【作者】 湛文韬； 李战怀； 王彦龙； 郑然；

【Author】 Zhan Wentao,Li Zhanhuai,Wang Yanlong,and Zheng Ran (College of Computer Science,Northwestern Polytechnical University,Xi’an 710072)

【机构】 西北工业大学计算机学院；

【摘要】 远程数据备份系统是实现数据容灾的一个重要前提,而日志机制是备份系统的基础.在远程数据备份系统日志结构的基础上,针对已有日志机制的不足,提出了一种延迟保护策略.讨论了该策略的实现,并结合相关测试数据设计了一种自适应算法.延迟保护策略在远程数据备份系统中得到了很好的实现,原型实验表明,该策略能减小主从数据相位差,避免日志溢出,较好地保护了系统的日志结构,提高了数据的可恢复性.更多还原

【Abstract】 The remote data backup system is the promise in the implementation of data disaster tolerance, and log mechanism is the basis of the backup system.Presented in this paper is a latency protection strategy against the disadvantage of the existing log mechanism on the basis of the log structure of the remote data backup system.After discussing the implementation of the strategy,an adaptive algorithm is designed using the relative test data.Latency protection strategy is well implemented in remote data backup system. It is proved by prototype experiment that this strategy can greatly reduce the data phase between primary and secondary and avoid log overflow,which has great help to protect log structure and improve the recoverability of data.更多还原