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
|
/**
* Copyright (c) 2016-present, Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string>
#include <sstream>
#include "caffe2/core/db.h"
#include "caffe2/core/init.h"
#include "caffe2/proto/caffe2_pb.h"
#include "caffe2/core/logging.h"
C10_DEFINE_string(input_db, "", "The input db.");
C10_DEFINE_int(splits, 0, "The number of splits.");
C10_DEFINE_string(db_type, "", "The db type.");
C10_DEFINE_int(batch_size, 1000, "The write batch size.");
namespace caffe2 {
static int Split(int argc, char** argv) {
GlobalInit(&argc, &argv);
CAFFE_ENFORCE(FLAGS_input_db.size(), "Must specify --input_db=/path/to/db.");
CAFFE_ENFORCE(FLAGS_splits > 0, "Must specify a nonnegative split number.");
CAFFE_ENFORCE(FLAGS_db_type.size(), "Must specify --db_type=[a db type].");
unique_ptr<db::DB> in_db(
db::CreateDB(FLAGS_db_type, FLAGS_input_db, db::READ));
CAFFE_ENFORCE(in_db != nullptr, "Cannot open input db: ", FLAGS_input_db);
unique_ptr<db::Cursor> cursor(in_db->NewCursor());
// This usually won't happen, but FWIW.
CAFFE_ENFORCE(
cursor != nullptr, "Cannot obtain cursor for input db: ", FLAGS_input_db);
vector<unique_ptr<db::DB>> out_dbs;
vector<unique_ptr<db::Transaction>> transactions;
for (int i = 0; i < FLAGS_splits; ++i) {
out_dbs.push_back(unique_ptr<db::DB>(db::CreateDB(
FLAGS_db_type, FLAGS_input_db + "_split_" + to_string(i), db::NEW)));
CAFFE_ENFORCE(out_dbs.back().get(), "Cannot create output db #", i);
transactions.push_back(
unique_ptr<db::Transaction>(out_dbs[i]->NewTransaction()));
CAFFE_ENFORCE(
transactions.back().get(), "Cannot get transaction for output db #", i);
}
int count = 0;
for (; cursor->Valid(); cursor->Next()) {
transactions[count % FLAGS_splits]->Put(cursor->key(), cursor->value());
if (++count % FLAGS_batch_size == 0) {
for (int i = 0; i < FLAGS_splits; ++i) {
transactions[i]->Commit();
}
LOG(INFO) << "Split " << count << " items so far.";
}
}
LOG(INFO) << "A total of " << count << " items processed.";
return 0;
}
} // namespace caffe2
int main(int argc, char** argv) {
return caffe2::Split(argc, argv);
}
|
