49a10feb21
Summary: In FilePrefetchBuffer if reads are sequential, after prefetching call ReadAsync API to prefetch data asynchronously so that in next prefetching data will be available. Data prefetched asynchronously will be readahead_size/2. It uses two buffers, one for synchronous prefetching and one for asynchronous. In case, the data is overlapping, the data is copied from both buffers to third buffer to make it continuous. This feature is under ReadOptions::async_io and is under experimental. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9674 Test Plan: 1. Add new unit tests 2. Run **db_stress** to make sure nothing crashes. - Normal prefetch without `async_io` ran successfully: ``` export CRASH_TEST_EXT_ARGS=" --async_io=0" make crash_test -j ``` 3. **Run Regressions**. i) Main branch without any change for normal prefetching with async_io disabled: ``` ./db_bench -db=/tmp/prefix_scan_prefetch_main -benchmarks="fillseq" -key_size=32 -value_size=512 -num=5000000 - use_direct_io_for_flush_and_compaction=true -target_file_size_base=16777216 ``` ``` ./db_bench -use_existing_db=true -db=/tmp/prefix_scan_prefetch_main -benchmarks="seekrandom" -key_size=32 -value_size=512 -num=5000000 -use_direct_reads=true -seek_nexts=327680 -duration=120 -ops_between_duration_checks=1 Initializing RocksDB Options from the specified file Initializing RocksDB Options from command-line flags RocksDB: version 7.0 Date: Thu Mar 17 13:11:34 2022 CPU: 24 * Intel Core Processor (Broadwell) CPUCache: 16384 KB Keys: 32 bytes each (+ 0 bytes user-defined timestamp) Values: 512 bytes each (256 bytes after compression) Entries: 5000000 Prefix: 0 bytes Keys per prefix: 0 RawSize: 2594.0 MB (estimated) FileSize: 1373.3 MB (estimated) Write rate: 0 bytes/second Read rate: 0 ops/second Compression: Snappy Compression sampling rate: 0 Memtablerep: SkipListFactory Perf Level: 1 ------------------------------------------------ DB path: [/tmp/prefix_scan_prefetch_main] seekrandom : 483618.390 micros/op 2 ops/sec; 338.9 MB/s (249 of 249 found) ``` ii) normal prefetching after changes with async_io disable: ``` ./db_bench -use_existing_db=true -db=/tmp/prefix_scan_prefetch_withchange -benchmarks="seekrandom" -key_size=32 -value_size=512 -num=5000000 -use_direct_reads=true -seek_nexts=327680 -duration=120 -ops_between_duration_checks=1 Initializing RocksDB Options from the specified file Initializing RocksDB Options from command-line flags RocksDB: version 7.0 Date: Thu Mar 17 14:11:31 2022 CPU: 24 * Intel Core Processor (Broadwell) CPUCache: 16384 KB Keys: 32 bytes each (+ 0 bytes user-defined timestamp) Values: 512 bytes each (256 bytes after compression) Entries: 5000000 Prefix: 0 bytes Keys per prefix: 0 RawSize: 2594.0 MB (estimated) FileSize: 1373.3 MB (estimated) Write rate: 0 bytes/second Read rate: 0 ops/second Compression: Snappy Compression sampling rate: 0 Memtablerep: SkipListFactory Perf Level: 1 ------------------------------------------------ DB path: [/tmp/prefix_scan_prefetch_withchange] seekrandom : 471347.227 micros/op 2 ops/sec; 348.1 MB/s (255 of 255 found) ``` Reviewed By: anand1976 Differential Revision: D34731543 Pulled By: akankshamahajan15 fbshipit-source-id: 8e23aa93453d5fe3c672b9231ad582f60207937f
697 lines
29 KiB
C++
697 lines
29 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 "rocksdb/options.h"
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#include <cinttypes>
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#include <limits>
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#include "logging/logging.h"
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#include "monitoring/statistics.h"
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#include "options/db_options.h"
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#include "options/options_helper.h"
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#include "rocksdb/cache.h"
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#include "rocksdb/compaction_filter.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/memtablerep.h"
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#include "rocksdb/merge_operator.h"
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#include "rocksdb/slice.h"
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#include "rocksdb/slice_transform.h"
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#include "rocksdb/sst_file_manager.h"
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#include "rocksdb/sst_partitioner.h"
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#include "rocksdb/table.h"
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#include "rocksdb/table_properties.h"
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#include "rocksdb/wal_filter.h"
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#include "table/block_based/block_based_table_factory.h"
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#include "util/compression.h"
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namespace ROCKSDB_NAMESPACE {
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AdvancedColumnFamilyOptions::AdvancedColumnFamilyOptions() {
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assert(memtable_factory.get() != nullptr);
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}
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AdvancedColumnFamilyOptions::AdvancedColumnFamilyOptions(const Options& options)
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: max_write_buffer_number(options.max_write_buffer_number),
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min_write_buffer_number_to_merge(
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options.min_write_buffer_number_to_merge),
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max_write_buffer_number_to_maintain(
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options.max_write_buffer_number_to_maintain),
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max_write_buffer_size_to_maintain(
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options.max_write_buffer_size_to_maintain),
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inplace_update_support(options.inplace_update_support),
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inplace_update_num_locks(options.inplace_update_num_locks),
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inplace_callback(options.inplace_callback),
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memtable_prefix_bloom_size_ratio(
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options.memtable_prefix_bloom_size_ratio),
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memtable_whole_key_filtering(options.memtable_whole_key_filtering),
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memtable_huge_page_size(options.memtable_huge_page_size),
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memtable_insert_with_hint_prefix_extractor(
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options.memtable_insert_with_hint_prefix_extractor),
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bloom_locality(options.bloom_locality),
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arena_block_size(options.arena_block_size),
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compression_per_level(options.compression_per_level),
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num_levels(options.num_levels),
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level0_slowdown_writes_trigger(options.level0_slowdown_writes_trigger),
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level0_stop_writes_trigger(options.level0_stop_writes_trigger),
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target_file_size_base(options.target_file_size_base),
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target_file_size_multiplier(options.target_file_size_multiplier),
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level_compaction_dynamic_level_bytes(
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options.level_compaction_dynamic_level_bytes),
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max_bytes_for_level_multiplier(options.max_bytes_for_level_multiplier),
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max_bytes_for_level_multiplier_additional(
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options.max_bytes_for_level_multiplier_additional),
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max_compaction_bytes(options.max_compaction_bytes),
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soft_pending_compaction_bytes_limit(
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options.soft_pending_compaction_bytes_limit),
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hard_pending_compaction_bytes_limit(
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options.hard_pending_compaction_bytes_limit),
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compaction_style(options.compaction_style),
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compaction_pri(options.compaction_pri),
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compaction_options_universal(options.compaction_options_universal),
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compaction_options_fifo(options.compaction_options_fifo),
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max_sequential_skip_in_iterations(
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options.max_sequential_skip_in_iterations),
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memtable_factory(options.memtable_factory),
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table_properties_collector_factories(
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options.table_properties_collector_factories),
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max_successive_merges(options.max_successive_merges),
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optimize_filters_for_hits(options.optimize_filters_for_hits),
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paranoid_file_checks(options.paranoid_file_checks),
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force_consistency_checks(options.force_consistency_checks),
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report_bg_io_stats(options.report_bg_io_stats),
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ttl(options.ttl),
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periodic_compaction_seconds(options.periodic_compaction_seconds),
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sample_for_compression(options.sample_for_compression),
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enable_blob_files(options.enable_blob_files),
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min_blob_size(options.min_blob_size),
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blob_file_size(options.blob_file_size),
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blob_compression_type(options.blob_compression_type),
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enable_blob_garbage_collection(options.enable_blob_garbage_collection),
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blob_garbage_collection_age_cutoff(
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options.blob_garbage_collection_age_cutoff),
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blob_garbage_collection_force_threshold(
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options.blob_garbage_collection_force_threshold),
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blob_compaction_readahead_size(options.blob_compaction_readahead_size) {
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assert(memtable_factory.get() != nullptr);
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if (max_bytes_for_level_multiplier_additional.size() <
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static_cast<unsigned int>(num_levels)) {
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max_bytes_for_level_multiplier_additional.resize(num_levels, 1);
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}
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}
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ColumnFamilyOptions::ColumnFamilyOptions()
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: compression(Snappy_Supported() ? kSnappyCompression : kNoCompression),
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table_factory(
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std::shared_ptr<TableFactory>(new BlockBasedTableFactory())) {}
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ColumnFamilyOptions::ColumnFamilyOptions(const Options& options)
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: ColumnFamilyOptions(*static_cast<const ColumnFamilyOptions*>(&options)) {}
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DBOptions::DBOptions() {}
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DBOptions::DBOptions(const Options& options)
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: DBOptions(*static_cast<const DBOptions*>(&options)) {}
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void DBOptions::Dump(Logger* log) const {
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ImmutableDBOptions(*this).Dump(log);
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MutableDBOptions(*this).Dump(log);
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} // DBOptions::Dump
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void ColumnFamilyOptions::Dump(Logger* log) const {
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ROCKS_LOG_HEADER(log, " Options.comparator: %s",
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comparator->Name());
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ROCKS_LOG_HEADER(log, " Options.merge_operator: %s",
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merge_operator ? merge_operator->Name() : "None");
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ROCKS_LOG_HEADER(log, " Options.compaction_filter: %s",
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compaction_filter ? compaction_filter->Name() : "None");
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ROCKS_LOG_HEADER(
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log, " Options.compaction_filter_factory: %s",
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compaction_filter_factory ? compaction_filter_factory->Name() : "None");
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ROCKS_LOG_HEADER(
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log, " Options.sst_partitioner_factory: %s",
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sst_partitioner_factory ? sst_partitioner_factory->Name() : "None");
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ROCKS_LOG_HEADER(log, " Options.memtable_factory: %s",
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memtable_factory->Name());
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ROCKS_LOG_HEADER(log, " Options.table_factory: %s",
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table_factory->Name());
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ROCKS_LOG_HEADER(log, " table_factory options: %s",
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table_factory->GetPrintableOptions().c_str());
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ROCKS_LOG_HEADER(log, " Options.write_buffer_size: %" ROCKSDB_PRIszt,
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write_buffer_size);
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ROCKS_LOG_HEADER(log, " Options.max_write_buffer_number: %d",
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max_write_buffer_number);
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if (!compression_per_level.empty()) {
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for (unsigned int i = 0; i < compression_per_level.size(); i++) {
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ROCKS_LOG_HEADER(
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log, " Options.compression[%d]: %s", i,
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CompressionTypeToString(compression_per_level[i]).c_str());
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}
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} else {
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ROCKS_LOG_HEADER(log, " Options.compression: %s",
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CompressionTypeToString(compression).c_str());
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}
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ROCKS_LOG_HEADER(
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log, " Options.bottommost_compression: %s",
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bottommost_compression == kDisableCompressionOption
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? "Disabled"
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: CompressionTypeToString(bottommost_compression).c_str());
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ROCKS_LOG_HEADER(
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log, " Options.prefix_extractor: %s",
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prefix_extractor == nullptr ? "nullptr" : prefix_extractor->Name());
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ROCKS_LOG_HEADER(log,
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" Options.memtable_insert_with_hint_prefix_extractor: %s",
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memtable_insert_with_hint_prefix_extractor == nullptr
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? "nullptr"
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: memtable_insert_with_hint_prefix_extractor->Name());
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ROCKS_LOG_HEADER(log, " Options.num_levels: %d", num_levels);
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ROCKS_LOG_HEADER(log, " Options.min_write_buffer_number_to_merge: %d",
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min_write_buffer_number_to_merge);
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ROCKS_LOG_HEADER(log, " Options.max_write_buffer_number_to_maintain: %d",
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max_write_buffer_number_to_maintain);
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ROCKS_LOG_HEADER(log,
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" Options.max_write_buffer_size_to_maintain: %" PRIu64,
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max_write_buffer_size_to_maintain);
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ROCKS_LOG_HEADER(
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log, " Options.bottommost_compression_opts.window_bits: %d",
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bottommost_compression_opts.window_bits);
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ROCKS_LOG_HEADER(
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log, " Options.bottommost_compression_opts.level: %d",
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bottommost_compression_opts.level);
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ROCKS_LOG_HEADER(
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log, " Options.bottommost_compression_opts.strategy: %d",
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bottommost_compression_opts.strategy);
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ROCKS_LOG_HEADER(
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log,
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" Options.bottommost_compression_opts.max_dict_bytes: "
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"%" PRIu32,
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bottommost_compression_opts.max_dict_bytes);
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ROCKS_LOG_HEADER(
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log,
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" Options.bottommost_compression_opts.zstd_max_train_bytes: "
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"%" PRIu32,
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bottommost_compression_opts.zstd_max_train_bytes);
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ROCKS_LOG_HEADER(
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log,
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" Options.bottommost_compression_opts.parallel_threads: "
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"%" PRIu32,
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bottommost_compression_opts.parallel_threads);
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ROCKS_LOG_HEADER(
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log, " Options.bottommost_compression_opts.enabled: %s",
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bottommost_compression_opts.enabled ? "true" : "false");
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ROCKS_LOG_HEADER(
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log,
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" Options.bottommost_compression_opts.max_dict_buffer_bytes: "
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"%" PRIu64,
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bottommost_compression_opts.max_dict_buffer_bytes);
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ROCKS_LOG_HEADER(log, " Options.compression_opts.window_bits: %d",
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compression_opts.window_bits);
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ROCKS_LOG_HEADER(log, " Options.compression_opts.level: %d",
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compression_opts.level);
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ROCKS_LOG_HEADER(log, " Options.compression_opts.strategy: %d",
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compression_opts.strategy);
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ROCKS_LOG_HEADER(
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log,
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" Options.compression_opts.max_dict_bytes: %" PRIu32,
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compression_opts.max_dict_bytes);
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ROCKS_LOG_HEADER(log,
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" Options.compression_opts.zstd_max_train_bytes: "
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"%" PRIu32,
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compression_opts.zstd_max_train_bytes);
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ROCKS_LOG_HEADER(log,
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" Options.compression_opts.parallel_threads: "
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"%" PRIu32,
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compression_opts.parallel_threads);
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ROCKS_LOG_HEADER(log,
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" Options.compression_opts.enabled: %s",
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compression_opts.enabled ? "true" : "false");
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ROCKS_LOG_HEADER(log,
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" Options.compression_opts.max_dict_buffer_bytes: "
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"%" PRIu64,
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compression_opts.max_dict_buffer_bytes);
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ROCKS_LOG_HEADER(log, " Options.level0_file_num_compaction_trigger: %d",
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level0_file_num_compaction_trigger);
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ROCKS_LOG_HEADER(log, " Options.level0_slowdown_writes_trigger: %d",
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level0_slowdown_writes_trigger);
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ROCKS_LOG_HEADER(log, " Options.level0_stop_writes_trigger: %d",
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level0_stop_writes_trigger);
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ROCKS_LOG_HEADER(
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log, " Options.target_file_size_base: %" PRIu64,
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target_file_size_base);
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ROCKS_LOG_HEADER(log, " Options.target_file_size_multiplier: %d",
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target_file_size_multiplier);
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ROCKS_LOG_HEADER(
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log, " Options.max_bytes_for_level_base: %" PRIu64,
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max_bytes_for_level_base);
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ROCKS_LOG_HEADER(log, "Options.level_compaction_dynamic_level_bytes: %d",
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level_compaction_dynamic_level_bytes);
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ROCKS_LOG_HEADER(log, " Options.max_bytes_for_level_multiplier: %f",
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max_bytes_for_level_multiplier);
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for (size_t i = 0; i < max_bytes_for_level_multiplier_additional.size();
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i++) {
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ROCKS_LOG_HEADER(
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log, "Options.max_bytes_for_level_multiplier_addtl[%" ROCKSDB_PRIszt
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"]: %d",
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i, max_bytes_for_level_multiplier_additional[i]);
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}
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ROCKS_LOG_HEADER(
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log, " Options.max_sequential_skip_in_iterations: %" PRIu64,
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max_sequential_skip_in_iterations);
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ROCKS_LOG_HEADER(
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log, " Options.max_compaction_bytes: %" PRIu64,
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max_compaction_bytes);
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ROCKS_LOG_HEADER(
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log,
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" Options.arena_block_size: %" ROCKSDB_PRIszt,
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arena_block_size);
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ROCKS_LOG_HEADER(log,
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" Options.soft_pending_compaction_bytes_limit: %" PRIu64,
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soft_pending_compaction_bytes_limit);
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ROCKS_LOG_HEADER(log,
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" Options.hard_pending_compaction_bytes_limit: %" PRIu64,
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hard_pending_compaction_bytes_limit);
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ROCKS_LOG_HEADER(log, " Options.disable_auto_compactions: %d",
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disable_auto_compactions);
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const auto& it_compaction_style =
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compaction_style_to_string.find(compaction_style);
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std::string str_compaction_style;
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if (it_compaction_style == compaction_style_to_string.end()) {
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assert(false);
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str_compaction_style = "unknown_" + std::to_string(compaction_style);
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} else {
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str_compaction_style = it_compaction_style->second;
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}
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ROCKS_LOG_HEADER(log,
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" Options.compaction_style: %s",
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str_compaction_style.c_str());
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const auto& it_compaction_pri =
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compaction_pri_to_string.find(compaction_pri);
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std::string str_compaction_pri;
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if (it_compaction_pri == compaction_pri_to_string.end()) {
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assert(false);
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str_compaction_pri = "unknown_" + std::to_string(compaction_pri);
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} else {
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str_compaction_pri = it_compaction_pri->second;
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}
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ROCKS_LOG_HEADER(log,
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" Options.compaction_pri: %s",
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str_compaction_pri.c_str());
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ROCKS_LOG_HEADER(log,
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"Options.compaction_options_universal.size_ratio: %u",
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compaction_options_universal.size_ratio);
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ROCKS_LOG_HEADER(log,
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"Options.compaction_options_universal.min_merge_width: %u",
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compaction_options_universal.min_merge_width);
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ROCKS_LOG_HEADER(log,
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"Options.compaction_options_universal.max_merge_width: %u",
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compaction_options_universal.max_merge_width);
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ROCKS_LOG_HEADER(
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log,
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"Options.compaction_options_universal."
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"max_size_amplification_percent: %u",
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compaction_options_universal.max_size_amplification_percent);
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ROCKS_LOG_HEADER(
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log,
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"Options.compaction_options_universal.compression_size_percent: %d",
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compaction_options_universal.compression_size_percent);
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const auto& it_compaction_stop_style = compaction_stop_style_to_string.find(
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compaction_options_universal.stop_style);
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std::string str_compaction_stop_style;
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if (it_compaction_stop_style == compaction_stop_style_to_string.end()) {
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assert(false);
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str_compaction_stop_style =
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"unknown_" + std::to_string(compaction_options_universal.stop_style);
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} else {
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str_compaction_stop_style = it_compaction_stop_style->second;
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}
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ROCKS_LOG_HEADER(log,
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"Options.compaction_options_universal.stop_style: %s",
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str_compaction_stop_style.c_str());
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ROCKS_LOG_HEADER(
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log, "Options.compaction_options_fifo.max_table_files_size: %" PRIu64,
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compaction_options_fifo.max_table_files_size);
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ROCKS_LOG_HEADER(log,
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"Options.compaction_options_fifo.allow_compaction: %d",
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compaction_options_fifo.allow_compaction);
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std::ostringstream collector_info;
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for (const auto& collector_factory : table_properties_collector_factories) {
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collector_info << collector_factory->ToString() << ';';
|
|
}
|
|
ROCKS_LOG_HEADER(
|
|
log, " Options.table_properties_collectors: %s",
|
|
collector_info.str().c_str());
|
|
ROCKS_LOG_HEADER(log,
|
|
" Options.inplace_update_support: %d",
|
|
inplace_update_support);
|
|
ROCKS_LOG_HEADER(
|
|
log,
|
|
" Options.inplace_update_num_locks: %" ROCKSDB_PRIszt,
|
|
inplace_update_num_locks);
|
|
// TODO: easier config for bloom (maybe based on avg key/value size)
|
|
ROCKS_LOG_HEADER(
|
|
log, " Options.memtable_prefix_bloom_size_ratio: %f",
|
|
memtable_prefix_bloom_size_ratio);
|
|
ROCKS_LOG_HEADER(log,
|
|
" Options.memtable_whole_key_filtering: %d",
|
|
memtable_whole_key_filtering);
|
|
|
|
ROCKS_LOG_HEADER(log, " Options.memtable_huge_page_size: %" ROCKSDB_PRIszt,
|
|
memtable_huge_page_size);
|
|
ROCKS_LOG_HEADER(log,
|
|
" Options.bloom_locality: %d",
|
|
bloom_locality);
|
|
|
|
ROCKS_LOG_HEADER(
|
|
log,
|
|
" Options.max_successive_merges: %" ROCKSDB_PRIszt,
|
|
max_successive_merges);
|
|
ROCKS_LOG_HEADER(log,
|
|
" Options.optimize_filters_for_hits: %d",
|
|
optimize_filters_for_hits);
|
|
ROCKS_LOG_HEADER(log, " Options.paranoid_file_checks: %d",
|
|
paranoid_file_checks);
|
|
ROCKS_LOG_HEADER(log, " Options.force_consistency_checks: %d",
|
|
force_consistency_checks);
|
|
ROCKS_LOG_HEADER(log, " Options.report_bg_io_stats: %d",
|
|
report_bg_io_stats);
|
|
ROCKS_LOG_HEADER(log, " Options.ttl: %" PRIu64,
|
|
ttl);
|
|
ROCKS_LOG_HEADER(log,
|
|
" Options.periodic_compaction_seconds: %" PRIu64,
|
|
periodic_compaction_seconds);
|
|
ROCKS_LOG_HEADER(log, " Options.enable_blob_files: %s",
|
|
enable_blob_files ? "true" : "false");
|
|
ROCKS_LOG_HEADER(
|
|
log, " Options.min_blob_size: %" PRIu64,
|
|
min_blob_size);
|
|
ROCKS_LOG_HEADER(
|
|
log, " Options.blob_file_size: %" PRIu64,
|
|
blob_file_size);
|
|
ROCKS_LOG_HEADER(log, " Options.blob_compression_type: %s",
|
|
CompressionTypeToString(blob_compression_type).c_str());
|
|
ROCKS_LOG_HEADER(log, " Options.enable_blob_garbage_collection: %s",
|
|
enable_blob_garbage_collection ? "true" : "false");
|
|
ROCKS_LOG_HEADER(log, " Options.blob_garbage_collection_age_cutoff: %f",
|
|
blob_garbage_collection_age_cutoff);
|
|
ROCKS_LOG_HEADER(log, "Options.blob_garbage_collection_force_threshold: %f",
|
|
blob_garbage_collection_force_threshold);
|
|
ROCKS_LOG_HEADER(
|
|
log, " Options.blob_compaction_readahead_size: %" PRIu64,
|
|
blob_compaction_readahead_size);
|
|
} // ColumnFamilyOptions::Dump
|
|
|
|
void Options::Dump(Logger* log) const {
|
|
DBOptions::Dump(log);
|
|
ColumnFamilyOptions::Dump(log);
|
|
} // Options::Dump
|
|
|
|
void Options::DumpCFOptions(Logger* log) const {
|
|
ColumnFamilyOptions::Dump(log);
|
|
} // Options::DumpCFOptions
|
|
|
|
//
|
|
// The goal of this method is to create a configuration that
|
|
// allows an application to write all files into L0 and
|
|
// then do a single compaction to output all files into L1.
|
|
Options*
|
|
Options::PrepareForBulkLoad()
|
|
{
|
|
// never slowdown ingest.
|
|
level0_file_num_compaction_trigger = (1<<30);
|
|
level0_slowdown_writes_trigger = (1<<30);
|
|
level0_stop_writes_trigger = (1<<30);
|
|
soft_pending_compaction_bytes_limit = 0;
|
|
hard_pending_compaction_bytes_limit = 0;
|
|
|
|
// no auto compactions please. The application should issue a
|
|
// manual compaction after all data is loaded into L0.
|
|
disable_auto_compactions = true;
|
|
// A manual compaction run should pick all files in L0 in
|
|
// a single compaction run.
|
|
max_compaction_bytes = (static_cast<uint64_t>(1) << 60);
|
|
|
|
// It is better to have only 2 levels, otherwise a manual
|
|
// compaction would compact at every possible level, thereby
|
|
// increasing the total time needed for compactions.
|
|
num_levels = 2;
|
|
|
|
// Need to allow more write buffers to allow more parallism
|
|
// of flushes.
|
|
max_write_buffer_number = 6;
|
|
min_write_buffer_number_to_merge = 1;
|
|
|
|
// When compaction is disabled, more parallel flush threads can
|
|
// help with write throughput.
|
|
max_background_flushes = 4;
|
|
|
|
// Prevent a memtable flush to automatically promote files
|
|
// to L1. This is helpful so that all files that are
|
|
// input to the manual compaction are all at L0.
|
|
max_background_compactions = 2;
|
|
|
|
// The compaction would create large files in L1.
|
|
target_file_size_base = 256 * 1024 * 1024;
|
|
return this;
|
|
}
|
|
|
|
Options* Options::OptimizeForSmallDb() {
|
|
// 16MB block cache
|
|
std::shared_ptr<Cache> cache = NewLRUCache(16 << 20);
|
|
|
|
ColumnFamilyOptions::OptimizeForSmallDb(&cache);
|
|
DBOptions::OptimizeForSmallDb(&cache);
|
|
return this;
|
|
}
|
|
|
|
Options* Options::DisableExtraChecks() {
|
|
// See https://github.com/facebook/rocksdb/issues/9354
|
|
force_consistency_checks = false;
|
|
// Considered but no clear performance impact seen:
|
|
// * check_flush_compaction_key_order
|
|
// * paranoid_checks
|
|
// * flush_verify_memtable_count
|
|
// By current API contract, not including
|
|
// * verify_checksums
|
|
// because checking storage data integrity is a more standard practice.
|
|
return this;
|
|
}
|
|
|
|
Options* Options::OldDefaults(int rocksdb_major_version,
|
|
int rocksdb_minor_version) {
|
|
ColumnFamilyOptions::OldDefaults(rocksdb_major_version,
|
|
rocksdb_minor_version);
|
|
DBOptions::OldDefaults(rocksdb_major_version, rocksdb_minor_version);
|
|
return this;
|
|
}
|
|
|
|
DBOptions* DBOptions::OldDefaults(int rocksdb_major_version,
|
|
int rocksdb_minor_version) {
|
|
if (rocksdb_major_version < 4 ||
|
|
(rocksdb_major_version == 4 && rocksdb_minor_version < 7)) {
|
|
max_file_opening_threads = 1;
|
|
table_cache_numshardbits = 4;
|
|
}
|
|
if (rocksdb_major_version < 5 ||
|
|
(rocksdb_major_version == 5 && rocksdb_minor_version < 2)) {
|
|
delayed_write_rate = 2 * 1024U * 1024U;
|
|
} else if (rocksdb_major_version < 5 ||
|
|
(rocksdb_major_version == 5 && rocksdb_minor_version < 6)) {
|
|
delayed_write_rate = 16 * 1024U * 1024U;
|
|
}
|
|
max_open_files = 5000;
|
|
wal_recovery_mode = WALRecoveryMode::kTolerateCorruptedTailRecords;
|
|
return this;
|
|
}
|
|
|
|
ColumnFamilyOptions* ColumnFamilyOptions::OldDefaults(
|
|
int rocksdb_major_version, int rocksdb_minor_version) {
|
|
if (rocksdb_major_version < 5 ||
|
|
(rocksdb_major_version == 5 && rocksdb_minor_version <= 18)) {
|
|
compaction_pri = CompactionPri::kByCompensatedSize;
|
|
}
|
|
if (rocksdb_major_version < 4 ||
|
|
(rocksdb_major_version == 4 && rocksdb_minor_version < 7)) {
|
|
write_buffer_size = 4 << 20;
|
|
target_file_size_base = 2 * 1048576;
|
|
max_bytes_for_level_base = 10 * 1048576;
|
|
soft_pending_compaction_bytes_limit = 0;
|
|
hard_pending_compaction_bytes_limit = 0;
|
|
}
|
|
if (rocksdb_major_version < 5) {
|
|
level0_stop_writes_trigger = 24;
|
|
} else if (rocksdb_major_version == 5 && rocksdb_minor_version < 2) {
|
|
level0_stop_writes_trigger = 30;
|
|
}
|
|
|
|
return this;
|
|
}
|
|
|
|
// Optimization functions
|
|
DBOptions* DBOptions::OptimizeForSmallDb(std::shared_ptr<Cache>* cache) {
|
|
max_file_opening_threads = 1;
|
|
max_open_files = 5000;
|
|
|
|
// Cost memtable to block cache too.
|
|
std::shared_ptr<ROCKSDB_NAMESPACE::WriteBufferManager> wbm =
|
|
std::make_shared<ROCKSDB_NAMESPACE::WriteBufferManager>(
|
|
0, (cache != nullptr) ? *cache : std::shared_ptr<Cache>());
|
|
write_buffer_manager = wbm;
|
|
|
|
return this;
|
|
}
|
|
|
|
ColumnFamilyOptions* ColumnFamilyOptions::OptimizeForSmallDb(
|
|
std::shared_ptr<Cache>* cache) {
|
|
write_buffer_size = 2 << 20;
|
|
target_file_size_base = 2 * 1048576;
|
|
max_bytes_for_level_base = 10 * 1048576;
|
|
soft_pending_compaction_bytes_limit = 256 * 1048576;
|
|
hard_pending_compaction_bytes_limit = 1073741824ul;
|
|
|
|
BlockBasedTableOptions table_options;
|
|
table_options.block_cache =
|
|
(cache != nullptr) ? *cache : std::shared_ptr<Cache>();
|
|
table_options.cache_index_and_filter_blocks = true;
|
|
// Two level iterator to avoid LRU cache imbalance
|
|
table_options.index_type =
|
|
BlockBasedTableOptions::IndexType::kTwoLevelIndexSearch;
|
|
table_factory.reset(new BlockBasedTableFactory(table_options));
|
|
|
|
return this;
|
|
}
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
ColumnFamilyOptions* ColumnFamilyOptions::OptimizeForPointLookup(
|
|
uint64_t block_cache_size_mb) {
|
|
BlockBasedTableOptions block_based_options;
|
|
block_based_options.data_block_index_type =
|
|
BlockBasedTableOptions::kDataBlockBinaryAndHash;
|
|
block_based_options.data_block_hash_table_util_ratio = 0.75;
|
|
block_based_options.filter_policy.reset(NewBloomFilterPolicy(10));
|
|
block_based_options.block_cache =
|
|
NewLRUCache(static_cast<size_t>(block_cache_size_mb * 1024 * 1024));
|
|
table_factory.reset(new BlockBasedTableFactory(block_based_options));
|
|
memtable_prefix_bloom_size_ratio = 0.02;
|
|
memtable_whole_key_filtering = true;
|
|
return this;
|
|
}
|
|
|
|
ColumnFamilyOptions* ColumnFamilyOptions::OptimizeLevelStyleCompaction(
|
|
uint64_t memtable_memory_budget) {
|
|
write_buffer_size = static_cast<size_t>(memtable_memory_budget / 4);
|
|
// merge two memtables when flushing to L0
|
|
min_write_buffer_number_to_merge = 2;
|
|
// this means we'll use 50% extra memory in the worst case, but will reduce
|
|
// write stalls.
|
|
max_write_buffer_number = 6;
|
|
// start flushing L0->L1 as soon as possible. each file on level0 is
|
|
// (memtable_memory_budget / 2). This will flush level 0 when it's bigger than
|
|
// memtable_memory_budget.
|
|
level0_file_num_compaction_trigger = 2;
|
|
// doesn't really matter much, but we don't want to create too many files
|
|
target_file_size_base = memtable_memory_budget / 8;
|
|
// make Level1 size equal to Level0 size, so that L0->L1 compactions are fast
|
|
max_bytes_for_level_base = memtable_memory_budget;
|
|
|
|
// level style compaction
|
|
compaction_style = kCompactionStyleLevel;
|
|
|
|
// only compress levels >= 2
|
|
compression_per_level.resize(num_levels);
|
|
for (int i = 0; i < num_levels; ++i) {
|
|
if (i < 2) {
|
|
compression_per_level[i] = kNoCompression;
|
|
} else {
|
|
compression_per_level[i] =
|
|
LZ4_Supported()
|
|
? kLZ4Compression
|
|
: (Snappy_Supported() ? kSnappyCompression : kNoCompression);
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
|
|
ColumnFamilyOptions* ColumnFamilyOptions::OptimizeUniversalStyleCompaction(
|
|
uint64_t memtable_memory_budget) {
|
|
write_buffer_size = static_cast<size_t>(memtable_memory_budget / 4);
|
|
// merge two memtables when flushing to L0
|
|
min_write_buffer_number_to_merge = 2;
|
|
// this means we'll use 50% extra memory in the worst case, but will reduce
|
|
// write stalls.
|
|
max_write_buffer_number = 6;
|
|
// universal style compaction
|
|
compaction_style = kCompactionStyleUniversal;
|
|
compaction_options_universal.compression_size_percent = 80;
|
|
return this;
|
|
}
|
|
|
|
DBOptions* DBOptions::IncreaseParallelism(int total_threads) {
|
|
max_background_jobs = total_threads;
|
|
env->SetBackgroundThreads(total_threads, Env::LOW);
|
|
env->SetBackgroundThreads(1, Env::HIGH);
|
|
return this;
|
|
}
|
|
|
|
#endif // !ROCKSDB_LITE
|
|
|
|
ReadOptions::ReadOptions()
|
|
: snapshot(nullptr),
|
|
iterate_lower_bound(nullptr),
|
|
iterate_upper_bound(nullptr),
|
|
readahead_size(0),
|
|
max_skippable_internal_keys(0),
|
|
read_tier(kReadAllTier),
|
|
verify_checksums(true),
|
|
fill_cache(true),
|
|
tailing(false),
|
|
managed(false),
|
|
total_order_seek(false),
|
|
auto_prefix_mode(false),
|
|
prefix_same_as_start(false),
|
|
pin_data(false),
|
|
background_purge_on_iterator_cleanup(false),
|
|
ignore_range_deletions(false),
|
|
timestamp(nullptr),
|
|
iter_start_ts(nullptr),
|
|
deadline(std::chrono::microseconds::zero()),
|
|
io_timeout(std::chrono::microseconds::zero()),
|
|
value_size_soft_limit(std::numeric_limits<uint64_t>::max()),
|
|
adaptive_readahead(false),
|
|
async_io(false) {}
|
|
|
|
ReadOptions::ReadOptions(bool cksum, bool cache)
|
|
: snapshot(nullptr),
|
|
iterate_lower_bound(nullptr),
|
|
iterate_upper_bound(nullptr),
|
|
readahead_size(0),
|
|
max_skippable_internal_keys(0),
|
|
read_tier(kReadAllTier),
|
|
verify_checksums(cksum),
|
|
fill_cache(cache),
|
|
tailing(false),
|
|
managed(false),
|
|
total_order_seek(false),
|
|
auto_prefix_mode(false),
|
|
prefix_same_as_start(false),
|
|
pin_data(false),
|
|
background_purge_on_iterator_cleanup(false),
|
|
ignore_range_deletions(false),
|
|
timestamp(nullptr),
|
|
iter_start_ts(nullptr),
|
|
deadline(std::chrono::microseconds::zero()),
|
|
io_timeout(std::chrono::microseconds::zero()),
|
|
value_size_soft_limit(std::numeric_limits<uint64_t>::max()),
|
|
adaptive_readahead(false),
|
|
async_io(false) {}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|