Revision f5cdf931a032a93688eb26532c4153b6950fd640 authored by Abhishek Kona on 13 November 2012, 00:45:45 UTC, committed by Abhishek Kona on 16 November 2012, 17:09:00 UTC
Summary: Add option to read WAL and print a summary for each record. facebook task => #1885013 E.G. Output : ./ldb dump_wal --walfile=/tmp/leveldbtest-5907/dbbench/026122.log --header Sequence,Count,ByteSize 49981,1,100033 49981,1,100033 49982,1,100033 49981,1,100033 49982,1,100033 49983,1,100033 49981,1,100033 49982,1,100033 49983,1,100033 49984,1,100033 49981,1,100033 49982,1,100033 Test Plan: Works run ./ldb read_wal --wal-file=/tmp/leveldbtest-5907/dbbench/000078.log --header Reviewers: dhruba, heyongqiang Reviewed By: dhruba CC: emayanke, leveldb, zshao Differential Revision: https://reviews.facebook.net/D6675
1 parent e988c11
log_format.h
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
//
// Log format information shared by reader and writer.
// See ../doc/log_format.txt for more detail.
#ifndef STORAGE_LEVELDB_DB_LOG_FORMAT_H_
#define STORAGE_LEVELDB_DB_LOG_FORMAT_H_
namespace leveldb {
namespace log {
enum RecordType {
// Zero is reserved for preallocated files
kZeroType = 0,
kFullType = 1,
// For fragments
kFirstType = 2,
kMiddleType = 3,
kLastType = 4
};
static const int kMaxRecordType = kLastType;
static const int kBlockSize = 32768;
// Header is checksum (4 bytes), type (1 byte), length (2 bytes).
static const int kHeaderSize = 4 + 1 + 2;
} // namespace log
} // namespace leveldb
#endif // STORAGE_LEVELDB_DB_LOG_FORMAT_H_
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