mirror of
https://github.com/facebook/rocksdb.git
synced 2024-12-03 14:52:53 +00:00
3c327ac2d0
Summary: Closes https://github.com/facebook/rocksdb/pull/2589 Differential Revision: D5431502 Pulled By: siying fbshipit-source-id: 8ebf8c87883daa9daa54b2303d11ce01ab1f6f75
95 lines
3.2 KiB
C++
95 lines
3.2 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).
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <limits>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "rocksdb/types.h"
|
|
|
|
namespace rocksdb {
|
|
struct ColumnFamilyMetaData;
|
|
struct LevelMetaData;
|
|
struct SstFileMetaData;
|
|
|
|
// The metadata that describes a column family.
|
|
struct ColumnFamilyMetaData {
|
|
ColumnFamilyMetaData() : size(0), name("") {}
|
|
ColumnFamilyMetaData(const std::string& _name, uint64_t _size,
|
|
const std::vector<LevelMetaData>&& _levels) :
|
|
size(_size), name(_name), levels(_levels) {}
|
|
|
|
// The size of this column family in bytes, which is equal to the sum of
|
|
// the file size of its "levels".
|
|
uint64_t size;
|
|
// The number of files in this column family.
|
|
size_t file_count;
|
|
// The name of the column family.
|
|
std::string name;
|
|
// The metadata of all levels in this column family.
|
|
std::vector<LevelMetaData> levels;
|
|
};
|
|
|
|
// The metadata that describes a level.
|
|
struct LevelMetaData {
|
|
LevelMetaData(int _level, uint64_t _size,
|
|
const std::vector<SstFileMetaData>&& _files) :
|
|
level(_level), size(_size),
|
|
files(_files) {}
|
|
|
|
// The level which this meta data describes.
|
|
const int level;
|
|
// The size of this level in bytes, which is equal to the sum of
|
|
// the file size of its "files".
|
|
const uint64_t size;
|
|
// The metadata of all sst files in this level.
|
|
const std::vector<SstFileMetaData> files;
|
|
};
|
|
|
|
// The metadata that describes a SST file.
|
|
struct SstFileMetaData {
|
|
SstFileMetaData() {}
|
|
SstFileMetaData(const std::string& _file_name, const std::string& _path,
|
|
uint64_t _size, SequenceNumber _smallest_seqno,
|
|
SequenceNumber _largest_seqno,
|
|
const std::string& _smallestkey,
|
|
const std::string& _largestkey, uint64_t _num_reads_sampled,
|
|
bool _being_compacted)
|
|
: size(_size),
|
|
name(_file_name),
|
|
db_path(_path),
|
|
smallest_seqno(_smallest_seqno),
|
|
largest_seqno(_largest_seqno),
|
|
smallestkey(_smallestkey),
|
|
largestkey(_largestkey),
|
|
num_reads_sampled(_num_reads_sampled),
|
|
being_compacted(_being_compacted) {}
|
|
|
|
// File size in bytes.
|
|
uint64_t size;
|
|
// The name of the file.
|
|
std::string name;
|
|
// The full path where the file locates.
|
|
std::string db_path;
|
|
|
|
SequenceNumber smallest_seqno; // Smallest sequence number in file.
|
|
SequenceNumber largest_seqno; // Largest sequence number in file.
|
|
std::string smallestkey; // Smallest user defined key in the file.
|
|
std::string largestkey; // Largest user defined key in the file.
|
|
uint64_t num_reads_sampled; // How many times the file is read.
|
|
bool being_compacted; // true if the file is currently being compacted.
|
|
};
|
|
|
|
// The full set of metadata associated with each SST file.
|
|
struct LiveFileMetaData : SstFileMetaData {
|
|
std::string column_family_name; // Name of the column family
|
|
int level; // Level at which this file resides.
|
|
};
|
|
} // namespace rocksdb
|