ikc(opts.comparator);
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IntTblPropCollectorFactories block_based_table_factories;
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std::string column_family_name;
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int unknown_level = -1;
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TableBuilderOptions tb_opts(
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imoptions, moptions, ikc, &block_based_table_factories, compress_type,
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compress_opt,
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TablePropertiesCollectorFactory::Context::kUnknownColumnFamily,
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column_family_name, unknown_level);
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uint64_t num_data_blocks = 0;
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std::chrono::steady_clock::time_point start =
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std::chrono::steady_clock::now();
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uint64_t file_size;
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Status s = CalculateCompressedTableSize(tb_opts, block_size, &num_data_blocks,
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&file_size);
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if (!s.ok()) {
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return s;
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}
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std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
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fprintf(stdout, " Size: %10" PRIu64, file_size);
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fprintf(stdout, " Blocks: %6" PRIu64, num_data_blocks);
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fprintf(stdout, " Time Taken: %10s microsecs",
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std::to_string(
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std::chrono::duration_cast<std::chrono::microseconds>(end - start)
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.count())
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.c_str());
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const uint64_t compressed_blocks =
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opts.statistics->getAndResetTickerCount(NUMBER_BLOCK_COMPRESSED);
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const uint64_t not_compressed_blocks =
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opts.statistics->getAndResetTickerCount(NUMBER_BLOCK_NOT_COMPRESSED);
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// When the option enable_index_compression is true,
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// NUMBER_BLOCK_COMPRESSED is incremented for index block(s).
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if ((compressed_blocks + not_compressed_blocks) > num_data_blocks) {
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num_data_blocks = compressed_blocks + not_compressed_blocks;
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}
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const uint64_t ratio_not_compressed_blocks =
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(num_data_blocks - compressed_blocks) - not_compressed_blocks;
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const double compressed_pcnt =
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(0 == num_data_blocks) ? 0.0
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: ((static_cast<double>(compressed_blocks) /
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static_cast<double>(num_data_blocks)) *
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100.0);
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const double ratio_not_compressed_pcnt =
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(0 == num_data_blocks)
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? 0.0
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: ((static_cast<double>(ratio_not_compressed_blocks) /
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static_cast<double>(num_data_blocks)) *
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100.0);
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const double not_compressed_pcnt =
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(0 == num_data_blocks) ? 0.0
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: ((static_cast<double>(not_compressed_blocks) /
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static_cast<double>(num_data_blocks)) *
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100.0);
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fprintf(stdout, " Compressed: %6" PRIu64 " (%5.1f%%)", compressed_blocks,
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compressed_pcnt);
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fprintf(stdout, " Not compressed (ratio): %6" PRIu64 " (%5.1f%%)",
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ratio_not_compressed_blocks, ratio_not_compressed_pcnt);
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fprintf(stdout, " Not compressed (abort): %6" PRIu64 " (%5.1f%%)\n",
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not_compressed_blocks, not_compressed_pcnt);
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return Status::OK();
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}
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Status SstFileDumper::ReadTableProperties(uint64_t table_magic_number,
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RandomAccessFileReader* file,
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uint64_t file_size,
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FilePrefetchBuffer* prefetch_buffer) {
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TableProperties* table_properties = nullptr;
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Status s = ROCKSDB_NAMESPACE::ReadTableProperties(
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file, file_size, table_magic_number, ioptions_, &table_properties,
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/* compression_type_missing= */ false,
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/* memory_allocator= */ nullptr, prefetch_buffer);
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if (s.ok()) {
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table_properties_.reset(table_properties);
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} else {
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if (!silent_) {
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fprintf(stdout, "Not able to read table properties\n");
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}
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}
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return s;
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}
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Status SstFileDumper::SetTableOptionsByMagicNumber(
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uint64_t table_magic_number) {
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assert(table_properties_);
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if (table_magic_number == kBlockBasedTableMagicNumber ||
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table_magic_number == kLegacyBlockBasedTableMagicNumber) {
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BlockBasedTableFactory* bbtf = new BlockBasedTableFactory();
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// To force tail prefetching, we fake reporting two useful reads of 512KB
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// from the tail.
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// It needs at least two data points to warm up the stats.
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bbtf->tail_prefetch_stats()->RecordEffectiveSize(512 * 1024);
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bbtf->tail_prefetch_stats()->RecordEffectiveSize(512 * 1024);
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options_.table_factory.reset(bbtf);
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if (!silent_) {
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fprintf(stdout, "Sst file format: block-based\n");
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}
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auto& props = table_properties_->user_collected_properties;
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auto pos = props.find(BlockBasedTablePropertyNames::kIndexType);
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if (pos != props.end()) {
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auto index_type_on_file = static_cast<BlockBasedTableOptions::IndexType>(
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DecodeFixed32(pos->second.c_str()));
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if (index_type_on_file ==
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BlockBasedTableOptions::IndexType::kHashSearch) {
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options_.prefix_extractor.reset(NewNoopTransform());
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}
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}
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} else if (table_magic_number == kPlainTableMagicNumber ||
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table_magic_number == kLegacyPlainTableMagicNumber) {
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options_.allow_mmap_reads = true;
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PlainTableOptions plain_table_options;
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plain_table_options.user_key_len = kPlainTableVariableLength;
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plain_table_options.bloom_bits_per_key = 0;
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plain_table_options.hash_table_ratio = 0;
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plain_table_options.index_sparseness = 1;
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plain_table_options.huge_page_tlb_size = 0;
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plain_table_options.encoding_type = kPlain;
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plain_table_options.full_scan_mode = true;
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options_.table_factory.reset(NewPlainTableFactory(plain_table_options));
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if (!silent_) {
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fprintf(stdout, "Sst file format: plain table\n");
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}
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} else {
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char error_msg_buffer[80];
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snprintf(error_msg_buffer, sizeof(error_msg_buffer) - 1,
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"Unsupported table magic number --- %lx",
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(long)table_magic_number);
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return Status::InvalidArgument(error_msg_buffer);
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}
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return Status::OK();
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}
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Status SstFileDumper::SetOldTableOptions() {
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assert(table_properties_ == nullptr);
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options_.table_factory = std::make_shared<BlockBasedTableFactory>();
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if (!silent_) {
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fprintf(stdout, "Sst file format: block-based(old version)\n");
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}
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return Status::OK();
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}
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Status SstFileDumper::ReadSequential(bool print_kv, uint64_t read_num,
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bool has_from, const std::string& from_key,
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bool has_to, const std::string& to_key,
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bool use_from_as_prefix) {
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if (!table_reader_) {
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return init_result_;
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}
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InternalIterator* iter = table_reader_->NewIterator(
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read_options_, moptions_.prefix_extractor.get(),
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/*arena=*/nullptr, /*skip_filters=*/false,
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TableReaderCaller::kSSTDumpTool);
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uint64_t i = 0;
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if (has_from) {
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InternalKey ikey;
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ikey.SetMinPossibleForUserKey(from_key);
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iter->Seek(ikey.Encode());
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} else {
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iter->SeekToFirst();
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}
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for (; iter->Valid(); iter->Next()) {
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Slice key = iter->key();
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Slice value = iter->value();
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++i;
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if (read_num > 0 && i > read_num) break;
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ParsedInternalKey ikey;
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Status pik_status = ParseInternalKey(key, &ikey, true /* log_err_key */);
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if (!pik_status.ok()) {
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std::cerr << pik_status.getState() << "\n";
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continue;
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}
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// the key returned is not prefixed with out 'from' key
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|
if (use_from_as_prefix && !ikey.user_key.starts_with(from_key)) {
|
|
break;
|
|
}
|
|
|
|
// If end marker was specified, we stop before it
|
|
if (has_to && BytewiseComparator()->Compare(ikey.user_key, to_key) >= 0) {
|
|
break;
|
|
}
|
|
|
|
if (print_kv) {
|
|
if (!decode_blob_index_ || ikey.type != kTypeBlobIndex) {
|
|
fprintf(stdout, "%s => %s\n",
|
|
ikey.DebugString(true, output_hex_).c_str(),
|
|
value.ToString(output_hex_).c_str());
|
|
} else {
|
|
BlobIndex blob_index;
|
|
|
|
const Status s = blob_index.DecodeFrom(value);
|
|
if (!s.ok()) {
|
|
fprintf(stderr, "%s => error decoding blob index\n",
|
|
ikey.DebugString(true, output_hex_).c_str());
|
|
continue;
|
|
}
|
|
|
|
fprintf(stdout, "%s => %s\n",
|
|
ikey.DebugString(true, output_hex_).c_str(),
|
|
blob_index.DebugString(output_hex_).c_str());
|
|
}
|
|
}
|
|
}
|
|
|
|
read_num_ += i;
|
|
|
|
Status ret = iter->status();
|
|
delete iter;
|
|
return ret;
|
|
}
|
|
|
|
Status SstFileDumper::ReadTableProperties(
|
|
std::shared_ptr<const TableProperties>* table_properties) {
|
|
if (!table_reader_) {
|
|
return init_result_;
|
|
}
|
|
|
|
*table_properties = table_reader_->GetTableProperties();
|
|
return init_result_;
|
|
}
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|
|
#endif // ROCKSDB_LITE
|
|
|