caf0f53a74
Summary: Given that index value is a BlockHandle, which is basically an <offset, size> pair we can apply delta encoding on the values. The first value at each index restart interval encoded the full BlockHandle but the rest encode only the size. Refer to IndexBlockIter::DecodeCurrentValue for the detail of the encoding. This reduces the index size which helps using the block cache more efficiently. The feature is enabled with using format_version 4. The feature comes with a bit of cpu overhead which should be paid back by the higher cache hits due to smaller index block size. Results with sysbench read-only using 4k blocks and using 16 index restart interval: Format 2: 19585 rocksdb read-only range=100 Format 3: 19569 rocksdb read-only range=100 Format 4: 19352 rocksdb read-only range=100 Pull Request resolved: https://github.com/facebook/rocksdb/pull/3983 Differential Revision: D8361343 Pulled By: maysamyabandeh fbshipit-source-id: f882ee082322acac32b0072e2bdbb0b5f854e651
85 lines
3.6 KiB
C++
85 lines
3.6 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
#pragma once
|
|
#include <string>
|
|
#include <utility>
|
|
#include <vector>
|
|
#include "db/table_properties_collector.h"
|
|
#include "options/cf_options.h"
|
|
#include "rocksdb/comparator.h"
|
|
#include "rocksdb/env.h"
|
|
#include "rocksdb/listener.h"
|
|
#include "rocksdb/options.h"
|
|
#include "rocksdb/status.h"
|
|
#include "rocksdb/table_properties.h"
|
|
#include "rocksdb/types.h"
|
|
#include "table/scoped_arena_iterator.h"
|
|
#include "util/event_logger.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
struct Options;
|
|
struct FileMetaData;
|
|
|
|
class Env;
|
|
struct EnvOptions;
|
|
class Iterator;
|
|
class SnapshotChecker;
|
|
class TableCache;
|
|
class VersionEdit;
|
|
class TableBuilder;
|
|
class WritableFileWriter;
|
|
class InternalStats;
|
|
|
|
// @param column_family_name Name of the column family that is also identified
|
|
// by column_family_id, or empty string if unknown. It must outlive the
|
|
// TableBuilder returned by this function.
|
|
// @param compression_dict Data for presetting the compression library's
|
|
// dictionary, or nullptr.
|
|
TableBuilder* NewTableBuilder(
|
|
const ImmutableCFOptions& options, const MutableCFOptions& moptions,
|
|
const InternalKeyComparator& internal_comparator,
|
|
const std::vector<std::unique_ptr<IntTblPropCollectorFactory>>*
|
|
int_tbl_prop_collector_factories,
|
|
uint32_t column_family_id, const std::string& column_family_name,
|
|
WritableFileWriter* file, const CompressionType compression_type,
|
|
const CompressionOptions& compression_opts, int level,
|
|
const std::string* compression_dict = nullptr,
|
|
const bool skip_filters = false, const uint64_t creation_time = 0,
|
|
const uint64_t oldest_key_time = 0);
|
|
|
|
// Build a Table file from the contents of *iter. The generated file
|
|
// will be named according to number specified in meta. On success, the rest of
|
|
// *meta will be filled with metadata about the generated table.
|
|
// If no data is present in *iter, meta->file_size will be set to
|
|
// zero, and no Table file will be produced.
|
|
//
|
|
// @param column_family_name Name of the column family that is also identified
|
|
// by column_family_id, or empty string if unknown.
|
|
extern Status BuildTable(
|
|
const std::string& dbname, Env* env, const ImmutableCFOptions& options,
|
|
const MutableCFOptions& mutable_cf_options, const EnvOptions& env_options,
|
|
TableCache* table_cache, InternalIterator* iter,
|
|
std::unique_ptr<InternalIterator> range_del_iter, FileMetaData* meta,
|
|
const InternalKeyComparator& internal_comparator,
|
|
const std::vector<std::unique_ptr<IntTblPropCollectorFactory>>*
|
|
int_tbl_prop_collector_factories,
|
|
uint32_t column_family_id, const std::string& column_family_name,
|
|
std::vector<SequenceNumber> snapshots,
|
|
SequenceNumber earliest_write_conflict_snapshot,
|
|
SnapshotChecker* snapshot_checker, const CompressionType compression,
|
|
const CompressionOptions& compression_opts, bool paranoid_file_checks,
|
|
InternalStats* internal_stats, TableFileCreationReason reason,
|
|
EventLogger* event_logger = nullptr, int job_id = 0,
|
|
const Env::IOPriority io_priority = Env::IO_HIGH,
|
|
TableProperties* table_properties = nullptr, int level = -1,
|
|
const uint64_t creation_time = 0, const uint64_t oldest_key_time = 0,
|
|
Env::WriteLifeTimeHint write_hint = Env::WLTH_NOT_SET);
|
|
|
|
} // namespace rocksdb
|