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
|
/**
* 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 <string>
#include <vector>
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/collection_compact.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/commands.h"
#include "mongo/db/concurrency/d_concurrency.h"
#include "mongo/db/curop.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/repl/replication_coordinator.h"
namespace mongo {
using std::string;
using std::stringstream;
class CompactCmd : public BasicCommand {
public:
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual bool adminOnly() const {
return false;
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) const {
ActionSet actions;
actions.addAction(ActionType::compact);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
std::string help() const override {
return "compact collection\n"
"warning: this operation locks the database and is slow. you can cancel with "
"killOp()\n"
"{ compact : <collection_name>, [force:<bool>] }\n"
" force - allows to run on a replica set primary\n";
}
CompactCmd() : BasicCommand("compact") {}
bool run(OperationContext* opCtx,
const DatabaseName& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
NamespaceString nss = CommandHelpers::parseNsCollectionRequired(dbName, cmdObj);
repl::ReplicationCoordinator* replCoord = repl::ReplicationCoordinator::get(opCtx);
uassert(ErrorCodes::IllegalOperation,
"will not run compact on an active replica set primary as this is a slow blocking "
"operation. use force:true to force",
!replCoord->getMemberState().primary() || cmdObj["force"].trueValue());
// Items in system.* cannot be moved as there might be pointers to them.
uassert(ErrorCodes::InvalidNamespace, "can't compact a system namespace", !nss.isSystem());
// This command is internal to the storage engine and should not block oplog application.
ShouldNotConflictWithSecondaryBatchApplicationBlock noPBWMBlock(opCtx->lockState());
StatusWith<int64_t> status = compactCollection(opCtx, nss);
uassertStatusOK(status.getStatus());
int64_t bytesFreed = status.getValue();
if (bytesFreed < 0) {
// When compacting a collection that is actively being written to, it is possible that
// the collection is larger at the completion of compaction than when it started.
bytesFreed = 0;
}
result.appendNumber("bytesFreed", static_cast<long long>(bytesFreed));
return true;
}
};
static CompactCmd compactCmd;
} // namespace mongo
|
