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7c673cae | 1 | // Copyright (c) 2011-present, Facebook, Inc. All rights reserved. |
11fdf7f2 TL |
2 | // This source code is licensed under both the GPLv2 (found in the |
3 | // COPYING file in the root directory) and Apache 2.0 License | |
4 | // (found in the LICENSE.Apache file in the root directory). | |
7c673cae FG |
5 | |
6 | #pragma once | |
7 | ||
8 | #include <stdint.h> | |
9 | ||
10 | #include <limits> | |
11 | #include <string> | |
12 | #include <vector> | |
13 | ||
14 | #include "rocksdb/types.h" | |
15 | ||
16 | namespace rocksdb { | |
17 | struct ColumnFamilyMetaData; | |
18 | struct LevelMetaData; | |
19 | struct SstFileMetaData; | |
20 | ||
21 | // The metadata that describes a column family. | |
22 | struct ColumnFamilyMetaData { | |
11fdf7f2 | 23 | ColumnFamilyMetaData() : size(0), file_count(0), name("") {} |
7c673cae | 24 | ColumnFamilyMetaData(const std::string& _name, uint64_t _size, |
494da23a TL |
25 | const std::vector<LevelMetaData>&& _levels) |
26 | : size(_size), name(_name), levels(_levels) {} | |
7c673cae FG |
27 | |
28 | // The size of this column family in bytes, which is equal to the sum of | |
29 | // the file size of its "levels". | |
30 | uint64_t size; | |
31 | // The number of files in this column family. | |
32 | size_t file_count; | |
33 | // The name of the column family. | |
34 | std::string name; | |
35 | // The metadata of all levels in this column family. | |
36 | std::vector<LevelMetaData> levels; | |
37 | }; | |
38 | ||
39 | // The metadata that describes a level. | |
40 | struct LevelMetaData { | |
41 | LevelMetaData(int _level, uint64_t _size, | |
494da23a TL |
42 | const std::vector<SstFileMetaData>&& _files) |
43 | : level(_level), size(_size), files(_files) {} | |
7c673cae FG |
44 | |
45 | // The level which this meta data describes. | |
46 | const int level; | |
47 | // The size of this level in bytes, which is equal to the sum of | |
48 | // the file size of its "files". | |
49 | const uint64_t size; | |
50 | // The metadata of all sst files in this level. | |
51 | const std::vector<SstFileMetaData> files; | |
52 | }; | |
53 | ||
54 | // The metadata that describes a SST file. | |
55 | struct SstFileMetaData { | |
11fdf7f2 TL |
56 | SstFileMetaData() |
57 | : size(0), | |
58 | name(""), | |
59 | db_path(""), | |
60 | smallest_seqno(0), | |
61 | largest_seqno(0), | |
62 | smallestkey(""), | |
63 | largestkey(""), | |
64 | num_reads_sampled(0), | |
494da23a TL |
65 | being_compacted(false), |
66 | num_entries(0), | |
67 | num_deletions(0) {} | |
68 | ||
11fdf7f2 TL |
69 | SstFileMetaData(const std::string& _file_name, const std::string& _path, |
70 | size_t _size, SequenceNumber _smallest_seqno, | |
7c673cae FG |
71 | SequenceNumber _largest_seqno, |
72 | const std::string& _smallestkey, | |
11fdf7f2 TL |
73 | const std::string& _largestkey, uint64_t _num_reads_sampled, |
74 | bool _being_compacted) | |
75 | : size(_size), | |
76 | name(_file_name), | |
77 | db_path(_path), | |
78 | smallest_seqno(_smallest_seqno), | |
79 | largest_seqno(_largest_seqno), | |
80 | smallestkey(_smallestkey), | |
81 | largestkey(_largestkey), | |
82 | num_reads_sampled(_num_reads_sampled), | |
494da23a TL |
83 | being_compacted(_being_compacted), |
84 | num_entries(0), | |
85 | num_deletions(0) {} | |
7c673cae FG |
86 | |
87 | // File size in bytes. | |
11fdf7f2 | 88 | size_t size; |
7c673cae FG |
89 | // The name of the file. |
90 | std::string name; | |
91 | // The full path where the file locates. | |
92 | std::string db_path; | |
93 | ||
94 | SequenceNumber smallest_seqno; // Smallest sequence number in file. | |
95 | SequenceNumber largest_seqno; // Largest sequence number in file. | |
494da23a TL |
96 | std::string smallestkey; // Smallest user defined key in the file. |
97 | std::string largestkey; // Largest user defined key in the file. | |
98 | uint64_t num_reads_sampled; // How many times the file is read. | |
7c673cae | 99 | bool being_compacted; // true if the file is currently being compacted. |
494da23a TL |
100 | |
101 | uint64_t num_entries; | |
102 | uint64_t num_deletions; | |
7c673cae FG |
103 | }; |
104 | ||
105 | // The full set of metadata associated with each SST file. | |
106 | struct LiveFileMetaData : SstFileMetaData { | |
107 | std::string column_family_name; // Name of the column family | |
494da23a TL |
108 | int level; // Level at which this file resides. |
109 | LiveFileMetaData() : column_family_name(), level(0) {} | |
7c673cae | 110 | }; |
7c673cae | 111 | } // namespace rocksdb |