b45b1cde3e
Summary: This is a feature to sample data-block compressibility and and report them as stats. 1 in N (tunable) blocks is sampled for compressibility using two algorithms: 1. lz4 or snappy for fast compression 2. zstd or zlib for slow but higher compression. The stats are reported to the caller as raw-bytes and compressed-bytes. The block continues to be compressed for storage using the specified CompressionType. The db_bench_tool how has a command line option for specifying the sampling rate. It's default value is 0 (no sampling). To test the overhead for a certain value, users can compare the performance of db_bench_tool, varying the sampling rate. It is unlikely to have a noticeable impact for high values like 20. Pull Request resolved: https://github.com/facebook/rocksdb/pull/4842 Differential Revision: D13629011 Pulled By: shobhitdayal fbshipit-source-id: 14ca668bcab6499b2a1734edf848eb62a4f4fafa
86 lines
3.7 KiB
C++
86 lines
3.7 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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// 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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#pragma once
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#include <string>
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#include <utility>
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#include <vector>
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#include "db/range_tombstone_fragmenter.h"
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#include "db/table_properties_collector.h"
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#include "options/cf_options.h"
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#include "rocksdb/comparator.h"
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#include "rocksdb/env.h"
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#include "rocksdb/listener.h"
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#include "rocksdb/options.h"
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#include "rocksdb/status.h"
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#include "rocksdb/table_properties.h"
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#include "rocksdb/types.h"
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#include "table/scoped_arena_iterator.h"
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#include "util/event_logger.h"
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namespace rocksdb {
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struct Options;
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struct FileMetaData;
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class Env;
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struct EnvOptions;
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class Iterator;
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class SnapshotChecker;
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class TableCache;
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class VersionEdit;
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class TableBuilder;
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class WritableFileWriter;
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class InternalStats;
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// @param column_family_name Name of the column family that is also identified
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// by column_family_id, or empty string if unknown. It must outlive the
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// TableBuilder returned by this function.
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TableBuilder* NewTableBuilder(
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const ImmutableCFOptions& options, const MutableCFOptions& moptions,
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const InternalKeyComparator& internal_comparator,
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const std::vector<std::unique_ptr<IntTblPropCollectorFactory>>*
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int_tbl_prop_collector_factories,
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uint32_t column_family_id, const std::string& column_family_name,
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WritableFileWriter* file, const CompressionType compression_type,
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const uint64_t sample_for_compression,
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const CompressionOptions& compression_opts, int level,
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const bool skip_filters = false, const uint64_t creation_time = 0,
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const uint64_t oldest_key_time = 0, const uint64_t target_file_size = 0);
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// Build a Table file from the contents of *iter. The generated file
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// will be named according to number specified in meta. On success, the rest of
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// *meta will be filled with metadata about the generated table.
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// If no data is present in *iter, meta->file_size will be set to
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// zero, and no Table file will be produced.
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//
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// @param column_family_name Name of the column family that is also identified
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// by column_family_id, or empty string if unknown.
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extern Status BuildTable(
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const std::string& dbname, Env* env, const ImmutableCFOptions& options,
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const MutableCFOptions& mutable_cf_options, const EnvOptions& env_options,
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TableCache* table_cache, InternalIterator* iter,
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std::vector<std::unique_ptr<FragmentedRangeTombstoneIterator>>
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range_del_iters,
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FileMetaData* meta, const InternalKeyComparator& internal_comparator,
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const std::vector<std::unique_ptr<IntTblPropCollectorFactory>>*
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int_tbl_prop_collector_factories,
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uint32_t column_family_id, const std::string& column_family_name,
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std::vector<SequenceNumber> snapshots,
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SequenceNumber earliest_write_conflict_snapshot,
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SnapshotChecker* snapshot_checker, const CompressionType compression,
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const uint64_t sample_for_compression,
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const CompressionOptions& compression_opts, bool paranoid_file_checks,
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InternalStats* internal_stats, TableFileCreationReason reason,
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EventLogger* event_logger = nullptr, int job_id = 0,
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const Env::IOPriority io_priority = Env::IO_HIGH,
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TableProperties* table_properties = nullptr, int level = -1,
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const uint64_t creation_time = 0, const uint64_t oldest_key_time = 0,
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Env::WriteLifeTimeHint write_hint = Env::WLTH_NOT_SET);
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} // namespace rocksdb
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