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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
// 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
#include "rocksdb/db_dump_tool.h"
#include <cinttypes>
#include <iostream>
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "util/coding.h"
namespace ROCKSDB_NAMESPACE {
bool DbDumpTool::Run(const DumpOptions& dump_options,
ROCKSDB_NAMESPACE::Options options) {
ROCKSDB_NAMESPACE::DB* dbptr;
ROCKSDB_NAMESPACE::Status status;
std::unique_ptr<ROCKSDB_NAMESPACE::WritableFile> dumpfile;
char hostname[1024];
int64_t timesec = 0;
std::string abspath;
char json[4096];
static const char* magicstr = "ROCKDUMP";
static const char versionstr[8] = {0, 0, 0, 0, 0, 0, 0, 1};
ROCKSDB_NAMESPACE::Env* env = ROCKSDB_NAMESPACE::Env::Default();
// Open the database
options.create_if_missing = false;
status = ROCKSDB_NAMESPACE::DB::OpenForReadOnly(options, dump_options.db_path,
&dbptr);
if (!status.ok()) {
std::cerr << "Unable to open database '" << dump_options.db_path
<< "' for reading: " << status.ToString() << std::endl;
return false;
}
const std::unique_ptr<ROCKSDB_NAMESPACE::DB> db(dbptr);
status = env->NewWritableFile(dump_options.dump_location, &dumpfile,
ROCKSDB_NAMESPACE::EnvOptions());
if (!status.ok()) {
std::cerr << "Unable to open dump file '" << dump_options.dump_location
<< "' for writing: " << status.ToString() << std::endl;
return false;
}
ROCKSDB_NAMESPACE::Slice magicslice(magicstr, 8);
status = dumpfile->Append(magicslice);
if (!status.ok()) {
std::cerr << "Append failed: " << status.ToString() << std::endl;
return false;
}
ROCKSDB_NAMESPACE::Slice versionslice(versionstr, 8);
status = dumpfile->Append(versionslice);
if (!status.ok()) {
std::cerr << "Append failed: " << status.ToString() << std::endl;
return false;
}
if (dump_options.anonymous) {
snprintf(json, sizeof(json), "{}");
} else {
status = env->GetHostName(hostname, sizeof(hostname));
status = env->GetCurrentTime(×ec);
status = env->GetAbsolutePath(dump_options.db_path, &abspath);
snprintf(json, sizeof(json),
"{ \"database-path\": \"%s\", \"hostname\": \"%s\", "
"\"creation-time\": %" PRIi64 " }",
abspath.c_str(), hostname, timesec);
}
ROCKSDB_NAMESPACE::Slice infoslice(json, strlen(json));
char infosize[4];
ROCKSDB_NAMESPACE::EncodeFixed32(infosize, (uint32_t)infoslice.size());
ROCKSDB_NAMESPACE::Slice infosizeslice(infosize, 4);
status = dumpfile->Append(infosizeslice);
if (!status.ok()) {
std::cerr << "Append failed: " << status.ToString() << std::endl;
return false;
}
status = dumpfile->Append(infoslice);
if (!status.ok()) {
std::cerr << "Append failed: " << status.ToString() << std::endl;
return false;
}
const std::unique_ptr<ROCKSDB_NAMESPACE::Iterator> it(
db->NewIterator(ROCKSDB_NAMESPACE::ReadOptions()));
for (it->SeekToFirst(); it->Valid(); it->Next()) {
char keysize[4];
ROCKSDB_NAMESPACE::EncodeFixed32(keysize, (uint32_t)it->key().size());
ROCKSDB_NAMESPACE::Slice keysizeslice(keysize, 4);
status = dumpfile->Append(keysizeslice);
if (!status.ok()) {
std::cerr << "Append failed: " << status.ToString() << std::endl;
return false;
}
status = dumpfile->Append(it->key());
if (!status.ok()) {
std::cerr << "Append failed: " << status.ToString() << std::endl;
return false;
}
char valsize[4];
ROCKSDB_NAMESPACE::EncodeFixed32(valsize, (uint32_t)it->value().size());
ROCKSDB_NAMESPACE::Slice valsizeslice(valsize, 4);
status = dumpfile->Append(valsizeslice);
if (!status.ok()) {
std::cerr << "Append failed: " << status.ToString() << std::endl;
return false;
}
status = dumpfile->Append(it->value());
if (!status.ok()) {
std::cerr << "Append failed: " << status.ToString() << std::endl;
return false;
}
}
if (!it->status().ok()) {
std::cerr << "Database iteration failed: " << status.ToString()
<< std::endl;
return false;
}
return true;
}
bool DbUndumpTool::Run(const UndumpOptions& undump_options,
ROCKSDB_NAMESPACE::Options options) {
ROCKSDB_NAMESPACE::DB* dbptr;
ROCKSDB_NAMESPACE::Status status;
ROCKSDB_NAMESPACE::Env* env;
std::unique_ptr<ROCKSDB_NAMESPACE::SequentialFile> dumpfile;
ROCKSDB_NAMESPACE::Slice slice;
char scratch8[8];
static const char* magicstr = "ROCKDUMP";
static const char versionstr[8] = {0, 0, 0, 0, 0, 0, 0, 1};
env = ROCKSDB_NAMESPACE::Env::Default();
status = env->NewSequentialFile(undump_options.dump_location, &dumpfile,
ROCKSDB_NAMESPACE::EnvOptions());
if (!status.ok()) {
std::cerr << "Unable to open dump file '" << undump_options.dump_location
<< "' for reading: " << status.ToString() << std::endl;
return false;
}
status = dumpfile->Read(8, &slice, scratch8);
if (!status.ok() || slice.size() != 8 ||
memcmp(slice.data(), magicstr, 8) != 0) {
std::cerr << "File '" << undump_options.dump_location
<< "' is not a recognizable dump file." << std::endl;
return false;
}
status = dumpfile->Read(8, &slice, scratch8);
if (!status.ok() || slice.size() != 8 ||
memcmp(slice.data(), versionstr, 8) != 0) {
std::cerr << "File '" << undump_options.dump_location
<< "' version not recognized." << std::endl;
return false;
}
status = dumpfile->Read(4, &slice, scratch8);
if (!status.ok() || slice.size() != 4) {
std::cerr << "Unable to read info blob size." << std::endl;
return false;
}
uint32_t infosize = ROCKSDB_NAMESPACE::DecodeFixed32(slice.data());
status = dumpfile->Skip(infosize);
if (!status.ok()) {
std::cerr << "Unable to skip info blob: " << status.ToString() << std::endl;
return false;
}
options.create_if_missing = true;
status = ROCKSDB_NAMESPACE::DB::Open(options, undump_options.db_path, &dbptr);
if (!status.ok()) {
std::cerr << "Unable to open database '" << undump_options.db_path
<< "' for writing: " << status.ToString() << std::endl;
return false;
}
const std::unique_ptr<ROCKSDB_NAMESPACE::DB> db(dbptr);
uint32_t last_keysize = 64;
size_t last_valsize = 1 << 20;
std::unique_ptr<char[]> keyscratch(new char[last_keysize]);
std::unique_ptr<char[]> valscratch(new char[last_valsize]);
while (1) {
uint32_t keysize, valsize;
ROCKSDB_NAMESPACE::Slice keyslice;
ROCKSDB_NAMESPACE::Slice valslice;
status = dumpfile->Read(4, &slice, scratch8);
if (!status.ok() || slice.size() != 4) break;
keysize = ROCKSDB_NAMESPACE::DecodeFixed32(slice.data());
if (keysize > last_keysize) {
while (keysize > last_keysize) last_keysize *= 2;
keyscratch = std::unique_ptr<char[]>(new char[last_keysize]);
}
status = dumpfile->Read(keysize, &keyslice, keyscratch.get());
if (!status.ok() || keyslice.size() != keysize) {
std::cerr << "Key read failure: "
<< (status.ok() ? "insufficient data" : status.ToString())
<< std::endl;
return false;
}
status = dumpfile->Read(4, &slice, scratch8);
if (!status.ok() || slice.size() != 4) {
std::cerr << "Unable to read value size: "
<< (status.ok() ? "insufficient data" : status.ToString())
<< std::endl;
return false;
}
valsize = ROCKSDB_NAMESPACE::DecodeFixed32(slice.data());
if (valsize > last_valsize) {
while (valsize > last_valsize) last_valsize *= 2;
valscratch = std::unique_ptr<char[]>(new char[last_valsize]);
}
status = dumpfile->Read(valsize, &valslice, valscratch.get());
if (!status.ok() || valslice.size() != valsize) {
std::cerr << "Unable to read value: "
<< (status.ok() ? "insufficient data" : status.ToString())
<< std::endl;
return false;
}
status = db->Put(ROCKSDB_NAMESPACE::WriteOptions(), keyslice, valslice);
if (!status.ok()) {
fprintf(stderr, "Unable to write database entry\n");
return false;
}
}
if (undump_options.compact_db) {
status = db->CompactRange(ROCKSDB_NAMESPACE::CompactRangeOptions(), nullptr,
nullptr);
if (!status.ok()) {
fprintf(stderr,
"Unable to compact the database after loading the dumped file\n");
return false;
}
}
return true;
}
} // namespace ROCKSDB_NAMESPACE
#endif // ROCKSDB_LITE
|
