31da5e34c1
Summary: Based on https://github.com/facebook/rocksdb/issues/6648 (CLA Signed), but heavily modified / extended: * Implicit capture of this via [=] deprecated in C++20, and [=,this] not standard before C++20 -> now using explicit capture lists * Implicit copy operator deprecated in gcc 9 -> add explicit '= default' definition * std::random_shuffle deprecated in C++17 and removed in C++20 -> migrated to a replacement in RocksDB random.h API * Add the ability to build with different std version though -DCMAKE_CXX_STANDARD=11/14/17/20 on the cmake command line * Minimal rebuild flag of MSVC is deprecated and is forbidden with /std:c++latest (C++20) * Added MSVC 2019 C++11 & MSVC 2019 C++20 in AppVeyor * Added GCC 9 C++11 & GCC9 C++20 in Travis Pull Request resolved: https://github.com/facebook/rocksdb/pull/6697 Test Plan: make check and CI Reviewed By: cheng-chang Differential Revision: D21020318 Pulled By: pdillinger fbshipit-source-id: 12311be5dbd8675a0e2c817f7ec50fa11c18ab91
1703 lines
64 KiB
C++
1703 lines
64 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "table/block_based/block_based_table_builder.h"
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#include <assert.h>
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#include <stdio.h>
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#include <atomic>
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#include <list>
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#include <map>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <utility>
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#include "db/dbformat.h"
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#include "index_builder.h"
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#include "port/lang.h"
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#include "rocksdb/cache.h"
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#include "rocksdb/comparator.h"
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#include "rocksdb/env.h"
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#include "rocksdb/flush_block_policy.h"
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#include "rocksdb/merge_operator.h"
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#include "rocksdb/table.h"
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#include "table/block_based/block.h"
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#include "table/block_based/block_based_filter_block.h"
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#include "table/block_based/block_based_table_factory.h"
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#include "table/block_based/block_based_table_reader.h"
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#include "table/block_based/block_builder.h"
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#include "table/block_based/filter_block.h"
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#include "table/block_based/filter_policy_internal.h"
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#include "table/block_based/full_filter_block.h"
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#include "table/block_based/partitioned_filter_block.h"
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#include "table/format.h"
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#include "table/table_builder.h"
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#include "memory/memory_allocator.h"
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#include "util/coding.h"
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#include "util/compression.h"
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#include "util/crc32c.h"
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#include "util/stop_watch.h"
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#include "util/string_util.h"
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#include "util/work_queue.h"
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#include "util/xxhash.h"
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namespace ROCKSDB_NAMESPACE {
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extern const std::string kHashIndexPrefixesBlock;
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extern const std::string kHashIndexPrefixesMetadataBlock;
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typedef BlockBasedTableOptions::IndexType IndexType;
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// Without anonymous namespace here, we fail the warning -Wmissing-prototypes
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namespace {
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// Create a filter block builder based on its type.
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FilterBlockBuilder* CreateFilterBlockBuilder(
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const ImmutableCFOptions& /*opt*/, const MutableCFOptions& mopt,
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const FilterBuildingContext& context,
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const bool use_delta_encoding_for_index_values,
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PartitionedIndexBuilder* const p_index_builder) {
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const BlockBasedTableOptions& table_opt = context.table_options;
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if (table_opt.filter_policy == nullptr) return nullptr;
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FilterBitsBuilder* filter_bits_builder =
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BloomFilterPolicy::GetBuilderFromContext(context);
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if (filter_bits_builder == nullptr) {
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return new BlockBasedFilterBlockBuilder(mopt.prefix_extractor.get(),
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table_opt);
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} else {
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if (table_opt.partition_filters) {
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assert(p_index_builder != nullptr);
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// Since after partition cut request from filter builder it takes time
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// until index builder actully cuts the partition, we take the lower bound
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// as partition size.
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assert(table_opt.block_size_deviation <= 100);
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auto partition_size =
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static_cast<uint32_t>(((table_opt.metadata_block_size *
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(100 - table_opt.block_size_deviation)) +
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99) /
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100);
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partition_size = std::max(partition_size, static_cast<uint32_t>(1));
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return new PartitionedFilterBlockBuilder(
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mopt.prefix_extractor.get(), table_opt.whole_key_filtering,
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filter_bits_builder, table_opt.index_block_restart_interval,
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use_delta_encoding_for_index_values, p_index_builder, partition_size);
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} else {
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return new FullFilterBlockBuilder(mopt.prefix_extractor.get(),
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table_opt.whole_key_filtering,
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filter_bits_builder);
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}
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}
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}
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bool GoodCompressionRatio(size_t compressed_size, size_t raw_size) {
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// Check to see if compressed less than 12.5%
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return compressed_size < raw_size - (raw_size / 8u);
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}
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bool CompressBlockInternal(const Slice& raw,
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const CompressionInfo& compression_info,
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uint32_t format_version,
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std::string* compressed_output) {
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// Will return compressed block contents if (1) the compression method is
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// supported in this platform and (2) the compression rate is "good enough".
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switch (compression_info.type()) {
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case kSnappyCompression:
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return Snappy_Compress(compression_info, raw.data(), raw.size(),
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compressed_output);
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case kZlibCompression:
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return Zlib_Compress(
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compression_info,
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GetCompressFormatForVersion(kZlibCompression, format_version),
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raw.data(), raw.size(), compressed_output);
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case kBZip2Compression:
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return BZip2_Compress(
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compression_info,
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GetCompressFormatForVersion(kBZip2Compression, format_version),
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raw.data(), raw.size(), compressed_output);
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case kLZ4Compression:
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return LZ4_Compress(
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compression_info,
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GetCompressFormatForVersion(kLZ4Compression, format_version),
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raw.data(), raw.size(), compressed_output);
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case kLZ4HCCompression:
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return LZ4HC_Compress(
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compression_info,
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GetCompressFormatForVersion(kLZ4HCCompression, format_version),
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raw.data(), raw.size(), compressed_output);
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case kXpressCompression:
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return XPRESS_Compress(raw.data(), raw.size(), compressed_output);
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case kZSTD:
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case kZSTDNotFinalCompression:
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return ZSTD_Compress(compression_info, raw.data(), raw.size(),
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compressed_output);
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default:
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// Do not recognize this compression type
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return false;
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}
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}
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} // namespace
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// format_version is the block format as defined in include/rocksdb/table.h
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Slice CompressBlock(const Slice& raw, const CompressionInfo& info,
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CompressionType* type, uint32_t format_version,
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bool do_sample, std::string* compressed_output,
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std::string* sampled_output_fast,
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std::string* sampled_output_slow) {
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*type = info.type();
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if (info.type() == kNoCompression && !info.SampleForCompression()) {
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return raw;
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}
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// If requested, we sample one in every N block with a
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// fast and slow compression algorithm and report the stats.
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// The users can use these stats to decide if it is worthwhile
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// enabling compression and they also get a hint about which
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// compression algorithm wil be beneficial.
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if (do_sample && info.SampleForCompression() &&
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Random::GetTLSInstance()->OneIn((int)info.SampleForCompression()) &&
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sampled_output_fast && sampled_output_slow) {
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// Sampling with a fast compression algorithm
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if (LZ4_Supported() || Snappy_Supported()) {
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CompressionType c =
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LZ4_Supported() ? kLZ4Compression : kSnappyCompression;
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CompressionContext context(c);
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CompressionOptions options;
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CompressionInfo info_tmp(options, context,
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CompressionDict::GetEmptyDict(), c,
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info.SampleForCompression());
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CompressBlockInternal(raw, info_tmp, format_version, sampled_output_fast);
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}
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// Sampling with a slow but high-compression algorithm
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if (ZSTD_Supported() || Zlib_Supported()) {
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CompressionType c = ZSTD_Supported() ? kZSTD : kZlibCompression;
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CompressionContext context(c);
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CompressionOptions options;
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CompressionInfo info_tmp(options, context,
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CompressionDict::GetEmptyDict(), c,
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info.SampleForCompression());
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CompressBlockInternal(raw, info_tmp, format_version, sampled_output_slow);
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}
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}
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// Actually compress the data
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if (*type != kNoCompression) {
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if (CompressBlockInternal(raw, info, format_version, compressed_output) &&
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GoodCompressionRatio(compressed_output->size(), raw.size())) {
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return *compressed_output;
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}
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}
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// Compression method is not supported, or not good
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// compression ratio, so just fall back to uncompressed form.
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*type = kNoCompression;
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return raw;
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}
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// kBlockBasedTableMagicNumber was picked by running
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// echo rocksdb.table.block_based | sha1sum
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// and taking the leading 64 bits.
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// Please note that kBlockBasedTableMagicNumber may also be accessed by other
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// .cc files
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// for that reason we declare it extern in the header but to get the space
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// allocated
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// it must be not extern in one place.
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const uint64_t kBlockBasedTableMagicNumber = 0x88e241b785f4cff7ull;
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// We also support reading and writing legacy block based table format (for
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// backwards compatibility)
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const uint64_t kLegacyBlockBasedTableMagicNumber = 0xdb4775248b80fb57ull;
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// A collector that collects properties of interest to block-based table.
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// For now this class looks heavy-weight since we only write one additional
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// property.
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// But in the foreseeable future, we will add more and more properties that are
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// specific to block-based table.
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class BlockBasedTableBuilder::BlockBasedTablePropertiesCollector
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: public IntTblPropCollector {
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public:
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explicit BlockBasedTablePropertiesCollector(
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BlockBasedTableOptions::IndexType index_type, bool whole_key_filtering,
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bool prefix_filtering)
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: index_type_(index_type),
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whole_key_filtering_(whole_key_filtering),
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prefix_filtering_(prefix_filtering) {}
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Status InternalAdd(const Slice& /*key*/, const Slice& /*value*/,
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uint64_t /*file_size*/) override {
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// Intentionally left blank. Have no interest in collecting stats for
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// individual key/value pairs.
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return Status::OK();
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}
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virtual void BlockAdd(uint64_t /* blockRawBytes */,
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uint64_t /* blockCompressedBytesFast */,
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uint64_t /* blockCompressedBytesSlow */) override {
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// Intentionally left blank. No interest in collecting stats for
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// blocks.
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return;
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}
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Status Finish(UserCollectedProperties* properties) override {
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std::string val;
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PutFixed32(&val, static_cast<uint32_t>(index_type_));
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properties->insert({BlockBasedTablePropertyNames::kIndexType, val});
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properties->insert({BlockBasedTablePropertyNames::kWholeKeyFiltering,
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whole_key_filtering_ ? kPropTrue : kPropFalse});
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properties->insert({BlockBasedTablePropertyNames::kPrefixFiltering,
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prefix_filtering_ ? kPropTrue : kPropFalse});
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return Status::OK();
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}
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// The name of the properties collector can be used for debugging purpose.
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const char* Name() const override {
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return "BlockBasedTablePropertiesCollector";
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}
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UserCollectedProperties GetReadableProperties() const override {
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// Intentionally left blank.
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return UserCollectedProperties();
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}
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private:
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BlockBasedTableOptions::IndexType index_type_;
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bool whole_key_filtering_;
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bool prefix_filtering_;
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};
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struct BlockBasedTableBuilder::Rep {
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const ImmutableCFOptions ioptions;
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const MutableCFOptions moptions;
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const BlockBasedTableOptions table_options;
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const InternalKeyComparator& internal_comparator;
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WritableFileWriter* file;
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std::atomic<uint64_t> offset;
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Status status;
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IOStatus io_status;
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// Synchronize status & io_status accesses across threads from main thread,
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// compression thread and write thread in parallel compression.
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std::mutex status_mutex;
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std::mutex io_status_mutex;
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size_t alignment;
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BlockBuilder data_block;
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// Buffers uncompressed data blocks and keys to replay later. Needed when
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// compression dictionary is enabled so we can finalize the dictionary before
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// compressing any data blocks.
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// TODO(ajkr): ideally we don't buffer all keys and all uncompressed data
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// blocks as it's redundant, but it's easier to implement for now.
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std::vector<std::pair<std::string, std::vector<std::string>>>
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data_block_and_keys_buffers;
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BlockBuilder range_del_block;
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InternalKeySliceTransform internal_prefix_transform;
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std::unique_ptr<IndexBuilder> index_builder;
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PartitionedIndexBuilder* p_index_builder_ = nullptr;
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std::string last_key;
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const Slice* first_key_in_next_block = nullptr;
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CompressionType compression_type;
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uint64_t sample_for_compression;
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CompressionOptions compression_opts;
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std::unique_ptr<CompressionDict> compression_dict;
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std::vector<std::unique_ptr<CompressionContext>> compression_ctxs;
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std::vector<std::unique_ptr<UncompressionContext>> verify_ctxs;
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std::unique_ptr<UncompressionDict> verify_dict;
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size_t data_begin_offset = 0;
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TableProperties props;
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// States of the builder.
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//
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// - `kBuffered`: This is the initial state where zero or more data blocks are
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// accumulated uncompressed in-memory. From this state, call
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// `EnterUnbuffered()` to finalize the compression dictionary if enabled,
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// compress/write out any buffered blocks, and proceed to the `kUnbuffered`
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// state.
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//
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// - `kUnbuffered`: This is the state when compression dictionary is finalized
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// either because it wasn't enabled in the first place or it's been created
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// from sampling previously buffered data. In this state, blocks are simply
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// compressed/written out as they fill up. From this state, call `Finish()`
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// to complete the file (write meta-blocks, etc.), or `Abandon()` to delete
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// the partially created file.
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//
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// - `kClosed`: This indicates either `Finish()` or `Abandon()` has been
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// called, so the table builder is no longer usable. We must be in this
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// state by the time the destructor runs.
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enum class State {
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kBuffered,
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kUnbuffered,
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kClosed,
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};
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State state;
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const bool use_delta_encoding_for_index_values;
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std::unique_ptr<FilterBlockBuilder> filter_builder;
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char compressed_cache_key_prefix[BlockBasedTable::kMaxCacheKeyPrefixSize];
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size_t compressed_cache_key_prefix_size;
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BlockHandle pending_handle; // Handle to add to index block
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std::string compressed_output;
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std::unique_ptr<FlushBlockPolicy> flush_block_policy;
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int level_at_creation;
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uint32_t column_family_id;
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const std::string& column_family_name;
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uint64_t creation_time = 0;
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uint64_t oldest_key_time = 0;
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const uint64_t target_file_size;
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uint64_t file_creation_time = 0;
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std::vector<std::unique_ptr<IntTblPropCollector>> table_properties_collectors;
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std::unique_ptr<ParallelCompressionRep> pc_rep;
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uint64_t get_offset() { return offset.load(std::memory_order_relaxed); }
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void set_offset(uint64_t o) { offset.store(o, std::memory_order_relaxed); }
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Rep(const ImmutableCFOptions& _ioptions, const MutableCFOptions& _moptions,
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const BlockBasedTableOptions& table_opt,
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const InternalKeyComparator& icomparator,
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const std::vector<std::unique_ptr<IntTblPropCollectorFactory>>*
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int_tbl_prop_collector_factories,
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uint32_t _column_family_id, WritableFileWriter* f,
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const CompressionType _compression_type,
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const uint64_t _sample_for_compression,
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const CompressionOptions& _compression_opts, const bool skip_filters,
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const int _level_at_creation, const std::string& _column_family_name,
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const uint64_t _creation_time, const uint64_t _oldest_key_time,
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const uint64_t _target_file_size, const uint64_t _file_creation_time)
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: ioptions(_ioptions),
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moptions(_moptions),
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table_options(table_opt),
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internal_comparator(icomparator),
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file(f),
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offset(0),
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alignment(table_options.block_align
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? std::min(table_options.block_size, kDefaultPageSize)
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: 0),
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data_block(table_options.block_restart_interval,
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table_options.use_delta_encoding,
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false /* use_value_delta_encoding */,
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icomparator.user_comparator()
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->CanKeysWithDifferentByteContentsBeEqual()
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? BlockBasedTableOptions::kDataBlockBinarySearch
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: table_options.data_block_index_type,
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table_options.data_block_hash_table_util_ratio),
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range_del_block(1 /* block_restart_interval */),
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internal_prefix_transform(_moptions.prefix_extractor.get()),
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compression_type(_compression_type),
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sample_for_compression(_sample_for_compression),
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compression_opts(_compression_opts),
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compression_dict(),
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compression_ctxs(_compression_opts.parallel_threads),
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verify_ctxs(_compression_opts.parallel_threads),
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verify_dict(),
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state((_compression_opts.max_dict_bytes > 0) ? State::kBuffered
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: State::kUnbuffered),
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use_delta_encoding_for_index_values(table_opt.format_version >= 4 &&
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!table_opt.block_align),
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compressed_cache_key_prefix_size(0),
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flush_block_policy(
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table_options.flush_block_policy_factory->NewFlushBlockPolicy(
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table_options, data_block)),
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level_at_creation(_level_at_creation),
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column_family_id(_column_family_id),
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column_family_name(_column_family_name),
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creation_time(_creation_time),
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oldest_key_time(_oldest_key_time),
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target_file_size(_target_file_size),
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file_creation_time(_file_creation_time) {
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for (uint32_t i = 0; i < compression_opts.parallel_threads; i++) {
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compression_ctxs[i].reset(new CompressionContext(compression_type));
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}
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if (table_options.index_type ==
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BlockBasedTableOptions::kTwoLevelIndexSearch) {
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p_index_builder_ = PartitionedIndexBuilder::CreateIndexBuilder(
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&internal_comparator, use_delta_encoding_for_index_values,
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table_options);
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index_builder.reset(p_index_builder_);
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} else {
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index_builder.reset(IndexBuilder::CreateIndexBuilder(
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table_options.index_type, &internal_comparator,
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&this->internal_prefix_transform, use_delta_encoding_for_index_values,
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table_options));
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}
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if (skip_filters) {
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filter_builder = nullptr;
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} else {
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FilterBuildingContext context(table_options);
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context.column_family_name = column_family_name;
|
|
context.compaction_style = ioptions.compaction_style;
|
|
context.level_at_creation = level_at_creation;
|
|
context.info_log = ioptions.info_log;
|
|
filter_builder.reset(CreateFilterBlockBuilder(
|
|
ioptions, moptions, context, use_delta_encoding_for_index_values,
|
|
p_index_builder_));
|
|
}
|
|
|
|
for (auto& collector_factories : *int_tbl_prop_collector_factories) {
|
|
table_properties_collectors.emplace_back(
|
|
collector_factories->CreateIntTblPropCollector(column_family_id));
|
|
}
|
|
table_properties_collectors.emplace_back(
|
|
new BlockBasedTablePropertiesCollector(
|
|
table_options.index_type, table_options.whole_key_filtering,
|
|
_moptions.prefix_extractor != nullptr));
|
|
if (table_options.verify_compression) {
|
|
for (uint32_t i = 0; i < compression_opts.parallel_threads; i++) {
|
|
verify_ctxs[i].reset(new UncompressionContext(
|
|
UncompressionContext::NoCache(), compression_type));
|
|
}
|
|
}
|
|
}
|
|
|
|
Rep(const Rep&) = delete;
|
|
Rep& operator=(const Rep&) = delete;
|
|
|
|
~Rep() {}
|
|
};
|
|
|
|
struct BlockBasedTableBuilder::ParallelCompressionRep {
|
|
// Keys is a wrapper of vector of strings avoiding
|
|
// releasing string memories during vector clear()
|
|
// in order to save memory allocation overhead
|
|
class Keys {
|
|
public:
|
|
Keys() : keys_(kKeysInitSize), size_(0) {}
|
|
void PushBack(const Slice& key) {
|
|
if (size_ == keys_.size()) {
|
|
keys_.emplace_back(key.data(), key.size());
|
|
} else {
|
|
keys_[size_].assign(key.data(), key.size());
|
|
}
|
|
size_++;
|
|
}
|
|
void SwapAssign(std::vector<std::string>& keys) {
|
|
size_ = keys.size();
|
|
std::swap(keys_, keys);
|
|
}
|
|
void Clear() { size_ = 0; }
|
|
size_t Size() { return size_; }
|
|
std::string& Back() { return keys_[size_ - 1]; }
|
|
std::string& operator[](size_t idx) {
|
|
assert(idx < size_);
|
|
return keys_[idx];
|
|
}
|
|
|
|
private:
|
|
const size_t kKeysInitSize = 32;
|
|
std::vector<std::string> keys_;
|
|
size_t size_;
|
|
};
|
|
std::unique_ptr<Keys> curr_block_keys;
|
|
|
|
class BlockRepSlot;
|
|
|
|
// BlockRep instances are fetched from and recycled to
|
|
// block_rep_pool during parallel compression.
|
|
struct BlockRep {
|
|
Slice contents;
|
|
std::unique_ptr<std::string> data;
|
|
std::unique_ptr<std::string> compressed_data;
|
|
CompressionType compression_type;
|
|
std::unique_ptr<std::string> first_key_in_next_block;
|
|
std::unique_ptr<Keys> keys;
|
|
std::unique_ptr<BlockRepSlot> slot;
|
|
Status status;
|
|
};
|
|
// Use a vector of BlockRep as a buffer for a determined number
|
|
// of BlockRep structures. All data referenced by pointers in
|
|
// BlockRep will be freed when this vector is destructed.
|
|
typedef std::vector<BlockRep> BlockRepBuffer;
|
|
BlockRepBuffer block_rep_buf;
|
|
// Use a thread-safe queue for concurrent access from block
|
|
// building thread and writer thread.
|
|
typedef WorkQueue<BlockRep*> BlockRepPool;
|
|
BlockRepPool block_rep_pool;
|
|
|
|
// Use BlockRepSlot to keep block order in write thread.
|
|
// slot_ will pass references to BlockRep
|
|
class BlockRepSlot {
|
|
public:
|
|
BlockRepSlot() : slot_(1) {}
|
|
template <typename T>
|
|
void Fill(T&& rep) {
|
|
slot_.push(std::forward<T>(rep));
|
|
};
|
|
void Take(BlockRep*& rep) { slot_.pop(rep); }
|
|
|
|
private:
|
|
// slot_ will pass references to BlockRep in block_rep_buf,
|
|
// and those references are always valid before the destruction of
|
|
// block_rep_buf.
|
|
WorkQueue<BlockRep*> slot_;
|
|
};
|
|
|
|
// Compression queue will pass references to BlockRep in block_rep_buf,
|
|
// and those references are always valid before the destruction of
|
|
// block_rep_buf.
|
|
typedef WorkQueue<BlockRep*> CompressQueue;
|
|
CompressQueue compress_queue;
|
|
std::vector<port::Thread> compress_thread_pool;
|
|
|
|
// Write queue will pass references to BlockRep::slot in block_rep_buf,
|
|
// and those references are always valid before the corresponding
|
|
// BlockRep::slot is destructed, which is before the destruction of
|
|
// block_rep_buf.
|
|
typedef WorkQueue<BlockRepSlot*> WriteQueue;
|
|
WriteQueue write_queue;
|
|
std::unique_ptr<port::Thread> write_thread;
|
|
|
|
// Raw bytes compressed so far.
|
|
uint64_t raw_bytes_compressed;
|
|
// Size of current block being appended.
|
|
uint64_t raw_bytes_curr_block;
|
|
// Raw bytes under compression and not appended yet.
|
|
std::atomic<uint64_t> raw_bytes_inflight;
|
|
// Number of blocks under compression and not appended yet.
|
|
std::atomic<uint64_t> blocks_inflight;
|
|
// Current compression ratio, maintained by BGWorkWriteRawBlock.
|
|
std::atomic<double> curr_compression_ratio;
|
|
// Estimated SST file size.
|
|
std::atomic<uint64_t> estimated_file_size;
|
|
|
|
// Wait for the completion of first block compression to get a
|
|
// non-zero compression ratio.
|
|
bool first_block;
|
|
std::condition_variable first_block_cond;
|
|
std::mutex first_block_mutex;
|
|
|
|
bool finished;
|
|
|
|
ParallelCompressionRep(uint32_t parallel_threads)
|
|
: curr_block_keys(new Keys()),
|
|
block_rep_buf(parallel_threads),
|
|
block_rep_pool(parallel_threads),
|
|
compress_queue(parallel_threads),
|
|
write_queue(parallel_threads),
|
|
raw_bytes_compressed(0),
|
|
raw_bytes_curr_block(0),
|
|
raw_bytes_inflight(0),
|
|
blocks_inflight(0),
|
|
curr_compression_ratio(0),
|
|
estimated_file_size(0),
|
|
first_block(true),
|
|
finished(false) {
|
|
for (uint32_t i = 0; i < parallel_threads; i++) {
|
|
block_rep_buf[i].contents = Slice();
|
|
block_rep_buf[i].data.reset(new std::string());
|
|
block_rep_buf[i].compressed_data.reset(new std::string());
|
|
block_rep_buf[i].compression_type = CompressionType();
|
|
block_rep_buf[i].first_key_in_next_block.reset(new std::string());
|
|
block_rep_buf[i].keys.reset(new Keys());
|
|
block_rep_buf[i].slot.reset(new BlockRepSlot());
|
|
block_rep_buf[i].status = Status::OK();
|
|
block_rep_pool.push(&block_rep_buf[i]);
|
|
}
|
|
}
|
|
|
|
~ParallelCompressionRep() { block_rep_pool.finish(); }
|
|
};
|
|
|
|
BlockBasedTableBuilder::BlockBasedTableBuilder(
|
|
const ImmutableCFOptions& ioptions, const MutableCFOptions& moptions,
|
|
const BlockBasedTableOptions& table_options,
|
|
const InternalKeyComparator& internal_comparator,
|
|
const std::vector<std::unique_ptr<IntTblPropCollectorFactory>>*
|
|
int_tbl_prop_collector_factories,
|
|
uint32_t column_family_id, WritableFileWriter* file,
|
|
const CompressionType compression_type,
|
|
const uint64_t sample_for_compression,
|
|
const CompressionOptions& compression_opts, const bool skip_filters,
|
|
const std::string& column_family_name, const int level_at_creation,
|
|
const uint64_t creation_time, const uint64_t oldest_key_time,
|
|
const uint64_t target_file_size, const uint64_t file_creation_time) {
|
|
BlockBasedTableOptions sanitized_table_options(table_options);
|
|
if (sanitized_table_options.format_version == 0 &&
|
|
sanitized_table_options.checksum != kCRC32c) {
|
|
ROCKS_LOG_WARN(
|
|
ioptions.info_log,
|
|
"Silently converting format_version to 1 because checksum is "
|
|
"non-default");
|
|
// silently convert format_version to 1 to keep consistent with current
|
|
// behavior
|
|
sanitized_table_options.format_version = 1;
|
|
}
|
|
|
|
rep_ = new Rep(ioptions, moptions, sanitized_table_options,
|
|
internal_comparator, int_tbl_prop_collector_factories,
|
|
column_family_id, file, compression_type,
|
|
sample_for_compression, compression_opts, skip_filters,
|
|
level_at_creation, column_family_name, creation_time,
|
|
oldest_key_time, target_file_size, file_creation_time);
|
|
|
|
if (rep_->filter_builder != nullptr) {
|
|
rep_->filter_builder->StartBlock(0);
|
|
}
|
|
if (table_options.block_cache_compressed.get() != nullptr) {
|
|
BlockBasedTable::GenerateCachePrefix(
|
|
table_options.block_cache_compressed.get(), file->writable_file(),
|
|
&rep_->compressed_cache_key_prefix[0],
|
|
&rep_->compressed_cache_key_prefix_size);
|
|
}
|
|
|
|
if (rep_->compression_opts.parallel_threads > 1) {
|
|
rep_->pc_rep.reset(
|
|
new ParallelCompressionRep(rep_->compression_opts.parallel_threads));
|
|
rep_->pc_rep->compress_thread_pool.reserve(
|
|
rep_->compression_opts.parallel_threads);
|
|
for (uint32_t i = 0; i < rep_->compression_opts.parallel_threads; i++) {
|
|
rep_->pc_rep->compress_thread_pool.emplace_back([this, i] {
|
|
BGWorkCompression(*(rep_->compression_ctxs[i]),
|
|
rep_->verify_ctxs[i].get());
|
|
});
|
|
}
|
|
rep_->pc_rep->write_thread.reset(
|
|
new port::Thread([this] { BGWorkWriteRawBlock(); }));
|
|
}
|
|
}
|
|
|
|
BlockBasedTableBuilder::~BlockBasedTableBuilder() {
|
|
// Catch errors where caller forgot to call Finish()
|
|
assert(rep_->state == Rep::State::kClosed);
|
|
delete rep_;
|
|
}
|
|
|
|
void BlockBasedTableBuilder::Add(const Slice& key, const Slice& value) {
|
|
Rep* r = rep_;
|
|
assert(rep_->state != Rep::State::kClosed);
|
|
if (!ok()) return;
|
|
ValueType value_type = ExtractValueType(key);
|
|
if (IsValueType(value_type)) {
|
|
#ifndef NDEBUG
|
|
if (r->props.num_entries > r->props.num_range_deletions) {
|
|
assert(r->internal_comparator.Compare(key, Slice(r->last_key)) > 0);
|
|
}
|
|
#endif // NDEBUG
|
|
|
|
auto should_flush = r->flush_block_policy->Update(key, value);
|
|
if (should_flush) {
|
|
assert(!r->data_block.empty());
|
|
r->first_key_in_next_block = &key;
|
|
Flush();
|
|
|
|
if (r->state == Rep::State::kBuffered &&
|
|
r->data_begin_offset > r->target_file_size) {
|
|
EnterUnbuffered();
|
|
}
|
|
|
|
// Add item to index block.
|
|
// We do not emit the index entry for a block until we have seen the
|
|
// first key for the next data block. This allows us to use shorter
|
|
// keys in the index block. For example, consider a block boundary
|
|
// between the keys "the quick brown fox" and "the who". We can use
|
|
// "the r" as the key for the index block entry since it is >= all
|
|
// entries in the first block and < all entries in subsequent
|
|
// blocks.
|
|
if (ok() && r->state == Rep::State::kUnbuffered) {
|
|
if (r->compression_opts.parallel_threads > 1) {
|
|
r->pc_rep->curr_block_keys->Clear();
|
|
} else {
|
|
r->index_builder->AddIndexEntry(&r->last_key, &key,
|
|
r->pending_handle);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Note: PartitionedFilterBlockBuilder requires key being added to filter
|
|
// builder after being added to index builder.
|
|
if (r->state == Rep::State::kUnbuffered) {
|
|
if (r->compression_opts.parallel_threads > 1) {
|
|
r->pc_rep->curr_block_keys->PushBack(key);
|
|
} else {
|
|
if (r->filter_builder != nullptr) {
|
|
size_t ts_sz =
|
|
r->internal_comparator.user_comparator()->timestamp_size();
|
|
r->filter_builder->Add(ExtractUserKeyAndStripTimestamp(key, ts_sz));
|
|
}
|
|
}
|
|
}
|
|
|
|
r->last_key.assign(key.data(), key.size());
|
|
r->data_block.Add(key, value);
|
|
if (r->state == Rep::State::kBuffered) {
|
|
// Buffer keys to be replayed during `Finish()` once compression
|
|
// dictionary has been finalized.
|
|
if (r->data_block_and_keys_buffers.empty() || should_flush) {
|
|
r->data_block_and_keys_buffers.emplace_back();
|
|
}
|
|
r->data_block_and_keys_buffers.back().second.emplace_back(key.ToString());
|
|
} else {
|
|
if (r->compression_opts.parallel_threads == 1) {
|
|
r->index_builder->OnKeyAdded(key);
|
|
}
|
|
}
|
|
// TODO offset passed in is not accurate for parallel compression case
|
|
NotifyCollectTableCollectorsOnAdd(key, value, r->get_offset(),
|
|
r->table_properties_collectors,
|
|
r->ioptions.info_log);
|
|
|
|
} else if (value_type == kTypeRangeDeletion) {
|
|
r->range_del_block.Add(key, value);
|
|
// TODO offset passed in is not accurate for parallel compression case
|
|
NotifyCollectTableCollectorsOnAdd(key, value, r->get_offset(),
|
|
r->table_properties_collectors,
|
|
r->ioptions.info_log);
|
|
} else {
|
|
assert(false);
|
|
}
|
|
|
|
r->props.num_entries++;
|
|
r->props.raw_key_size += key.size();
|
|
r->props.raw_value_size += value.size();
|
|
if (value_type == kTypeDeletion || value_type == kTypeSingleDeletion) {
|
|
r->props.num_deletions++;
|
|
} else if (value_type == kTypeRangeDeletion) {
|
|
r->props.num_deletions++;
|
|
r->props.num_range_deletions++;
|
|
} else if (value_type == kTypeMerge) {
|
|
r->props.num_merge_operands++;
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::Flush() {
|
|
Rep* r = rep_;
|
|
assert(rep_->state != Rep::State::kClosed);
|
|
if (!ok()) return;
|
|
if (r->data_block.empty()) return;
|
|
if (r->compression_opts.parallel_threads > 1 &&
|
|
r->state == Rep::State::kUnbuffered) {
|
|
ParallelCompressionRep::BlockRep* block_rep = nullptr;
|
|
r->pc_rep->block_rep_pool.pop(block_rep);
|
|
assert(block_rep != nullptr);
|
|
|
|
r->data_block.Finish();
|
|
assert(block_rep->data);
|
|
r->data_block.SwapAndReset(*(block_rep->data));
|
|
|
|
block_rep->contents = *(block_rep->data);
|
|
|
|
block_rep->compression_type = r->compression_type;
|
|
|
|
std::swap(block_rep->keys, r->pc_rep->curr_block_keys);
|
|
r->pc_rep->curr_block_keys->Clear();
|
|
|
|
if (r->first_key_in_next_block == nullptr) {
|
|
block_rep->first_key_in_next_block.reset(nullptr);
|
|
} else {
|
|
block_rep->first_key_in_next_block->assign(
|
|
r->first_key_in_next_block->data(),
|
|
r->first_key_in_next_block->size());
|
|
}
|
|
|
|
uint64_t new_raw_bytes_inflight =
|
|
r->pc_rep->raw_bytes_inflight.fetch_add(block_rep->data->size(),
|
|
std::memory_order_relaxed) +
|
|
block_rep->data->size();
|
|
uint64_t new_blocks_inflight =
|
|
r->pc_rep->blocks_inflight.fetch_add(1, std::memory_order_relaxed) + 1;
|
|
r->pc_rep->estimated_file_size.store(
|
|
r->get_offset() +
|
|
static_cast<uint64_t>(static_cast<double>(new_raw_bytes_inflight) *
|
|
r->pc_rep->curr_compression_ratio.load(
|
|
std::memory_order_relaxed)) +
|
|
new_blocks_inflight * kBlockTrailerSize,
|
|
std::memory_order_relaxed);
|
|
|
|
// Read out first_block here to avoid data race with BGWorkWriteRawBlock
|
|
bool first_block = r->pc_rep->first_block;
|
|
|
|
assert(block_rep->status.ok());
|
|
if (!r->pc_rep->write_queue.push(block_rep->slot.get())) {
|
|
return;
|
|
}
|
|
if (!r->pc_rep->compress_queue.push(block_rep)) {
|
|
return;
|
|
}
|
|
|
|
if (first_block) {
|
|
std::unique_lock<std::mutex> lock(r->pc_rep->first_block_mutex);
|
|
r->pc_rep->first_block_cond.wait(lock,
|
|
[r] { return !r->pc_rep->first_block; });
|
|
}
|
|
} else {
|
|
WriteBlock(&r->data_block, &r->pending_handle, true /* is_data_block */);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteBlock(BlockBuilder* block,
|
|
BlockHandle* handle,
|
|
bool is_data_block) {
|
|
WriteBlock(block->Finish(), handle, is_data_block);
|
|
block->Reset();
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteBlock(const Slice& raw_block_contents,
|
|
BlockHandle* handle,
|
|
bool is_data_block) {
|
|
Rep* r = rep_;
|
|
Slice block_contents;
|
|
CompressionType type;
|
|
if (r->state == Rep::State::kBuffered) {
|
|
assert(is_data_block);
|
|
assert(!r->data_block_and_keys_buffers.empty());
|
|
r->data_block_and_keys_buffers.back().first = raw_block_contents.ToString();
|
|
r->data_begin_offset += r->data_block_and_keys_buffers.back().first.size();
|
|
return;
|
|
}
|
|
CompressAndVerifyBlock(raw_block_contents, is_data_block,
|
|
*(r->compression_ctxs[0]), r->verify_ctxs[0].get(),
|
|
r->compressed_output, block_contents, type, r->status);
|
|
if (!ok()) {
|
|
return;
|
|
}
|
|
WriteRawBlock(block_contents, type, handle, is_data_block);
|
|
r->compressed_output.clear();
|
|
if (is_data_block) {
|
|
if (r->filter_builder != nullptr) {
|
|
r->filter_builder->StartBlock(r->get_offset());
|
|
}
|
|
r->props.data_size = r->get_offset();
|
|
++r->props.num_data_blocks;
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::BGWorkCompression(
|
|
CompressionContext& compression_ctx, UncompressionContext* verify_ctx) {
|
|
ParallelCompressionRep::BlockRep* block_rep;
|
|
while (rep_->pc_rep->compress_queue.pop(block_rep)) {
|
|
CompressAndVerifyBlock(block_rep->contents, true, /* is_data_block*/
|
|
compression_ctx, verify_ctx,
|
|
*(block_rep->compressed_data), block_rep->contents,
|
|
block_rep->compression_type, block_rep->status);
|
|
block_rep->slot->Fill(block_rep);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::CompressAndVerifyBlock(
|
|
const Slice& raw_block_contents, bool is_data_block,
|
|
CompressionContext& compression_ctx, UncompressionContext* verify_ctx_ptr,
|
|
std::string& compressed_output, Slice& block_contents,
|
|
CompressionType& type, Status& out_status) {
|
|
// File format contains a sequence of blocks where each block has:
|
|
// block_data: uint8[n]
|
|
// type: uint8
|
|
// crc: uint32
|
|
assert(ok());
|
|
Rep* r = rep_;
|
|
|
|
type = r->compression_type;
|
|
uint64_t sample_for_compression = r->sample_for_compression;
|
|
bool abort_compression = false;
|
|
|
|
StopWatchNano timer(
|
|
r->ioptions.env,
|
|
ShouldReportDetailedTime(r->ioptions.env, r->ioptions.statistics));
|
|
|
|
if (raw_block_contents.size() < kCompressionSizeLimit) {
|
|
const CompressionDict* compression_dict;
|
|
if (!is_data_block || r->compression_dict == nullptr) {
|
|
compression_dict = &CompressionDict::GetEmptyDict();
|
|
} else {
|
|
compression_dict = r->compression_dict.get();
|
|
}
|
|
assert(compression_dict != nullptr);
|
|
CompressionInfo compression_info(r->compression_opts, compression_ctx,
|
|
*compression_dict, type,
|
|
sample_for_compression);
|
|
|
|
std::string sampled_output_fast;
|
|
std::string sampled_output_slow;
|
|
block_contents = CompressBlock(
|
|
raw_block_contents, compression_info, &type,
|
|
r->table_options.format_version, is_data_block /* do_sample */,
|
|
&compressed_output, &sampled_output_fast, &sampled_output_slow);
|
|
|
|
// notify collectors on block add
|
|
NotifyCollectTableCollectorsOnBlockAdd(
|
|
r->table_properties_collectors, raw_block_contents.size(),
|
|
sampled_output_fast.size(), sampled_output_slow.size());
|
|
|
|
// Some of the compression algorithms are known to be unreliable. If
|
|
// the verify_compression flag is set then try to de-compress the
|
|
// compressed data and compare to the input.
|
|
if (type != kNoCompression && r->table_options.verify_compression) {
|
|
// Retrieve the uncompressed contents into a new buffer
|
|
const UncompressionDict* verify_dict;
|
|
if (!is_data_block || r->verify_dict == nullptr) {
|
|
verify_dict = &UncompressionDict::GetEmptyDict();
|
|
} else {
|
|
verify_dict = r->verify_dict.get();
|
|
}
|
|
assert(verify_dict != nullptr);
|
|
BlockContents contents;
|
|
UncompressionInfo uncompression_info(*verify_ctx_ptr, *verify_dict,
|
|
r->compression_type);
|
|
Status stat = UncompressBlockContentsForCompressionType(
|
|
uncompression_info, block_contents.data(), block_contents.size(),
|
|
&contents, r->table_options.format_version, r->ioptions);
|
|
|
|
if (stat.ok()) {
|
|
bool compressed_ok = contents.data.compare(raw_block_contents) == 0;
|
|
if (!compressed_ok) {
|
|
// The result of the compression was invalid. abort.
|
|
abort_compression = true;
|
|
ROCKS_LOG_ERROR(r->ioptions.info_log,
|
|
"Decompressed block did not match raw block");
|
|
out_status =
|
|
Status::Corruption("Decompressed block did not match raw block");
|
|
}
|
|
} else {
|
|
// Decompression reported an error. abort.
|
|
out_status = Status::Corruption("Could not decompress");
|
|
abort_compression = true;
|
|
}
|
|
}
|
|
} else {
|
|
// Block is too big to be compressed.
|
|
abort_compression = true;
|
|
}
|
|
|
|
// Abort compression if the block is too big, or did not pass
|
|
// verification.
|
|
if (abort_compression) {
|
|
RecordTick(r->ioptions.statistics, NUMBER_BLOCK_NOT_COMPRESSED);
|
|
type = kNoCompression;
|
|
block_contents = raw_block_contents;
|
|
} else if (type != kNoCompression) {
|
|
if (ShouldReportDetailedTime(r->ioptions.env, r->ioptions.statistics)) {
|
|
RecordTimeToHistogram(r->ioptions.statistics, COMPRESSION_TIMES_NANOS,
|
|
timer.ElapsedNanos());
|
|
}
|
|
RecordInHistogram(r->ioptions.statistics, BYTES_COMPRESSED,
|
|
raw_block_contents.size());
|
|
RecordTick(r->ioptions.statistics, NUMBER_BLOCK_COMPRESSED);
|
|
} else if (type != r->compression_type) {
|
|
RecordTick(r->ioptions.statistics, NUMBER_BLOCK_NOT_COMPRESSED);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteRawBlock(const Slice& block_contents,
|
|
CompressionType type,
|
|
BlockHandle* handle,
|
|
bool is_data_block) {
|
|
Rep* r = rep_;
|
|
Status s = Status::OK();
|
|
IOStatus io_s = IOStatus::OK();
|
|
StopWatch sw(r->ioptions.env, r->ioptions.statistics, WRITE_RAW_BLOCK_MICROS);
|
|
handle->set_offset(r->get_offset());
|
|
handle->set_size(block_contents.size());
|
|
assert(status().ok());
|
|
assert(io_status().ok());
|
|
io_s = r->file->Append(block_contents);
|
|
if (io_s.ok()) {
|
|
char trailer[kBlockTrailerSize];
|
|
trailer[0] = type;
|
|
char* trailer_without_type = trailer + 1;
|
|
switch (r->table_options.checksum) {
|
|
case kNoChecksum:
|
|
EncodeFixed32(trailer_without_type, 0);
|
|
break;
|
|
case kCRC32c: {
|
|
auto crc = crc32c::Value(block_contents.data(), block_contents.size());
|
|
crc = crc32c::Extend(crc, trailer, 1); // Extend to cover block type
|
|
EncodeFixed32(trailer_without_type, crc32c::Mask(crc));
|
|
break;
|
|
}
|
|
case kxxHash: {
|
|
XXH32_state_t* const state = XXH32_createState();
|
|
XXH32_reset(state, 0);
|
|
XXH32_update(state, block_contents.data(),
|
|
static_cast<uint32_t>(block_contents.size()));
|
|
XXH32_update(state, trailer, 1); // Extend to cover block type
|
|
EncodeFixed32(trailer_without_type, XXH32_digest(state));
|
|
XXH32_freeState(state);
|
|
break;
|
|
}
|
|
case kxxHash64: {
|
|
XXH64_state_t* const state = XXH64_createState();
|
|
XXH64_reset(state, 0);
|
|
XXH64_update(state, block_contents.data(),
|
|
static_cast<uint32_t>(block_contents.size()));
|
|
XXH64_update(state, trailer, 1); // Extend to cover block type
|
|
EncodeFixed32(
|
|
trailer_without_type,
|
|
static_cast<uint32_t>(XXH64_digest(state) & // lower 32 bits
|
|
uint64_t{0xffffffff}));
|
|
XXH64_freeState(state);
|
|
break;
|
|
}
|
|
}
|
|
|
|
assert(io_s.ok());
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"BlockBasedTableBuilder::WriteRawBlock:TamperWithChecksum",
|
|
static_cast<char*>(trailer));
|
|
io_s = r->file->Append(Slice(trailer, kBlockTrailerSize));
|
|
if (io_s.ok()) {
|
|
s = InsertBlockInCache(block_contents, type, handle);
|
|
if (!s.ok()) {
|
|
SetStatusAtom(s);
|
|
}
|
|
} else {
|
|
SetIOStatusAtom(io_s);
|
|
}
|
|
if (s.ok() && io_s.ok()) {
|
|
r->set_offset(r->get_offset() + block_contents.size() +
|
|
kBlockTrailerSize);
|
|
if (r->table_options.block_align && is_data_block) {
|
|
size_t pad_bytes =
|
|
(r->alignment - ((block_contents.size() + kBlockTrailerSize) &
|
|
(r->alignment - 1))) &
|
|
(r->alignment - 1);
|
|
io_s = r->file->Pad(pad_bytes);
|
|
if (io_s.ok()) {
|
|
r->set_offset(r->get_offset() + pad_bytes);
|
|
} else {
|
|
SetIOStatusAtom(io_s);
|
|
}
|
|
}
|
|
if (r->compression_opts.parallel_threads > 1) {
|
|
if (!r->pc_rep->finished) {
|
|
assert(r->pc_rep->raw_bytes_compressed +
|
|
r->pc_rep->raw_bytes_curr_block >
|
|
0);
|
|
r->pc_rep->curr_compression_ratio.store(
|
|
(r->pc_rep->curr_compression_ratio.load(
|
|
std::memory_order_relaxed) *
|
|
r->pc_rep->raw_bytes_compressed +
|
|
block_contents.size()) /
|
|
static_cast<double>(r->pc_rep->raw_bytes_compressed +
|
|
r->pc_rep->raw_bytes_curr_block),
|
|
std::memory_order_relaxed);
|
|
r->pc_rep->raw_bytes_compressed += r->pc_rep->raw_bytes_curr_block;
|
|
uint64_t new_raw_bytes_inflight =
|
|
r->pc_rep->raw_bytes_inflight.fetch_sub(
|
|
r->pc_rep->raw_bytes_curr_block, std::memory_order_relaxed) -
|
|
r->pc_rep->raw_bytes_curr_block;
|
|
uint64_t new_blocks_inflight = r->pc_rep->blocks_inflight.fetch_sub(
|
|
1, std::memory_order_relaxed) -
|
|
1;
|
|
r->pc_rep->estimated_file_size.store(
|
|
r->get_offset() +
|
|
static_cast<uint64_t>(
|
|
static_cast<double>(new_raw_bytes_inflight) *
|
|
r->pc_rep->curr_compression_ratio.load(
|
|
std::memory_order_relaxed)) +
|
|
new_blocks_inflight * kBlockTrailerSize,
|
|
std::memory_order_relaxed);
|
|
} else {
|
|
r->pc_rep->estimated_file_size.store(r->get_offset(),
|
|
std::memory_order_relaxed);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
SetIOStatusAtom(io_s);
|
|
}
|
|
if (!io_s.ok() && s.ok()) {
|
|
SetStatusAtom(io_s);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::BGWorkWriteRawBlock() {
|
|
Rep* r = rep_;
|
|
ParallelCompressionRep::BlockRepSlot* slot;
|
|
ParallelCompressionRep::BlockRep* block_rep;
|
|
while (r->pc_rep->write_queue.pop(slot)) {
|
|
slot->Take(block_rep);
|
|
if (!block_rep->status.ok()) {
|
|
SetStatusAtom(block_rep->status);
|
|
break;
|
|
}
|
|
|
|
for (size_t i = 0; i < block_rep->keys->Size(); i++) {
|
|
auto& key = (*block_rep->keys)[i];
|
|
if (r->filter_builder != nullptr) {
|
|
size_t ts_sz =
|
|
r->internal_comparator.user_comparator()->timestamp_size();
|
|
r->filter_builder->Add(ExtractUserKeyAndStripTimestamp(key, ts_sz));
|
|
}
|
|
r->index_builder->OnKeyAdded(key);
|
|
}
|
|
|
|
r->pc_rep->raw_bytes_curr_block = block_rep->data->size();
|
|
WriteRawBlock(block_rep->contents, block_rep->compression_type,
|
|
&r->pending_handle, true /* is_data_block*/);
|
|
if (!r->status.ok()) {
|
|
break;
|
|
}
|
|
|
|
if (r->pc_rep->first_block) {
|
|
std::lock_guard<std::mutex> lock(r->pc_rep->first_block_mutex);
|
|
r->pc_rep->first_block = false;
|
|
r->pc_rep->first_block_cond.notify_one();
|
|
}
|
|
|
|
if (r->filter_builder != nullptr) {
|
|
r->filter_builder->StartBlock(r->get_offset());
|
|
}
|
|
r->props.data_size = r->get_offset();
|
|
++r->props.num_data_blocks;
|
|
|
|
if (block_rep->first_key_in_next_block == nullptr) {
|
|
r->index_builder->AddIndexEntry(&(block_rep->keys->Back()), nullptr,
|
|
r->pending_handle);
|
|
} else {
|
|
Slice first_key_in_next_block =
|
|
Slice(*block_rep->first_key_in_next_block);
|
|
r->index_builder->AddIndexEntry(&(block_rep->keys->Back()),
|
|
&first_key_in_next_block,
|
|
r->pending_handle);
|
|
}
|
|
block_rep->compressed_data->clear();
|
|
r->pc_rep->block_rep_pool.push(block_rep);
|
|
}
|
|
}
|
|
|
|
Status BlockBasedTableBuilder::status() const {
|
|
if (rep_->compression_opts.parallel_threads > 1) {
|
|
std::lock_guard<std::mutex> lock(rep_->status_mutex);
|
|
return rep_->status;
|
|
} else {
|
|
return rep_->status;
|
|
}
|
|
}
|
|
|
|
IOStatus BlockBasedTableBuilder::io_status() const {
|
|
if (rep_->compression_opts.parallel_threads > 1) {
|
|
std::lock_guard<std::mutex> lock(rep_->io_status_mutex);
|
|
return rep_->io_status;
|
|
} else {
|
|
return rep_->io_status;
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::SetStatusAtom(Status s) {
|
|
if (rep_->compression_opts.parallel_threads > 1) {
|
|
std::lock_guard<std::mutex> lock(rep_->status_mutex);
|
|
rep_->status = s;
|
|
} else {
|
|
rep_->status = s;
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::SetIOStatusAtom(IOStatus io_s) {
|
|
if (rep_->compression_opts.parallel_threads > 1) {
|
|
std::lock_guard<std::mutex> lock(rep_->io_status_mutex);
|
|
rep_->io_status = io_s;
|
|
} else {
|
|
rep_->io_status = io_s;
|
|
}
|
|
}
|
|
|
|
static void DeleteCachedBlockContents(const Slice& /*key*/, void* value) {
|
|
BlockContents* bc = reinterpret_cast<BlockContents*>(value);
|
|
delete bc;
|
|
}
|
|
|
|
//
|
|
// Make a copy of the block contents and insert into compressed block cache
|
|
//
|
|
Status BlockBasedTableBuilder::InsertBlockInCache(const Slice& block_contents,
|
|
const CompressionType type,
|
|
const BlockHandle* handle) {
|
|
Rep* r = rep_;
|
|
Cache* block_cache_compressed = r->table_options.block_cache_compressed.get();
|
|
|
|
if (type != kNoCompression && block_cache_compressed != nullptr) {
|
|
size_t size = block_contents.size();
|
|
|
|
auto ubuf =
|
|
AllocateBlock(size + 1, block_cache_compressed->memory_allocator());
|
|
memcpy(ubuf.get(), block_contents.data(), size);
|
|
ubuf[size] = type;
|
|
|
|
BlockContents* block_contents_to_cache =
|
|
new BlockContents(std::move(ubuf), size);
|
|
#ifndef NDEBUG
|
|
block_contents_to_cache->is_raw_block = true;
|
|
#endif // NDEBUG
|
|
|
|
// make cache key by appending the file offset to the cache prefix id
|
|
char* end = EncodeVarint64(
|
|
r->compressed_cache_key_prefix + r->compressed_cache_key_prefix_size,
|
|
handle->offset());
|
|
Slice key(r->compressed_cache_key_prefix,
|
|
static_cast<size_t>(end - r->compressed_cache_key_prefix));
|
|
|
|
// Insert into compressed block cache.
|
|
block_cache_compressed->Insert(
|
|
key, block_contents_to_cache,
|
|
block_contents_to_cache->ApproximateMemoryUsage(),
|
|
&DeleteCachedBlockContents);
|
|
|
|
// Invalidate OS cache.
|
|
r->file->InvalidateCache(static_cast<size_t>(r->get_offset()), size);
|
|
}
|
|
return Status::OK();
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteFilterBlock(
|
|
MetaIndexBuilder* meta_index_builder) {
|
|
BlockHandle filter_block_handle;
|
|
bool empty_filter_block = (rep_->filter_builder == nullptr ||
|
|
rep_->filter_builder->NumAdded() == 0);
|
|
if (ok() && !empty_filter_block) {
|
|
Status s = Status::Incomplete();
|
|
while (ok() && s.IsIncomplete()) {
|
|
Slice filter_content =
|
|
rep_->filter_builder->Finish(filter_block_handle, &s);
|
|
assert(s.ok() || s.IsIncomplete());
|
|
rep_->props.filter_size += filter_content.size();
|
|
WriteRawBlock(filter_content, kNoCompression, &filter_block_handle);
|
|
}
|
|
}
|
|
if (ok() && !empty_filter_block) {
|
|
// Add mapping from "<filter_block_prefix>.Name" to location
|
|
// of filter data.
|
|
std::string key;
|
|
if (rep_->filter_builder->IsBlockBased()) {
|
|
key = BlockBasedTable::kFilterBlockPrefix;
|
|
} else {
|
|
key = rep_->table_options.partition_filters
|
|
? BlockBasedTable::kPartitionedFilterBlockPrefix
|
|
: BlockBasedTable::kFullFilterBlockPrefix;
|
|
}
|
|
key.append(rep_->table_options.filter_policy->Name());
|
|
meta_index_builder->Add(key, filter_block_handle);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteIndexBlock(
|
|
MetaIndexBuilder* meta_index_builder, BlockHandle* index_block_handle) {
|
|
IndexBuilder::IndexBlocks index_blocks;
|
|
auto index_builder_status = rep_->index_builder->Finish(&index_blocks);
|
|
if (index_builder_status.IsIncomplete()) {
|
|
// We we have more than one index partition then meta_blocks are not
|
|
// supported for the index. Currently meta_blocks are used only by
|
|
// HashIndexBuilder which is not multi-partition.
|
|
assert(index_blocks.meta_blocks.empty());
|
|
} else if (ok() && !index_builder_status.ok()) {
|
|
rep_->status = index_builder_status;
|
|
}
|
|
if (ok()) {
|
|
for (const auto& item : index_blocks.meta_blocks) {
|
|
BlockHandle block_handle;
|
|
WriteBlock(item.second, &block_handle, false /* is_data_block */);
|
|
if (!ok()) {
|
|
break;
|
|
}
|
|
meta_index_builder->Add(item.first, block_handle);
|
|
}
|
|
}
|
|
if (ok()) {
|
|
if (rep_->table_options.enable_index_compression) {
|
|
WriteBlock(index_blocks.index_block_contents, index_block_handle, false);
|
|
} else {
|
|
WriteRawBlock(index_blocks.index_block_contents, kNoCompression,
|
|
index_block_handle);
|
|
}
|
|
}
|
|
// If there are more index partitions, finish them and write them out
|
|
Status s = index_builder_status;
|
|
while (ok() && s.IsIncomplete()) {
|
|
s = rep_->index_builder->Finish(&index_blocks, *index_block_handle);
|
|
if (!s.ok() && !s.IsIncomplete()) {
|
|
rep_->status = s;
|
|
return;
|
|
}
|
|
if (rep_->table_options.enable_index_compression) {
|
|
WriteBlock(index_blocks.index_block_contents, index_block_handle, false);
|
|
} else {
|
|
WriteRawBlock(index_blocks.index_block_contents, kNoCompression,
|
|
index_block_handle);
|
|
}
|
|
// The last index_block_handle will be for the partition index block
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WritePropertiesBlock(
|
|
MetaIndexBuilder* meta_index_builder) {
|
|
BlockHandle properties_block_handle;
|
|
if (ok()) {
|
|
PropertyBlockBuilder property_block_builder;
|
|
rep_->props.column_family_id = rep_->column_family_id;
|
|
rep_->props.column_family_name = rep_->column_family_name;
|
|
rep_->props.filter_policy_name =
|
|
rep_->table_options.filter_policy != nullptr
|
|
? rep_->table_options.filter_policy->Name()
|
|
: "";
|
|
rep_->props.index_size =
|
|
rep_->index_builder->IndexSize() + kBlockTrailerSize;
|
|
rep_->props.comparator_name = rep_->ioptions.user_comparator != nullptr
|
|
? rep_->ioptions.user_comparator->Name()
|
|
: "nullptr";
|
|
rep_->props.merge_operator_name =
|
|
rep_->ioptions.merge_operator != nullptr
|
|
? rep_->ioptions.merge_operator->Name()
|
|
: "nullptr";
|
|
rep_->props.compression_name =
|
|
CompressionTypeToString(rep_->compression_type);
|
|
rep_->props.compression_options =
|
|
CompressionOptionsToString(rep_->compression_opts);
|
|
rep_->props.prefix_extractor_name =
|
|
rep_->moptions.prefix_extractor != nullptr
|
|
? rep_->moptions.prefix_extractor->Name()
|
|
: "nullptr";
|
|
|
|
std::string property_collectors_names = "[";
|
|
for (size_t i = 0;
|
|
i < rep_->ioptions.table_properties_collector_factories.size(); ++i) {
|
|
if (i != 0) {
|
|
property_collectors_names += ",";
|
|
}
|
|
property_collectors_names +=
|
|
rep_->ioptions.table_properties_collector_factories[i]->Name();
|
|
}
|
|
property_collectors_names += "]";
|
|
rep_->props.property_collectors_names = property_collectors_names;
|
|
if (rep_->table_options.index_type ==
|
|
BlockBasedTableOptions::kTwoLevelIndexSearch) {
|
|
assert(rep_->p_index_builder_ != nullptr);
|
|
rep_->props.index_partitions = rep_->p_index_builder_->NumPartitions();
|
|
rep_->props.top_level_index_size =
|
|
rep_->p_index_builder_->TopLevelIndexSize(rep_->offset);
|
|
}
|
|
rep_->props.index_key_is_user_key =
|
|
!rep_->index_builder->seperator_is_key_plus_seq();
|
|
rep_->props.index_value_is_delta_encoded =
|
|
rep_->use_delta_encoding_for_index_values;
|
|
rep_->props.creation_time = rep_->creation_time;
|
|
rep_->props.oldest_key_time = rep_->oldest_key_time;
|
|
rep_->props.file_creation_time = rep_->file_creation_time;
|
|
|
|
// Add basic properties
|
|
property_block_builder.AddTableProperty(rep_->props);
|
|
|
|
// Add use collected properties
|
|
NotifyCollectTableCollectorsOnFinish(rep_->table_properties_collectors,
|
|
rep_->ioptions.info_log,
|
|
&property_block_builder);
|
|
|
|
WriteRawBlock(property_block_builder.Finish(), kNoCompression,
|
|
&properties_block_handle);
|
|
}
|
|
if (ok()) {
|
|
#ifndef NDEBUG
|
|
{
|
|
uint64_t props_block_offset = properties_block_handle.offset();
|
|
uint64_t props_block_size = properties_block_handle.size();
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"BlockBasedTableBuilder::WritePropertiesBlock:GetPropsBlockOffset",
|
|
&props_block_offset);
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"BlockBasedTableBuilder::WritePropertiesBlock:GetPropsBlockSize",
|
|
&props_block_size);
|
|
}
|
|
#endif // !NDEBUG
|
|
meta_index_builder->Add(kPropertiesBlock, properties_block_handle);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteCompressionDictBlock(
|
|
MetaIndexBuilder* meta_index_builder) {
|
|
if (rep_->compression_dict != nullptr &&
|
|
rep_->compression_dict->GetRawDict().size()) {
|
|
BlockHandle compression_dict_block_handle;
|
|
if (ok()) {
|
|
WriteRawBlock(rep_->compression_dict->GetRawDict(), kNoCompression,
|
|
&compression_dict_block_handle);
|
|
#ifndef NDEBUG
|
|
Slice compression_dict = rep_->compression_dict->GetRawDict();
|
|
TEST_SYNC_POINT_CALLBACK(
|
|
"BlockBasedTableBuilder::WriteCompressionDictBlock:RawDict",
|
|
&compression_dict);
|
|
#endif // NDEBUG
|
|
}
|
|
if (ok()) {
|
|
meta_index_builder->Add(kCompressionDictBlock,
|
|
compression_dict_block_handle);
|
|
}
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteRangeDelBlock(
|
|
MetaIndexBuilder* meta_index_builder) {
|
|
if (ok() && !rep_->range_del_block.empty()) {
|
|
BlockHandle range_del_block_handle;
|
|
WriteRawBlock(rep_->range_del_block.Finish(), kNoCompression,
|
|
&range_del_block_handle);
|
|
meta_index_builder->Add(kRangeDelBlock, range_del_block_handle);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteFooter(BlockHandle& metaindex_block_handle,
|
|
BlockHandle& index_block_handle) {
|
|
Rep* r = rep_;
|
|
// No need to write out new footer if we're using default checksum.
|
|
// We're writing legacy magic number because we want old versions of RocksDB
|
|
// be able to read files generated with new release (just in case if
|
|
// somebody wants to roll back after an upgrade)
|
|
// TODO(icanadi) at some point in the future, when we're absolutely sure
|
|
// nobody will roll back to RocksDB 2.x versions, retire the legacy magic
|
|
// number and always write new table files with new magic number
|
|
bool legacy = (r->table_options.format_version == 0);
|
|
// this is guaranteed by BlockBasedTableBuilder's constructor
|
|
assert(r->table_options.checksum == kCRC32c ||
|
|
r->table_options.format_version != 0);
|
|
Footer footer(
|
|
legacy ? kLegacyBlockBasedTableMagicNumber : kBlockBasedTableMagicNumber,
|
|
r->table_options.format_version);
|
|
footer.set_metaindex_handle(metaindex_block_handle);
|
|
footer.set_index_handle(index_block_handle);
|
|
footer.set_checksum(r->table_options.checksum);
|
|
std::string footer_encoding;
|
|
footer.EncodeTo(&footer_encoding);
|
|
assert(r->status.ok());
|
|
assert(r->io_status.ok());
|
|
r->io_status = r->file->Append(footer_encoding);
|
|
if (r->io_status.ok()) {
|
|
r->set_offset(r->get_offset() + footer_encoding.size());
|
|
}
|
|
r->status = r->io_status;
|
|
}
|
|
|
|
void BlockBasedTableBuilder::EnterUnbuffered() {
|
|
Rep* r = rep_;
|
|
assert(r->state == Rep::State::kBuffered);
|
|
r->state = Rep::State::kUnbuffered;
|
|
const size_t kSampleBytes = r->compression_opts.zstd_max_train_bytes > 0
|
|
? r->compression_opts.zstd_max_train_bytes
|
|
: r->compression_opts.max_dict_bytes;
|
|
Random64 generator{r->creation_time};
|
|
std::string compression_dict_samples;
|
|
std::vector<size_t> compression_dict_sample_lens;
|
|
if (!r->data_block_and_keys_buffers.empty()) {
|
|
while (compression_dict_samples.size() < kSampleBytes) {
|
|
size_t rand_idx =
|
|
static_cast<size_t>(
|
|
generator.Uniform(r->data_block_and_keys_buffers.size()));
|
|
size_t copy_len =
|
|
std::min(kSampleBytes - compression_dict_samples.size(),
|
|
r->data_block_and_keys_buffers[rand_idx].first.size());
|
|
compression_dict_samples.append(
|
|
r->data_block_and_keys_buffers[rand_idx].first, 0, copy_len);
|
|
compression_dict_sample_lens.emplace_back(copy_len);
|
|
}
|
|
}
|
|
|
|
// final data block flushed, now we can generate dictionary from the samples.
|
|
// OK if compression_dict_samples is empty, we'll just get empty dictionary.
|
|
std::string dict;
|
|
if (r->compression_opts.zstd_max_train_bytes > 0) {
|
|
dict = ZSTD_TrainDictionary(compression_dict_samples,
|
|
compression_dict_sample_lens,
|
|
r->compression_opts.max_dict_bytes);
|
|
} else {
|
|
dict = std::move(compression_dict_samples);
|
|
}
|
|
r->compression_dict.reset(new CompressionDict(dict, r->compression_type,
|
|
r->compression_opts.level));
|
|
r->verify_dict.reset(new UncompressionDict(
|
|
dict, r->compression_type == kZSTD ||
|
|
r->compression_type == kZSTDNotFinalCompression));
|
|
|
|
for (size_t i = 0; ok() && i < r->data_block_and_keys_buffers.size(); ++i) {
|
|
auto& data_block = r->data_block_and_keys_buffers[i].first;
|
|
auto& keys = r->data_block_and_keys_buffers[i].second;
|
|
assert(!data_block.empty());
|
|
assert(!keys.empty());
|
|
|
|
if (r->compression_opts.parallel_threads > 1) {
|
|
ParallelCompressionRep::BlockRep* block_rep;
|
|
r->pc_rep->block_rep_pool.pop(block_rep);
|
|
|
|
std::swap(*(block_rep->data), data_block);
|
|
block_rep->contents = *(block_rep->data);
|
|
|
|
block_rep->compression_type = r->compression_type;
|
|
|
|
block_rep->keys->SwapAssign(keys);
|
|
|
|
if (i + 1 < r->data_block_and_keys_buffers.size()) {
|
|
block_rep->first_key_in_next_block->assign(
|
|
r->data_block_and_keys_buffers[i + 1].second.front());
|
|
} else {
|
|
block_rep->first_key_in_next_block.reset(nullptr);
|
|
}
|
|
|
|
assert(block_rep->status.ok());
|
|
if (!r->pc_rep->write_queue.push(block_rep->slot.get())) {
|
|
return;
|
|
}
|
|
if (!r->pc_rep->compress_queue.push(block_rep)) {
|
|
return;
|
|
}
|
|
} else {
|
|
for (const auto& key : keys) {
|
|
if (r->filter_builder != nullptr) {
|
|
size_t ts_sz =
|
|
r->internal_comparator.user_comparator()->timestamp_size();
|
|
r->filter_builder->Add(ExtractUserKeyAndStripTimestamp(key, ts_sz));
|
|
}
|
|
r->index_builder->OnKeyAdded(key);
|
|
}
|
|
WriteBlock(Slice(data_block), &r->pending_handle,
|
|
true /* is_data_block */);
|
|
if (ok() && i + 1 < r->data_block_and_keys_buffers.size()) {
|
|
Slice first_key_in_next_block =
|
|
r->data_block_and_keys_buffers[i + 1].second.front();
|
|
Slice* first_key_in_next_block_ptr = &first_key_in_next_block;
|
|
r->index_builder->AddIndexEntry(
|
|
&keys.back(), first_key_in_next_block_ptr, r->pending_handle);
|
|
}
|
|
}
|
|
}
|
|
r->data_block_and_keys_buffers.clear();
|
|
}
|
|
|
|
Status BlockBasedTableBuilder::Finish() {
|
|
Rep* r = rep_;
|
|
assert(r->state != Rep::State::kClosed);
|
|
bool empty_data_block = r->data_block.empty();
|
|
r->first_key_in_next_block = nullptr;
|
|
Flush();
|
|
if (r->state == Rep::State::kBuffered) {
|
|
EnterUnbuffered();
|
|
}
|
|
if (r->compression_opts.parallel_threads > 1) {
|
|
r->pc_rep->compress_queue.finish();
|
|
for (auto& thread : r->pc_rep->compress_thread_pool) {
|
|
thread.join();
|
|
}
|
|
r->pc_rep->write_queue.finish();
|
|
r->pc_rep->write_thread->join();
|
|
r->pc_rep->finished = true;
|
|
} else {
|
|
// To make sure properties block is able to keep the accurate size of index
|
|
// block, we will finish writing all index entries first.
|
|
if (ok() && !empty_data_block) {
|
|
r->index_builder->AddIndexEntry(
|
|
&r->last_key, nullptr /* no next data block */, r->pending_handle);
|
|
}
|
|
}
|
|
|
|
// Write meta blocks, metaindex block and footer in the following order.
|
|
// 1. [meta block: filter]
|
|
// 2. [meta block: index]
|
|
// 3. [meta block: compression dictionary]
|
|
// 4. [meta block: range deletion tombstone]
|
|
// 5. [meta block: properties]
|
|
// 6. [metaindex block]
|
|
// 7. Footer
|
|
BlockHandle metaindex_block_handle, index_block_handle;
|
|
MetaIndexBuilder meta_index_builder;
|
|
WriteFilterBlock(&meta_index_builder);
|
|
WriteIndexBlock(&meta_index_builder, &index_block_handle);
|
|
WriteCompressionDictBlock(&meta_index_builder);
|
|
WriteRangeDelBlock(&meta_index_builder);
|
|
WritePropertiesBlock(&meta_index_builder);
|
|
if (ok()) {
|
|
// flush the meta index block
|
|
WriteRawBlock(meta_index_builder.Finish(), kNoCompression,
|
|
&metaindex_block_handle);
|
|
}
|
|
if (ok()) {
|
|
WriteFooter(metaindex_block_handle, index_block_handle);
|
|
}
|
|
r->state = Rep::State::kClosed;
|
|
return r->status;
|
|
}
|
|
|
|
void BlockBasedTableBuilder::Abandon() {
|
|
assert(rep_->state != Rep::State::kClosed);
|
|
if (rep_->compression_opts.parallel_threads > 1) {
|
|
rep_->pc_rep->compress_queue.finish();
|
|
for (auto& thread : rep_->pc_rep->compress_thread_pool) {
|
|
thread.join();
|
|
}
|
|
rep_->pc_rep->write_queue.finish();
|
|
rep_->pc_rep->write_thread->join();
|
|
rep_->pc_rep->finished = true;
|
|
}
|
|
rep_->state = Rep::State::kClosed;
|
|
}
|
|
|
|
uint64_t BlockBasedTableBuilder::NumEntries() const {
|
|
return rep_->props.num_entries;
|
|
}
|
|
|
|
bool BlockBasedTableBuilder::IsEmpty() const {
|
|
return rep_->props.num_entries == 0 && rep_->props.num_range_deletions == 0;
|
|
}
|
|
|
|
uint64_t BlockBasedTableBuilder::FileSize() const { return rep_->offset; }
|
|
|
|
uint64_t BlockBasedTableBuilder::EstimatedFileSize() const {
|
|
if (rep_->compression_opts.parallel_threads > 1) {
|
|
// Use compression ratio so far and inflight raw bytes to estimate
|
|
// final SST size.
|
|
return rep_->pc_rep->estimated_file_size.load(std::memory_order_relaxed);
|
|
} else {
|
|
return FileSize();
|
|
}
|
|
}
|
|
|
|
bool BlockBasedTableBuilder::NeedCompact() const {
|
|
for (const auto& collector : rep_->table_properties_collectors) {
|
|
if (collector->NeedCompact()) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
TableProperties BlockBasedTableBuilder::GetTableProperties() const {
|
|
TableProperties ret = rep_->props;
|
|
for (const auto& collector : rep_->table_properties_collectors) {
|
|
for (const auto& prop : collector->GetReadableProperties()) {
|
|
ret.readable_properties.insert(prop);
|
|
}
|
|
collector->Finish(&ret.user_collected_properties);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
std::string BlockBasedTableBuilder::GetFileChecksum() const {
|
|
if (rep_->file != nullptr) {
|
|
return rep_->file->GetFileChecksum();
|
|
} else {
|
|
return kUnknownFileChecksum;
|
|
}
|
|
}
|
|
|
|
const char* BlockBasedTableBuilder::GetFileChecksumFuncName() const {
|
|
if (rep_->file != nullptr) {
|
|
return rep_->file->GetFileChecksumFuncName();
|
|
} else {
|
|
return kUnknownFileChecksumFuncName.c_str();
|
|
}
|
|
}
|
|
|
|
const std::string BlockBasedTable::kFilterBlockPrefix = "filter.";
|
|
const std::string BlockBasedTable::kFullFilterBlockPrefix = "fullfilter.";
|
|
const std::string BlockBasedTable::kPartitionedFilterBlockPrefix =
|
|
"partitionedfilter.";
|
|
} // namespace ROCKSDB_NAMESPACE
|