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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
// 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).
//
#ifndef ROCKSDB_LITE
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>
#include <stdint.h>
#include <algorithm>
#include <string>
#include "db/db_impl.h"
#include "db/job_context.h"
#include "db/version_set.h"
#include "port/port.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "util/file_util.h"
#include "util/filename.h"
#include "util/mutexlock.h"
#include "util/sync_point.h"
namespace rocksdb {
Status DBImpl::DisableFileDeletions() {
InstrumentedMutexLock l(&mutex_);
++disable_delete_obsolete_files_;
if (disable_delete_obsolete_files_ == 1) {
ROCKS_LOG_INFO(immutable_db_options_.info_log, "File Deletions Disabled");
} else {
ROCKS_LOG_WARN(immutable_db_options_.info_log,
"File Deletions Disabled, but already disabled. Counter: %d",
disable_delete_obsolete_files_);
}
return Status::OK();
}
Status DBImpl::EnableFileDeletions(bool force) {
// Job id == 0 means that this is not our background process, but rather
// user thread
JobContext job_context(0);
bool file_deletion_enabled = false;
{
InstrumentedMutexLock l(&mutex_);
if (force) {
// if force, we need to enable file deletions right away
disable_delete_obsolete_files_ = 0;
} else if (disable_delete_obsolete_files_ > 0) {
--disable_delete_obsolete_files_;
}
if (disable_delete_obsolete_files_ == 0) {
file_deletion_enabled = true;
FindObsoleteFiles(&job_context, true);
bg_cv_.SignalAll();
}
}
if (file_deletion_enabled) {
ROCKS_LOG_INFO(immutable_db_options_.info_log, "File Deletions Enabled");
PurgeObsoleteFiles(job_context);
} else {
ROCKS_LOG_WARN(immutable_db_options_.info_log,
"File Deletions Enable, but not really enabled. Counter: %d",
disable_delete_obsolete_files_);
}
job_context.Clean();
LogFlush(immutable_db_options_.info_log);
return Status::OK();
}
int DBImpl::IsFileDeletionsEnabled() const {
return !disable_delete_obsolete_files_;
}
Status DBImpl::GetLiveFiles(std::vector<std::string>& ret,
uint64_t* manifest_file_size,
bool flush_memtable) {
*manifest_file_size = 0;
mutex_.Lock();
if (flush_memtable) {
// flush all dirty data to disk.
Status status;
if (immutable_db_options_.atomic_flush) {
autovector<ColumnFamilyData*> cfds;
SelectColumnFamiliesForAtomicFlush(&cfds);
mutex_.Unlock();
status = AtomicFlushMemTables(cfds, FlushOptions(),
FlushReason::kGetLiveFiles);
mutex_.Lock();
} else {
for (auto cfd : *versions_->GetColumnFamilySet()) {
if (cfd->IsDropped()) {
continue;
}
cfd->Ref();
mutex_.Unlock();
status = FlushMemTable(cfd, FlushOptions(), FlushReason::kGetLiveFiles);
TEST_SYNC_POINT("DBImpl::GetLiveFiles:1");
TEST_SYNC_POINT("DBImpl::GetLiveFiles:2");
mutex_.Lock();
cfd->Unref();
if (!status.ok()) {
break;
}
}
}
versions_->GetColumnFamilySet()->FreeDeadColumnFamilies();
if (!status.ok()) {
mutex_.Unlock();
ROCKS_LOG_ERROR(immutable_db_options_.info_log, "Cannot Flush data %s\n",
status.ToString().c_str());
return status;
}
}
// Make a set of all of the live *.sst files
std::vector<FileDescriptor> live;
for (auto cfd : *versions_->GetColumnFamilySet()) {
if (cfd->IsDropped()) {
continue;
}
cfd->current()->AddLiveFiles(&live);
}
ret.clear();
ret.reserve(live.size() + 3); // *.sst + CURRENT + MANIFEST + OPTIONS
// create names of the live files. The names are not absolute
// paths, instead they are relative to dbname_;
for (const auto& live_file : live) {
ret.push_back(MakeTableFileName("", live_file.GetNumber()));
}
ret.push_back(CurrentFileName(""));
ret.push_back(DescriptorFileName("", versions_->manifest_file_number()));
ret.push_back(OptionsFileName("", versions_->options_file_number()));
// find length of manifest file while holding the mutex lock
*manifest_file_size = versions_->manifest_file_size();
mutex_.Unlock();
return Status::OK();
}
Status DBImpl::GetSortedWalFiles(VectorLogPtr& files) {
{
// If caller disabled deletions, this function should return files that are
// guaranteed not to be deleted until deletions are re-enabled. We need to
// wait for pending purges to finish since WalManager doesn't know which
// files are going to be purged. Additional purges won't be scheduled as
// long as deletions are disabled (so the below loop must terminate).
InstrumentedMutexLock l(&mutex_);
while (disable_delete_obsolete_files_ > 0 &&
pending_purge_obsolete_files_ > 0) {
bg_cv_.Wait();
}
}
return wal_manager_.GetSortedWalFiles(files);
}
}
#endif // ROCKSDB_LITE
|
