a207c27809
Summary: Use DB session ids in SST table properties to make cache keys stable across DB re-open and copy / move / restore / etc. These new cache keys are currently only enabled when FileSystem does not provide GetUniqueId. For now, they are typically larger, so slightly less efficient. Relevant to https://github.com/facebook/rocksdb/issues/7405 This change has a minor regression in PersistentCache functionality: metaindex blocks are no longer cached in PersistentCache. Table properties blocks already were not but ideally should be. I didn't spent effort to fix & test these issues because we don't believe PersistentCache is used much if at all and expect SecondaryCache to replace it. (Though PRs are welcome.) FIXME: there is more to be fixed for stable cache keys on external SST files Pull Request resolved: https://github.com/facebook/rocksdb/pull/8659 Test Plan: new unit test added, which fails when disabling new functionality Reviewed By: zhichao-cao Differential Revision: D30297705 Pulled By: pdillinger fbshipit-source-id: e8539a5c8802a79340405629870f2e3fb3822d3a
2061 lines
77 KiB
C++
2061 lines
77 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 <numeric>
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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 "memory/memory_allocator.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/filter_policy.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/block_like_traits.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 "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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// 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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assert(table_opt.filter_policy); // precondition
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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, until the end of a
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// data block potentially with many keys, we take the lower bound as
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// 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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} // 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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assert(type);
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assert(compressed_output);
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assert(compressed_output->empty());
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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(
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static_cast<int>(info.SampleForCompression()))) {
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// Sampling with a fast compression algorithm
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if (sampled_output_fast && (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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CompressData(raw, info_tmp, GetCompressFormatForVersion(format_version),
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sampled_output_fast);
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}
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// Sampling with a slow but high-compression algorithm
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if (sampled_output_slow && (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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CompressData(raw, info_tmp, GetCompressFormatForVersion(format_version),
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sampled_output_slow);
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}
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}
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if (info.type() == kNoCompression) {
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*type = kNoCompression;
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return raw;
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}
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// Actually compress the data; if the compression method is not supported,
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// or the compression fails etc., just fall back to uncompressed
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if (!CompressData(raw, info, GetCompressFormatForVersion(format_version),
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compressed_output)) {
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*type = kNoCompression;
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return raw;
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}
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// Check the compression ratio; if it's not good enough, just fall back to
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// uncompressed
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if (!GoodCompressionRatio(compressed_output->size(), raw.size())) {
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*type = kNoCompression;
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return raw;
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}
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*type = info.type();
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return *compressed_output;
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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 /* block_raw_bytes */,
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uint64_t /* block_compressed_bytes_fast */,
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uint64_t /* block_compressed_bytes_slow */) 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 ImmutableOptions 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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size_t alignment;
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BlockBuilder data_block;
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// Buffers uncompressed data blocks 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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std::vector<std::string> data_block_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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std::atomic<uint64_t> compressible_input_data_bytes;
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std::atomic<uint64_t> uncompressible_input_data_bytes;
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std::atomic<uint64_t> sampled_input_data_bytes;
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std::atomic<uint64_t> sampled_output_slow_data_bytes;
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std::atomic<uint64_t> sampled_output_fast_data_bytes;
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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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// `kBuffered` state is allowed only as long as the buffering of uncompressed
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// data blocks (see `data_block_buffers`) does not exceed `buffer_limit`.
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uint64_t buffer_limit;
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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 cache_key_prefix[BlockBasedTable::kMaxCacheKeyPrefixSize];
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size_t cache_key_prefix_size;
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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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uint32_t column_family_id;
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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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uint64_t file_creation_time = 0;
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// DB IDs
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const std::string db_id;
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const std::string db_session_id;
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std::string db_host_id;
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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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bool IsParallelCompressionEnabled() const {
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return compression_opts.parallel_threads > 1;
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}
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Status GetStatus() {
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// We need to make modifications of status visible when status_ok is set
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// to false, and this is ensured by status_mutex, so no special memory
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// order for status_ok is required.
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if (status_ok.load(std::memory_order_relaxed)) {
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return Status::OK();
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} else {
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return CopyStatus();
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}
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}
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Status CopyStatus() {
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std::lock_guard<std::mutex> lock(status_mutex);
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return status;
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}
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IOStatus GetIOStatus() {
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// We need to make modifications of io_status visible when status_ok is set
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// to false, and this is ensured by io_status_mutex, so no special memory
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// order for io_status_ok is required.
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if (io_status_ok.load(std::memory_order_relaxed)) {
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return IOStatus::OK();
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} else {
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return CopyIOStatus();
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}
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}
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IOStatus CopyIOStatus() {
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std::lock_guard<std::mutex> lock(io_status_mutex);
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return io_status;
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}
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// Never erase an existing status that is not OK.
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void SetStatus(Status s) {
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if (!s.ok() && status_ok.load(std::memory_order_relaxed)) {
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// Locking is an overkill for non compression_opts.parallel_threads
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// case but since it's unlikely that s is not OK, we take this cost
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// to be simplicity.
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std::lock_guard<std::mutex> lock(status_mutex);
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status = s;
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status_ok.store(false, std::memory_order_relaxed);
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}
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}
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// Never erase an existing I/O status that is not OK.
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void SetIOStatus(IOStatus ios) {
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if (!ios.ok() && io_status_ok.load(std::memory_order_relaxed)) {
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// Locking is an overkill for non compression_opts.parallel_threads
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// case but since it's unlikely that s is not OK, we take this cost
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// to be simplicity.
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std::lock_guard<std::mutex> lock(io_status_mutex);
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io_status = ios;
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io_status_ok.store(false, std::memory_order_relaxed);
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}
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}
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Rep(const BlockBasedTableOptions& table_opt, const TableBuilderOptions& tbo,
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WritableFileWriter* f)
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: ioptions(tbo.ioptions),
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moptions(tbo.moptions),
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table_options(table_opt),
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internal_comparator(tbo.internal_comparator),
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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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tbo.internal_comparator.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(tbo.moptions.prefix_extractor.get()),
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compression_type(tbo.compression_type),
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sample_for_compression(tbo.moptions.sample_for_compression),
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compressible_input_data_bytes(0),
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uncompressible_input_data_bytes(0),
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sampled_input_data_bytes(0),
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sampled_output_slow_data_bytes(0),
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sampled_output_fast_data_bytes(0),
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compression_opts(tbo.compression_opts),
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compression_dict(),
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compression_ctxs(tbo.compression_opts.parallel_threads),
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verify_ctxs(tbo.compression_opts.parallel_threads),
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verify_dict(),
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state((tbo.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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cache_key_prefix_size(0),
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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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column_family_id(tbo.column_family_id),
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column_family_name(tbo.column_family_name),
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creation_time(tbo.creation_time),
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oldest_key_time(tbo.oldest_key_time),
|
|
file_creation_time(tbo.file_creation_time),
|
|
db_id(tbo.db_id),
|
|
db_session_id(tbo.db_session_id),
|
|
db_host_id(ioptions.db_host_id),
|
|
status_ok(true),
|
|
io_status_ok(true) {
|
|
if (tbo.target_file_size == 0) {
|
|
buffer_limit = compression_opts.max_dict_buffer_bytes;
|
|
} else if (compression_opts.max_dict_buffer_bytes == 0) {
|
|
buffer_limit = tbo.target_file_size;
|
|
} else {
|
|
buffer_limit = std::min(tbo.target_file_size,
|
|
compression_opts.max_dict_buffer_bytes);
|
|
}
|
|
for (uint32_t i = 0; i < compression_opts.parallel_threads; i++) {
|
|
compression_ctxs[i].reset(new CompressionContext(compression_type));
|
|
}
|
|
if (table_options.index_type ==
|
|
BlockBasedTableOptions::kTwoLevelIndexSearch) {
|
|
p_index_builder_ = PartitionedIndexBuilder::CreateIndexBuilder(
|
|
&internal_comparator, use_delta_encoding_for_index_values,
|
|
table_options);
|
|
index_builder.reset(p_index_builder_);
|
|
} else {
|
|
index_builder.reset(IndexBuilder::CreateIndexBuilder(
|
|
table_options.index_type, &internal_comparator,
|
|
&this->internal_prefix_transform, use_delta_encoding_for_index_values,
|
|
table_options));
|
|
}
|
|
if (ioptions.optimize_filters_for_hits && tbo.is_bottommost) {
|
|
// Apply optimize_filters_for_hits setting here when applicable by
|
|
// skipping filter generation
|
|
filter_builder.reset();
|
|
} else if (tbo.skip_filters) {
|
|
// For SstFileWriter skip_filters
|
|
filter_builder.reset();
|
|
} else if (!table_options.filter_policy) {
|
|
// Null filter_policy -> no filter
|
|
filter_builder.reset();
|
|
} else {
|
|
FilterBuildingContext filter_context(table_options);
|
|
|
|
filter_context.info_log = ioptions.logger;
|
|
filter_context.column_family_name = tbo.column_family_name;
|
|
filter_context.reason = tbo.reason;
|
|
|
|
// Only populate other fields if known to be in LSM rather than
|
|
// generating external SST file
|
|
if (tbo.reason != TableFileCreationReason::kMisc) {
|
|
filter_context.compaction_style = ioptions.compaction_style;
|
|
filter_context.num_levels = ioptions.num_levels;
|
|
filter_context.level_at_creation = tbo.level_at_creation;
|
|
filter_context.is_bottommost = tbo.is_bottommost;
|
|
assert(filter_context.level_at_creation < filter_context.num_levels);
|
|
}
|
|
|
|
filter_builder.reset(CreateFilterBlockBuilder(
|
|
ioptions, moptions, filter_context,
|
|
use_delta_encoding_for_index_values, p_index_builder_));
|
|
}
|
|
|
|
assert(tbo.int_tbl_prop_collector_factories);
|
|
for (auto& factory : *tbo.int_tbl_prop_collector_factories) {
|
|
assert(factory);
|
|
|
|
table_properties_collectors.emplace_back(
|
|
factory->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(compression_type));
|
|
}
|
|
}
|
|
|
|
if (!ReifyDbHostIdProperty(ioptions.env, &db_host_id).ok()) {
|
|
ROCKS_LOG_INFO(ioptions.logger, "db_host_id property will not be set");
|
|
}
|
|
}
|
|
|
|
Rep(const Rep&) = delete;
|
|
Rep& operator=(const Rep&) = delete;
|
|
|
|
private:
|
|
// Synchronize status & io_status accesses across threads from main thread,
|
|
// compression thread and write thread in parallel compression.
|
|
std::mutex status_mutex;
|
|
std::atomic<bool> status_ok;
|
|
Status status;
|
|
std::mutex io_status_mutex;
|
|
std::atomic<bool> io_status_ok;
|
|
IOStatus io_status;
|
|
};
|
|
|
|
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;
|
|
Slice compressed_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;
|
|
|
|
// Estimate output file size when parallel compression is enabled. This is
|
|
// necessary because compression & flush are no longer synchronized,
|
|
// and BlockBasedTableBuilder::FileSize() is no longer accurate.
|
|
// memory_order_relaxed suffices because accurate statistics is not required.
|
|
class FileSizeEstimator {
|
|
public:
|
|
explicit FileSizeEstimator()
|
|
: raw_bytes_compressed(0),
|
|
raw_bytes_curr_block(0),
|
|
raw_bytes_curr_block_set(false),
|
|
raw_bytes_inflight(0),
|
|
blocks_inflight(0),
|
|
curr_compression_ratio(0),
|
|
estimated_file_size(0) {}
|
|
|
|
// Estimate file size when a block is about to be emitted to
|
|
// compression thread
|
|
void EmitBlock(uint64_t raw_block_size, uint64_t curr_file_size) {
|
|
uint64_t new_raw_bytes_inflight =
|
|
raw_bytes_inflight.fetch_add(raw_block_size,
|
|
std::memory_order_relaxed) +
|
|
raw_block_size;
|
|
|
|
uint64_t new_blocks_inflight =
|
|
blocks_inflight.fetch_add(1, std::memory_order_relaxed) + 1;
|
|
|
|
estimated_file_size.store(
|
|
curr_file_size +
|
|
static_cast<uint64_t>(
|
|
static_cast<double>(new_raw_bytes_inflight) *
|
|
curr_compression_ratio.load(std::memory_order_relaxed)) +
|
|
new_blocks_inflight * kBlockTrailerSize,
|
|
std::memory_order_relaxed);
|
|
}
|
|
|
|
// Estimate file size when a block is already reaped from
|
|
// compression thread
|
|
void ReapBlock(uint64_t compressed_block_size, uint64_t curr_file_size) {
|
|
assert(raw_bytes_curr_block_set);
|
|
|
|
uint64_t new_raw_bytes_compressed =
|
|
raw_bytes_compressed + raw_bytes_curr_block;
|
|
assert(new_raw_bytes_compressed > 0);
|
|
|
|
curr_compression_ratio.store(
|
|
(curr_compression_ratio.load(std::memory_order_relaxed) *
|
|
raw_bytes_compressed +
|
|
compressed_block_size) /
|
|
static_cast<double>(new_raw_bytes_compressed),
|
|
std::memory_order_relaxed);
|
|
raw_bytes_compressed = new_raw_bytes_compressed;
|
|
|
|
uint64_t new_raw_bytes_inflight =
|
|
raw_bytes_inflight.fetch_sub(raw_bytes_curr_block,
|
|
std::memory_order_relaxed) -
|
|
raw_bytes_curr_block;
|
|
|
|
uint64_t new_blocks_inflight =
|
|
blocks_inflight.fetch_sub(1, std::memory_order_relaxed) - 1;
|
|
|
|
estimated_file_size.store(
|
|
curr_file_size +
|
|
static_cast<uint64_t>(
|
|
static_cast<double>(new_raw_bytes_inflight) *
|
|
curr_compression_ratio.load(std::memory_order_relaxed)) +
|
|
new_blocks_inflight * kBlockTrailerSize,
|
|
std::memory_order_relaxed);
|
|
|
|
raw_bytes_curr_block_set = false;
|
|
}
|
|
|
|
void SetEstimatedFileSize(uint64_t size) {
|
|
estimated_file_size.store(size, std::memory_order_relaxed);
|
|
}
|
|
|
|
uint64_t GetEstimatedFileSize() {
|
|
return estimated_file_size.load(std::memory_order_relaxed);
|
|
}
|
|
|
|
void SetCurrBlockRawSize(uint64_t size) {
|
|
raw_bytes_curr_block = size;
|
|
raw_bytes_curr_block_set = true;
|
|
}
|
|
|
|
private:
|
|
// Raw bytes compressed so far.
|
|
uint64_t raw_bytes_compressed;
|
|
// Size of current block being appended.
|
|
uint64_t raw_bytes_curr_block;
|
|
// Whether raw_bytes_curr_block has been set for next
|
|
// ReapBlock call.
|
|
bool raw_bytes_curr_block_set;
|
|
// 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;
|
|
};
|
|
FileSizeEstimator file_size_estimator;
|
|
|
|
// Facilities used for waiting first block completion. Need to Wait for
|
|
// the completion of first block compression and flush to get a non-zero
|
|
// compression ratio.
|
|
std::atomic<bool> first_block_processed;
|
|
std::condition_variable first_block_cond;
|
|
std::mutex first_block_mutex;
|
|
|
|
explicit 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),
|
|
first_block_processed(false) {
|
|
for (uint32_t i = 0; i < parallel_threads; i++) {
|
|
block_rep_buf[i].contents = Slice();
|
|
block_rep_buf[i].compressed_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(); }
|
|
|
|
// Make a block prepared to be emitted to compression thread
|
|
// Used in non-buffered mode
|
|
BlockRep* PrepareBlock(CompressionType compression_type,
|
|
const Slice* first_key_in_next_block,
|
|
BlockBuilder* data_block) {
|
|
BlockRep* block_rep =
|
|
PrepareBlockInternal(compression_type, first_key_in_next_block);
|
|
assert(block_rep != nullptr);
|
|
data_block->SwapAndReset(*(block_rep->data));
|
|
block_rep->contents = *(block_rep->data);
|
|
std::swap(block_rep->keys, curr_block_keys);
|
|
curr_block_keys->Clear();
|
|
return block_rep;
|
|
}
|
|
|
|
// Used in EnterUnbuffered
|
|
BlockRep* PrepareBlock(CompressionType compression_type,
|
|
const Slice* first_key_in_next_block,
|
|
std::string* data_block,
|
|
std::vector<std::string>* keys) {
|
|
BlockRep* block_rep =
|
|
PrepareBlockInternal(compression_type, first_key_in_next_block);
|
|
assert(block_rep != nullptr);
|
|
std::swap(*(block_rep->data), *data_block);
|
|
block_rep->contents = *(block_rep->data);
|
|
block_rep->keys->SwapAssign(*keys);
|
|
return block_rep;
|
|
}
|
|
|
|
// Emit a block to compression thread
|
|
void EmitBlock(BlockRep* block_rep) {
|
|
assert(block_rep != nullptr);
|
|
assert(block_rep->status.ok());
|
|
if (!write_queue.push(block_rep->slot.get())) {
|
|
return;
|
|
}
|
|
if (!compress_queue.push(block_rep)) {
|
|
return;
|
|
}
|
|
|
|
if (!first_block_processed.load(std::memory_order_relaxed)) {
|
|
std::unique_lock<std::mutex> lock(first_block_mutex);
|
|
first_block_cond.wait(lock, [this] {
|
|
return first_block_processed.load(std::memory_order_relaxed);
|
|
});
|
|
}
|
|
}
|
|
|
|
// Reap a block from compression thread
|
|
void ReapBlock(BlockRep* block_rep) {
|
|
assert(block_rep != nullptr);
|
|
block_rep->compressed_data->clear();
|
|
block_rep_pool.push(block_rep);
|
|
|
|
if (!first_block_processed.load(std::memory_order_relaxed)) {
|
|
std::lock_guard<std::mutex> lock(first_block_mutex);
|
|
first_block_processed.store(true, std::memory_order_relaxed);
|
|
first_block_cond.notify_one();
|
|
}
|
|
}
|
|
|
|
private:
|
|
BlockRep* PrepareBlockInternal(CompressionType compression_type,
|
|
const Slice* first_key_in_next_block) {
|
|
BlockRep* block_rep = nullptr;
|
|
block_rep_pool.pop(block_rep);
|
|
assert(block_rep != nullptr);
|
|
|
|
assert(block_rep->data);
|
|
|
|
block_rep->compression_type = compression_type;
|
|
|
|
if (first_key_in_next_block == nullptr) {
|
|
block_rep->first_key_in_next_block.reset(nullptr);
|
|
} else {
|
|
block_rep->first_key_in_next_block->assign(
|
|
first_key_in_next_block->data(), first_key_in_next_block->size());
|
|
}
|
|
|
|
return block_rep;
|
|
}
|
|
};
|
|
|
|
BlockBasedTableBuilder::BlockBasedTableBuilder(
|
|
const BlockBasedTableOptions& table_options, const TableBuilderOptions& tbo,
|
|
WritableFileWriter* file) {
|
|
BlockBasedTableOptions sanitized_table_options(table_options);
|
|
if (sanitized_table_options.format_version == 0 &&
|
|
sanitized_table_options.checksum != kCRC32c) {
|
|
ROCKS_LOG_WARN(
|
|
tbo.ioptions.logger,
|
|
"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(sanitized_table_options, tbo, file);
|
|
|
|
if (rep_->filter_builder != nullptr) {
|
|
rep_->filter_builder->StartBlock(0);
|
|
}
|
|
|
|
SetupCacheKeyPrefix(tbo);
|
|
|
|
if (rep_->IsParallelCompressionEnabled()) {
|
|
StartParallelCompression();
|
|
}
|
|
}
|
|
|
|
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->buffer_limit != 0 &&
|
|
r->data_begin_offset > r->buffer_limit) {
|
|
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->IsParallelCompressionEnabled()) {
|
|
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->IsParallelCompressionEnabled()) {
|
|
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) {
|
|
// Buffered keys will be replayed from data_block_buffers during
|
|
// `Finish()` once compression dictionary has been finalized.
|
|
} else {
|
|
if (!r->IsParallelCompressionEnabled()) {
|
|
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.logger);
|
|
|
|
} 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.logger);
|
|
} 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->IsParallelCompressionEnabled() &&
|
|
r->state == Rep::State::kUnbuffered) {
|
|
r->data_block.Finish();
|
|
ParallelCompressionRep::BlockRep* block_rep = r->pc_rep->PrepareBlock(
|
|
r->compression_type, r->first_key_in_next_block, &(r->data_block));
|
|
assert(block_rep != nullptr);
|
|
r->pc_rep->file_size_estimator.EmitBlock(block_rep->data->size(),
|
|
r->get_offset());
|
|
r->pc_rep->EmitBlock(block_rep);
|
|
} else {
|
|
WriteBlock(&r->data_block, &r->pending_handle, BlockType::kData);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteBlock(BlockBuilder* block,
|
|
BlockHandle* handle,
|
|
BlockType block_type) {
|
|
block->Finish();
|
|
std::string raw_block_contents;
|
|
block->SwapAndReset(raw_block_contents);
|
|
if (rep_->state == Rep::State::kBuffered) {
|
|
assert(block_type == BlockType::kData);
|
|
rep_->data_block_buffers.emplace_back(std::move(raw_block_contents));
|
|
rep_->data_begin_offset += rep_->data_block_buffers.back().size();
|
|
return;
|
|
}
|
|
WriteBlock(raw_block_contents, handle, block_type);
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteBlock(const Slice& raw_block_contents,
|
|
BlockHandle* handle,
|
|
BlockType block_type) {
|
|
Rep* r = rep_;
|
|
assert(r->state == Rep::State::kUnbuffered);
|
|
Slice block_contents;
|
|
CompressionType type;
|
|
Status compress_status;
|
|
bool is_data_block = block_type == BlockType::kData;
|
|
CompressAndVerifyBlock(raw_block_contents, is_data_block,
|
|
*(r->compression_ctxs[0]), r->verify_ctxs[0].get(),
|
|
&(r->compressed_output), &(block_contents), &type,
|
|
&compress_status);
|
|
r->SetStatus(compress_status);
|
|
if (!ok()) {
|
|
return;
|
|
}
|
|
|
|
WriteRawBlock(block_contents, type, handle, block_type, &raw_block_contents);
|
|
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(
|
|
const CompressionContext& compression_ctx,
|
|
UncompressionContext* verify_ctx) {
|
|
ParallelCompressionRep::BlockRep* block_rep = nullptr;
|
|
while (rep_->pc_rep->compress_queue.pop(block_rep)) {
|
|
assert(block_rep != nullptr);
|
|
CompressAndVerifyBlock(block_rep->contents, true, /* is_data_block*/
|
|
compression_ctx, verify_ctx,
|
|
block_rep->compressed_data.get(),
|
|
&block_rep->compressed_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,
|
|
const CompressionContext& compression_ctx, UncompressionContext* verify_ctx,
|
|
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
|
|
Rep* r = rep_;
|
|
bool is_status_ok = ok();
|
|
if (!r->IsParallelCompressionEnabled()) {
|
|
assert(is_status_ok);
|
|
}
|
|
|
|
*type = r->compression_type;
|
|
uint64_t sample_for_compression = r->sample_for_compression;
|
|
bool abort_compression = false;
|
|
|
|
StopWatchNano timer(
|
|
r->ioptions.clock,
|
|
ShouldReportDetailedTime(r->ioptions.env, r->ioptions.stats));
|
|
|
|
if (is_status_ok && raw_block_contents.size() < kCompressionSizeLimit) {
|
|
if (is_data_block) {
|
|
r->compressible_input_data_bytes.fetch_add(raw_block_contents.size(),
|
|
std::memory_order_relaxed);
|
|
}
|
|
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);
|
|
|
|
if (sampled_output_slow.size() > 0 || sampled_output_fast.size() > 0) {
|
|
// Currently compression sampling is only enabled for data block.
|
|
assert(is_data_block);
|
|
r->sampled_input_data_bytes.fetch_add(raw_block_contents.size(),
|
|
std::memory_order_relaxed);
|
|
r->sampled_output_slow_data_bytes.fetch_add(sampled_output_slow.size(),
|
|
std::memory_order_relaxed);
|
|
r->sampled_output_fast_data_bytes.fetch_add(sampled_output_fast.size(),
|
|
std::memory_order_relaxed);
|
|
}
|
|
// 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, *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.logger,
|
|
"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(std::string("Could not decompress: ") +
|
|
stat.getState());
|
|
abort_compression = true;
|
|
}
|
|
}
|
|
} else {
|
|
// Block is too big to be compressed.
|
|
if (is_data_block) {
|
|
r->uncompressible_input_data_bytes.fetch_add(raw_block_contents.size(),
|
|
std::memory_order_relaxed);
|
|
}
|
|
abort_compression = true;
|
|
}
|
|
if (is_data_block) {
|
|
r->uncompressible_input_data_bytes.fetch_add(kBlockTrailerSize,
|
|
std::memory_order_relaxed);
|
|
}
|
|
|
|
// Abort compression if the block is too big, or did not pass
|
|
// verification.
|
|
if (abort_compression) {
|
|
RecordTick(r->ioptions.stats, NUMBER_BLOCK_NOT_COMPRESSED);
|
|
*type = kNoCompression;
|
|
*block_contents = raw_block_contents;
|
|
} else if (*type != kNoCompression) {
|
|
if (ShouldReportDetailedTime(r->ioptions.env, r->ioptions.stats)) {
|
|
RecordTimeToHistogram(r->ioptions.stats, COMPRESSION_TIMES_NANOS,
|
|
timer.ElapsedNanos());
|
|
}
|
|
RecordInHistogram(r->ioptions.stats, BYTES_COMPRESSED,
|
|
raw_block_contents.size());
|
|
RecordTick(r->ioptions.stats, NUMBER_BLOCK_COMPRESSED);
|
|
} else if (*type != r->compression_type) {
|
|
RecordTick(r->ioptions.stats, NUMBER_BLOCK_NOT_COMPRESSED);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteRawBlock(const Slice& block_contents,
|
|
CompressionType type,
|
|
BlockHandle* handle,
|
|
BlockType block_type,
|
|
const Slice* raw_block_contents) {
|
|
Rep* r = rep_;
|
|
bool is_data_block = block_type == BlockType::kData;
|
|
Status s = Status::OK();
|
|
IOStatus io_s = IOStatus::OK();
|
|
StopWatch sw(r->ioptions.clock, r->ioptions.stats, 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;
|
|
uint32_t checksum = 0;
|
|
switch (r->table_options.checksum) {
|
|
case kNoChecksum:
|
|
break;
|
|
case kCRC32c: {
|
|
uint32_t crc =
|
|
crc32c::Value(block_contents.data(), block_contents.size());
|
|
// Extend to cover compression type
|
|
crc = crc32c::Extend(crc, trailer, 1);
|
|
checksum = crc32c::Mask(crc);
|
|
break;
|
|
}
|
|
case kxxHash: {
|
|
XXH32_state_t* const state = XXH32_createState();
|
|
XXH32_reset(state, 0);
|
|
XXH32_update(state, block_contents.data(), block_contents.size());
|
|
// Extend to cover compression type
|
|
XXH32_update(state, trailer, 1);
|
|
checksum = 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(), block_contents.size());
|
|
// Extend to cover compression type
|
|
XXH64_update(state, trailer, 1);
|
|
checksum = Lower32of64(XXH64_digest(state));
|
|
XXH64_freeState(state);
|
|
break;
|
|
}
|
|
default:
|
|
assert(false);
|
|
break;
|
|
}
|
|
EncodeFixed32(trailer + 1, checksum);
|
|
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()) {
|
|
assert(s.ok());
|
|
if (r->table_options.prepopulate_block_cache ==
|
|
BlockBasedTableOptions::PrepopulateBlockCache::kFlushOnly) {
|
|
if (type == kNoCompression) {
|
|
s = InsertBlockInCacheHelper(block_contents, handle, block_type);
|
|
} else if (raw_block_contents != nullptr) {
|
|
s = InsertBlockInCacheHelper(*raw_block_contents, handle, block_type);
|
|
}
|
|
if (!s.ok()) {
|
|
r->SetStatus(s);
|
|
}
|
|
}
|
|
// TODO:: Should InsertBlockInCompressedCache take into account error from
|
|
// InsertBlockInCache or ignore and overwrite it.
|
|
s = InsertBlockInCompressedCache(block_contents, type, handle);
|
|
if (!s.ok()) {
|
|
r->SetStatus(s);
|
|
}
|
|
} else {
|
|
r->SetIOStatus(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 {
|
|
r->SetIOStatus(io_s);
|
|
}
|
|
}
|
|
if (r->IsParallelCompressionEnabled()) {
|
|
if (is_data_block) {
|
|
r->pc_rep->file_size_estimator.ReapBlock(block_contents.size(),
|
|
r->get_offset());
|
|
} else {
|
|
r->pc_rep->file_size_estimator.SetEstimatedFileSize(r->get_offset());
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
r->SetIOStatus(io_s);
|
|
}
|
|
if (!io_s.ok() && s.ok()) {
|
|
r->SetStatus(io_s);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::BGWorkWriteRawBlock() {
|
|
Rep* r = rep_;
|
|
ParallelCompressionRep::BlockRepSlot* slot = nullptr;
|
|
ParallelCompressionRep::BlockRep* block_rep = nullptr;
|
|
while (r->pc_rep->write_queue.pop(slot)) {
|
|
assert(slot != nullptr);
|
|
slot->Take(block_rep);
|
|
assert(block_rep != nullptr);
|
|
if (!block_rep->status.ok()) {
|
|
r->SetStatus(block_rep->status);
|
|
// Reap block so that blocked Flush() can finish
|
|
// if there is one, and Flush() will notice !ok() next time.
|
|
block_rep->status = Status::OK();
|
|
r->pc_rep->ReapBlock(block_rep);
|
|
continue;
|
|
}
|
|
|
|
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->file_size_estimator.SetCurrBlockRawSize(block_rep->data->size());
|
|
WriteRawBlock(block_rep->compressed_contents, block_rep->compression_type,
|
|
&r->pending_handle, BlockType::kData, &block_rep->contents);
|
|
if (!ok()) {
|
|
break;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
r->pc_rep->ReapBlock(block_rep);
|
|
}
|
|
}
|
|
|
|
void BlockBasedTableBuilder::StartParallelCompression() {
|
|
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(); }));
|
|
}
|
|
|
|
void BlockBasedTableBuilder::StopParallelCompression() {
|
|
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();
|
|
}
|
|
|
|
Status BlockBasedTableBuilder::status() const { return rep_->GetStatus(); }
|
|
|
|
IOStatus BlockBasedTableBuilder::io_status() const {
|
|
return rep_->GetIOStatus();
|
|
}
|
|
|
|
namespace {
|
|
// Delete the entry resided in the cache.
|
|
template <class Entry>
|
|
void DeleteEntryCached(const Slice& /*key*/, void* value) {
|
|
auto entry = reinterpret_cast<Entry*>(value);
|
|
delete entry;
|
|
}
|
|
} // namespace
|
|
|
|
// Helper function to setup the cache key's prefix for the Table.
|
|
void BlockBasedTableBuilder::SetupCacheKeyPrefix(
|
|
const TableBuilderOptions& tbo) {
|
|
// FIXME: Unify with BlockBasedTable::SetupCacheKeyPrefix
|
|
if (rep_->table_options.block_cache.get() != nullptr) {
|
|
BlockBasedTable::GenerateCachePrefix<Cache, FSWritableFile>(
|
|
rep_->table_options.block_cache.get(), rep_->file->writable_file(),
|
|
&rep_->cache_key_prefix[0], &rep_->cache_key_prefix_size,
|
|
tbo.db_session_id, tbo.cur_file_num);
|
|
}
|
|
if (rep_->table_options.block_cache_compressed.get() != nullptr) {
|
|
BlockBasedTable::GenerateCachePrefix<Cache, FSWritableFile>(
|
|
rep_->table_options.block_cache_compressed.get(),
|
|
rep_->file->writable_file(), &rep_->compressed_cache_key_prefix[0],
|
|
&rep_->compressed_cache_key_prefix_size, tbo.db_session_id,
|
|
tbo.cur_file_num);
|
|
}
|
|
}
|
|
|
|
//
|
|
// Make a copy of the block contents and insert into compressed block cache
|
|
//
|
|
Status BlockBasedTableBuilder::InsertBlockInCompressedCache(
|
|
const Slice& block_contents, const CompressionType type,
|
|
const BlockHandle* handle) {
|
|
Rep* r = rep_;
|
|
Cache* block_cache_compressed = r->table_options.block_cache_compressed.get();
|
|
Status s;
|
|
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));
|
|
|
|
s = block_cache_compressed->Insert(
|
|
key, block_contents_to_cache,
|
|
block_contents_to_cache->ApproximateMemoryUsage(),
|
|
&DeleteEntryCached<BlockContents>);
|
|
if (s.ok()) {
|
|
RecordTick(rep_->ioptions.stats, BLOCK_CACHE_COMPRESSED_ADD);
|
|
} else {
|
|
RecordTick(rep_->ioptions.stats, BLOCK_CACHE_COMPRESSED_ADD_FAILURES);
|
|
}
|
|
// Invalidate OS cache.
|
|
r->file->InvalidateCache(static_cast<size_t>(r->get_offset()), size)
|
|
.PermitUncheckedError();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status BlockBasedTableBuilder::InsertBlockInCacheHelper(
|
|
const Slice& block_contents, const BlockHandle* handle,
|
|
BlockType block_type) {
|
|
Status s;
|
|
if (block_type == BlockType::kData || block_type == BlockType::kIndex) {
|
|
s = InsertBlockInCache<Block>(block_contents, handle, block_type);
|
|
} else if (block_type == BlockType::kFilter) {
|
|
if (rep_->filter_builder->IsBlockBased()) {
|
|
s = InsertBlockInCache<Block>(block_contents, handle, block_type);
|
|
} else {
|
|
s = InsertBlockInCache<ParsedFullFilterBlock>(block_contents, handle,
|
|
block_type);
|
|
}
|
|
} else if (block_type == BlockType::kCompressionDictionary) {
|
|
s = InsertBlockInCache<UncompressionDict>(block_contents, handle,
|
|
block_type);
|
|
}
|
|
return s;
|
|
}
|
|
|
|
template <typename TBlocklike>
|
|
Status BlockBasedTableBuilder::InsertBlockInCache(const Slice& block_contents,
|
|
const BlockHandle* handle,
|
|
BlockType block_type) {
|
|
// Uncompressed regular block cache
|
|
Cache* block_cache = rep_->table_options.block_cache.get();
|
|
Status s;
|
|
if (block_cache != nullptr) {
|
|
size_t size = block_contents.size();
|
|
auto buf = AllocateBlock(size, block_cache->memory_allocator());
|
|
memcpy(buf.get(), block_contents.data(), size);
|
|
BlockContents results(std::move(buf), size);
|
|
|
|
char
|
|
cache_key[BlockBasedTable::kMaxCacheKeyPrefixSize + kMaxVarint64Length];
|
|
Slice key = BlockBasedTable::GetCacheKey(rep_->cache_key_prefix,
|
|
rep_->cache_key_prefix_size,
|
|
*handle, cache_key);
|
|
|
|
const size_t read_amp_bytes_per_bit =
|
|
rep_->table_options.read_amp_bytes_per_bit;
|
|
|
|
// TODO akanksha:: Dedup below code by calling
|
|
// BlockBasedTable::PutDataBlockToCache.
|
|
std::unique_ptr<TBlocklike> block_holder(
|
|
BlocklikeTraits<TBlocklike>::Create(
|
|
std::move(results), read_amp_bytes_per_bit,
|
|
rep_->ioptions.statistics.get(),
|
|
false /*rep_->blocks_definitely_zstd_compressed*/,
|
|
rep_->table_options.filter_policy.get()));
|
|
|
|
assert(block_holder->own_bytes());
|
|
size_t charge = block_holder->ApproximateMemoryUsage();
|
|
s = block_cache->Insert(
|
|
key, block_holder.get(),
|
|
BlocklikeTraits<TBlocklike>::GetCacheItemHelper(block_type), charge,
|
|
nullptr, Cache::Priority::LOW);
|
|
|
|
if (s.ok()) {
|
|
// Release ownership of block_holder.
|
|
block_holder.release();
|
|
BlockBasedTable::UpdateCacheInsertionMetrics(
|
|
block_type, nullptr /*get_context*/, charge, s.IsOkOverwritten(),
|
|
rep_->ioptions.stats);
|
|
} else {
|
|
RecordTick(rep_->ioptions.stats, BLOCK_CACHE_ADD_FAILURES);
|
|
}
|
|
}
|
|
return s;
|
|
}
|
|
|
|
void BlockBasedTableBuilder::WriteFilterBlock(
|
|
MetaIndexBuilder* meta_index_builder) {
|
|
BlockHandle filter_block_handle;
|
|
bool empty_filter_block =
|
|
(rep_->filter_builder == nullptr || rep_->filter_builder->IsEmpty());
|
|
if (ok() && !empty_filter_block) {
|
|
rep_->props.num_filter_entries +=
|
|
rep_->filter_builder->EstimateEntriesAdded();
|
|
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,
|
|
BlockType::kFilter);
|
|
}
|
|
}
|
|
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_->SetStatus(index_builder_status);
|
|
}
|
|
if (ok()) {
|
|
for (const auto& item : index_blocks.meta_blocks) {
|
|
BlockHandle block_handle;
|
|
WriteBlock(item.second, &block_handle, BlockType::kIndex);
|
|
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,
|
|
BlockType::kIndex);
|
|
} else {
|
|
WriteRawBlock(index_blocks.index_block_contents, kNoCompression,
|
|
index_block_handle, BlockType::kIndex);
|
|
}
|
|
}
|
|
// If there are more index partitions, finish them and write them out
|
|
if (index_builder_status.IsIncomplete()) {
|
|
Status s = Status::Incomplete();
|
|
while (ok() && s.IsIncomplete()) {
|
|
s = rep_->index_builder->Finish(&index_blocks, *index_block_handle);
|
|
if (!s.ok() && !s.IsIncomplete()) {
|
|
rep_->SetStatus(s);
|
|
return;
|
|
}
|
|
if (rep_->table_options.enable_index_compression) {
|
|
WriteBlock(index_blocks.index_block_contents, index_block_handle,
|
|
BlockType::kIndex);
|
|
} else {
|
|
WriteRawBlock(index_blocks.index_block_contents, kNoCompression,
|
|
index_block_handle, BlockType::kIndex);
|
|
}
|
|
// 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;
|
|
if (rep_->sampled_input_data_bytes > 0) {
|
|
rep_->props.slow_compression_estimated_data_size = static_cast<uint64_t>(
|
|
static_cast<double>(rep_->sampled_output_slow_data_bytes) /
|
|
rep_->sampled_input_data_bytes *
|
|
rep_->compressible_input_data_bytes +
|
|
rep_->uncompressible_input_data_bytes + 0.5);
|
|
rep_->props.fast_compression_estimated_data_size = static_cast<uint64_t>(
|
|
static_cast<double>(rep_->sampled_output_fast_data_bytes) /
|
|
rep_->sampled_input_data_bytes *
|
|
rep_->compressible_input_data_bytes +
|
|
rep_->uncompressible_input_data_bytes + 0.5);
|
|
} else if (rep_->sample_for_compression > 0) {
|
|
// We tried to sample but none were found. Assume worst-case (compression
|
|
// ratio 1.0) so data is complete and aggregatable.
|
|
rep_->props.slow_compression_estimated_data_size =
|
|
rep_->compressible_input_data_bytes +
|
|
rep_->uncompressible_input_data_bytes;
|
|
rep_->props.fast_compression_estimated_data_size =
|
|
rep_->compressible_input_data_bytes +
|
|
rep_->uncompressible_input_data_bytes;
|
|
}
|
|
rep_->props.db_id = rep_->db_id;
|
|
rep_->props.db_session_id = rep_->db_session_id;
|
|
rep_->props.db_host_id = rep_->db_host_id;
|
|
|
|
// Add basic properties
|
|
property_block_builder.AddTableProperty(rep_->props);
|
|
|
|
// Add use collected properties
|
|
NotifyCollectTableCollectorsOnFinish(rep_->table_properties_collectors,
|
|
rep_->ioptions.logger,
|
|
&property_block_builder);
|
|
|
|
WriteRawBlock(property_block_builder.Finish(), kNoCompression,
|
|
&properties_block_handle, BlockType::kProperties);
|
|
}
|
|
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,
|
|
BlockType::kCompressionDictionary);
|
|
#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, BlockType::kRangeDeletion);
|
|
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(ok());
|
|
IOStatus ios = r->file->Append(footer_encoding);
|
|
if (ios.ok()) {
|
|
r->set_offset(r->get_offset() + footer_encoding.size());
|
|
} else {
|
|
r->SetIOStatus(ios);
|
|
r->SetStatus(ios);
|
|
}
|
|
}
|
|
|
|
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;
|
|
const size_t kNumBlocksBuffered = r->data_block_buffers.size();
|
|
if (kNumBlocksBuffered == 0) {
|
|
// The below code is neither safe nor necessary for handling zero data
|
|
// blocks.
|
|
return;
|
|
}
|
|
|
|
// Abstract algebra teaches us that a finite cyclic group (such as the
|
|
// additive group of integers modulo N) can be generated by a number that is
|
|
// coprime with N. Since N is variable (number of buffered data blocks), we
|
|
// must then pick a prime number in order to guarantee coprimeness with any N.
|
|
//
|
|
// One downside of this approach is the spread will be poor when
|
|
// `kPrimeGeneratorRemainder` is close to zero or close to
|
|
// `kNumBlocksBuffered`.
|
|
//
|
|
// Picked a random number between one and one trillion and then chose the
|
|
// next prime number greater than or equal to it.
|
|
const uint64_t kPrimeGenerator = 545055921143ull;
|
|
// Can avoid repeated division by just adding the remainder repeatedly.
|
|
const size_t kPrimeGeneratorRemainder = static_cast<size_t>(
|
|
kPrimeGenerator % static_cast<uint64_t>(kNumBlocksBuffered));
|
|
const size_t kInitSampleIdx = kNumBlocksBuffered / 2;
|
|
|
|
std::string compression_dict_samples;
|
|
std::vector<size_t> compression_dict_sample_lens;
|
|
size_t buffer_idx = kInitSampleIdx;
|
|
for (size_t i = 0;
|
|
i < kNumBlocksBuffered && compression_dict_samples.size() < kSampleBytes;
|
|
++i) {
|
|
size_t copy_len = std::min(kSampleBytes - compression_dict_samples.size(),
|
|
r->data_block_buffers[buffer_idx].size());
|
|
compression_dict_samples.append(r->data_block_buffers[buffer_idx], 0,
|
|
copy_len);
|
|
compression_dict_sample_lens.emplace_back(copy_len);
|
|
|
|
buffer_idx += kPrimeGeneratorRemainder;
|
|
if (buffer_idx >= kNumBlocksBuffered) {
|
|
buffer_idx -= kNumBlocksBuffered;
|
|
}
|
|
}
|
|
|
|
// 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));
|
|
|
|
auto get_iterator_for_block = [&r](size_t i) {
|
|
auto& data_block = r->data_block_buffers[i];
|
|
assert(!data_block.empty());
|
|
|
|
Block reader{BlockContents{data_block}};
|
|
DataBlockIter* iter = reader.NewDataIterator(
|
|
r->internal_comparator.user_comparator(), kDisableGlobalSequenceNumber);
|
|
|
|
iter->SeekToFirst();
|
|
assert(iter->Valid());
|
|
return std::unique_ptr<DataBlockIter>(iter);
|
|
};
|
|
|
|
std::unique_ptr<DataBlockIter> iter = nullptr, next_block_iter = nullptr;
|
|
|
|
for (size_t i = 0; ok() && i < r->data_block_buffers.size(); ++i) {
|
|
if (iter == nullptr) {
|
|
iter = get_iterator_for_block(i);
|
|
assert(iter != nullptr);
|
|
};
|
|
|
|
if (i + 1 < r->data_block_buffers.size()) {
|
|
next_block_iter = get_iterator_for_block(i + 1);
|
|
}
|
|
|
|
auto& data_block = r->data_block_buffers[i];
|
|
|
|
if (r->IsParallelCompressionEnabled()) {
|
|
Slice first_key_in_next_block;
|
|
const Slice* first_key_in_next_block_ptr = &first_key_in_next_block;
|
|
if (i + 1 < r->data_block_buffers.size()) {
|
|
assert(next_block_iter != nullptr);
|
|
first_key_in_next_block = next_block_iter->key();
|
|
} else {
|
|
first_key_in_next_block_ptr = r->first_key_in_next_block;
|
|
}
|
|
|
|
std::vector<std::string> keys;
|
|
for (; iter->Valid(); iter->Next()) {
|
|
keys.emplace_back(iter->key().ToString());
|
|
}
|
|
|
|
ParallelCompressionRep::BlockRep* block_rep = r->pc_rep->PrepareBlock(
|
|
r->compression_type, first_key_in_next_block_ptr, &data_block, &keys);
|
|
|
|
assert(block_rep != nullptr);
|
|
r->pc_rep->file_size_estimator.EmitBlock(block_rep->data->size(),
|
|
r->get_offset());
|
|
r->pc_rep->EmitBlock(block_rep);
|
|
} else {
|
|
for (; iter->Valid(); iter->Next()) {
|
|
Slice key = iter->key();
|
|
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, BlockType::kData);
|
|
if (ok() && i + 1 < r->data_block_buffers.size()) {
|
|
assert(next_block_iter != nullptr);
|
|
Slice first_key_in_next_block = next_block_iter->key();
|
|
|
|
Slice* first_key_in_next_block_ptr = &first_key_in_next_block;
|
|
|
|
iter->SeekToLast();
|
|
std::string last_key = iter->key().ToString();
|
|
r->index_builder->AddIndexEntry(&last_key, first_key_in_next_block_ptr,
|
|
r->pending_handle);
|
|
}
|
|
}
|
|
|
|
std::swap(iter, next_block_iter);
|
|
}
|
|
r->data_block_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->IsParallelCompressionEnabled()) {
|
|
StopParallelCompression();
|
|
#ifndef NDEBUG
|
|
for (const auto& br : r->pc_rep->block_rep_buf) {
|
|
assert(br.status.ok());
|
|
}
|
|
#endif // !NDEBUG
|
|
} 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, BlockType::kMetaIndex);
|
|
}
|
|
if (ok()) {
|
|
WriteFooter(metaindex_block_handle, index_block_handle);
|
|
}
|
|
r->state = Rep::State::kClosed;
|
|
r->SetStatus(r->CopyIOStatus());
|
|
Status ret_status = r->CopyStatus();
|
|
assert(!ret_status.ok() || io_status().ok());
|
|
return ret_status;
|
|
}
|
|
|
|
void BlockBasedTableBuilder::Abandon() {
|
|
assert(rep_->state != Rep::State::kClosed);
|
|
if (rep_->IsParallelCompressionEnabled()) {
|
|
StopParallelCompression();
|
|
}
|
|
rep_->state = Rep::State::kClosed;
|
|
rep_->CopyStatus().PermitUncheckedError();
|
|
rep_->CopyIOStatus().PermitUncheckedError();
|
|
}
|
|
|
|
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_->IsParallelCompressionEnabled()) {
|
|
// Use compression ratio so far and inflight raw bytes to estimate
|
|
// final SST size.
|
|
return rep_->pc_rep->file_size_estimator.GetEstimatedFileSize();
|
|
} 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).PermitUncheckedError();
|
|
}
|
|
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;
|
|
}
|
|
}
|
|
|
|
const std::string BlockBasedTable::kFilterBlockPrefix = "filter.";
|
|
const std::string BlockBasedTable::kFullFilterBlockPrefix = "fullfilter.";
|
|
const std::string BlockBasedTable::kPartitionedFilterBlockPrefix =
|
|
"partitionedfilter.";
|
|
} // namespace ROCKSDB_NAMESPACE
|