mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-30 04:41:49 +00:00
3c327ac2d0
Summary: Closes https://github.com/facebook/rocksdb/pull/2589 Differential Revision: D5431502 Pulled By: siying fbshipit-source-id: 8ebf8c87883daa9daa54b2303d11ce01ab1f6f75
92 lines
3.6 KiB
C++
92 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
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
#include "db/compaction_picker.h"
|
|
|
|
namespace rocksdb {
|
|
class UniversalCompactionPicker : public CompactionPicker {
|
|
public:
|
|
UniversalCompactionPicker(const ImmutableCFOptions& ioptions,
|
|
const InternalKeyComparator* icmp)
|
|
: CompactionPicker(ioptions, icmp) {}
|
|
virtual Compaction* PickCompaction(const std::string& cf_name,
|
|
const MutableCFOptions& mutable_cf_options,
|
|
VersionStorageInfo* vstorage,
|
|
LogBuffer* log_buffer) override;
|
|
|
|
virtual int MaxOutputLevel() const override { return NumberLevels() - 1; }
|
|
|
|
virtual bool NeedsCompaction(
|
|
const VersionStorageInfo* vstorage) const override;
|
|
|
|
private:
|
|
struct SortedRun {
|
|
SortedRun(int _level, FileMetaData* _file, uint64_t _size,
|
|
uint64_t _compensated_file_size, bool _being_compacted)
|
|
: level(_level),
|
|
file(_file),
|
|
size(_size),
|
|
compensated_file_size(_compensated_file_size),
|
|
being_compacted(_being_compacted) {
|
|
assert(compensated_file_size > 0);
|
|
assert(level != 0 || file != nullptr);
|
|
}
|
|
|
|
void Dump(char* out_buf, size_t out_buf_size,
|
|
bool print_path = false) const;
|
|
|
|
// sorted_run_count is added into the string to print
|
|
void DumpSizeInfo(char* out_buf, size_t out_buf_size,
|
|
size_t sorted_run_count) const;
|
|
|
|
int level;
|
|
// `file` Will be null for level > 0. For level = 0, the sorted run is
|
|
// for this file.
|
|
FileMetaData* file;
|
|
// For level > 0, `size` and `compensated_file_size` are sum of sizes all
|
|
// files in the level. `being_compacted` should be the same for all files
|
|
// in a non-zero level. Use the value here.
|
|
uint64_t size;
|
|
uint64_t compensated_file_size;
|
|
bool being_compacted;
|
|
};
|
|
|
|
// Pick Universal compaction to limit read amplification
|
|
Compaction* PickCompactionToReduceSortedRuns(
|
|
const std::string& cf_name, const MutableCFOptions& mutable_cf_options,
|
|
VersionStorageInfo* vstorage, double score, unsigned int ratio,
|
|
unsigned int num_files, const std::vector<SortedRun>& sorted_runs,
|
|
LogBuffer* log_buffer);
|
|
|
|
// Pick Universal compaction to limit space amplification.
|
|
Compaction* PickCompactionToReduceSizeAmp(
|
|
const std::string& cf_name, const MutableCFOptions& mutable_cf_options,
|
|
VersionStorageInfo* vstorage, double score,
|
|
const std::vector<SortedRun>& sorted_runs, LogBuffer* log_buffer);
|
|
|
|
// Used in universal compaction when the enabled_trivial_move
|
|
// option is set. Checks whether there are any overlapping files
|
|
// in the input. Returns true if the input files are non
|
|
// overlapping.
|
|
bool IsInputFilesNonOverlapping(Compaction* c);
|
|
|
|
static std::vector<SortedRun> CalculateSortedRuns(
|
|
const VersionStorageInfo& vstorage, const ImmutableCFOptions& ioptions);
|
|
|
|
// Pick a path ID to place a newly generated file, with its estimated file
|
|
// size.
|
|
static uint32_t GetPathId(const ImmutableCFOptions& ioptions,
|
|
uint64_t file_size);
|
|
};
|
|
} // namespace rocksdb
|
|
#endif // !ROCKSDB_LITE
|