log write ahead 提前写
log write-ahead protocol 运行日志先写原则
write-ahead log 预写日志 ; 预写记录档
Write Ahead Log 预写日志 ; 日志 ; 预写式日志
Write-ahead Log Rule 日志先写原则
log tape write-ahead 先写日志带
Write-ahead Transaction Log 预先记录日志
Hbase Write-Ahead-Log 预先写日志
write ahead log protocol 运行记录优先规则
When overwriting the original, a rollback journal or write-ahead log WAL file is used just as it would be for any other database transaction.
当将内容重新写回到原始数据库文件时，一个回滚日志或者写前日志wal文件将会被使用，正如它为其它数据库事务服务一样。
Write-ahead log scheme requires stable storage.
向前写日志系统需要稳定存储。
When in write-ahead log mode, only the auto_vacuum support property can be changed using VACUUM.
如果SQLite是运行在“写前日志”模式下，则只有（是否支持）auto_vacuum属性可以通过VACUUM命令进行修改。）
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