1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/db/catalog/collection_compact.h"
#include "mongo/db/catalog/collection_catalog.h"
#include "mongo/db/catalog/document_validation.h"
#include "mongo/db/catalog/index_key_validate.h"
#include "mongo/db/catalog/multi_index_block.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/index/index_access_method.h"
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/index_builds_coordinator.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/timeseries/catalog_helper.h"
#include "mongo/logv2/log.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/fail_point.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
namespace mongo {
MONGO_FAIL_POINT_DEFINE(pauseCompactCommandBeforeWTCompact);
using logv2::LogComponent;
namespace {
CollectionPtr getCollectionForCompact(OperationContext* opCtx,
const NamespaceString& collectionNss) {
invariant(opCtx->lockState()->isCollectionLockedForMode(collectionNss, MODE_IX));
NamespaceString resolvedNs = collectionNss;
if (auto timeseriesOptions = timeseries::getTimeseriesOptions(
opCtx, collectionNss, /*convertToBucketsNamespace=*/true)) {
resolvedNs = collectionNss.makeTimeseriesBucketsNamespace();
}
auto collectionCatalog = CollectionCatalog::get(opCtx);
CollectionPtr collection(collectionCatalog->lookupCollectionByNamespace(opCtx, resolvedNs));
if (!collection) {
std::shared_ptr<const ViewDefinition> view =
collectionCatalog->lookupView(opCtx, resolvedNs);
uassert(ErrorCodes::CommandNotSupportedOnView, "can't compact a view", !view);
uasserted(ErrorCodes::NamespaceNotFound, "collection does not exist");
}
return collection;
}
} // namespace
StatusWith<int64_t> compactCollection(OperationContext* opCtx,
const NamespaceString& collectionNss) {
AutoGetDb autoDb(opCtx, collectionNss.dbName(), MODE_IX);
Database* database = autoDb.getDb();
uassert(ErrorCodes::NamespaceNotFound, "database does not exist", database);
// The collection lock will be upgraded to an exclusive lock if the record store does not
// support online compaction.
boost::optional<Lock::CollectionLock> collLk;
collLk.emplace(opCtx, collectionNss, MODE_IX);
CollectionPtr collection = getCollectionForCompact(opCtx, collectionNss);
DisableDocumentValidation validationDisabler(opCtx);
auto recordStore = collection->getRecordStore();
OldClientContext ctx(opCtx, collectionNss);
if (!recordStore->compactSupported())
return Status(ErrorCodes::CommandNotSupported,
str::stream() << "cannot compact collection with record store: "
<< recordStore->name());
if (!recordStore->supportsOnlineCompaction()) {
// Storage engines that disallow online compaction should compact under an exclusive lock.
collLk.emplace(opCtx, collectionNss, MODE_X);
// Ensure the collection was not dropped during the re-lock.
collection = getCollectionForCompact(opCtx, collectionNss);
recordStore = collection->getRecordStore();
}
LOGV2_OPTIONS(20284,
{LogComponent::kCommand},
"compact {namespace} begin",
"Compact begin",
logAttrs(collectionNss));
auto bytesBefore = recordStore->storageSize(opCtx) + collection->getIndexSize(opCtx);
auto indexCatalog = collection->getIndexCatalog();
pauseCompactCommandBeforeWTCompact.pauseWhileSet();
Status status = recordStore->compact(opCtx);
if (!status.isOK())
return status;
// Compact all indexes (not including unfinished indexes)
status = indexCatalog->compactIndexes(opCtx);
if (!status.isOK())
return status;
auto bytesAfter = recordStore->storageSize(opCtx) + collection->getIndexSize(opCtx);
auto bytesDiff = static_cast<int64_t>(bytesBefore) - static_cast<int64_t>(bytesAfter);
// The compact operation might grow the file size if there is little free space left, because
// running a compact also triggers a checkpoint, which requires some space. Additionally, it is
// possible for concurrent writes and index builds to cause the size to grow while compact is
// running. So it is possible for the size after a compact to be larger than before it.
LOGV2(7386700,
"Compact end",
logAttrs(collectionNss),
"bytesBefore"_attr = bytesBefore,
"bytesAfter"_attr = bytesAfter,
"bytesDiff"_attr = bytesDiff);
return bytesDiff;
}
} // namespace mongo
|
