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一种块级连续数据保护系统的快速恢复方法

Keywords: 连续数据保护,按需恢复,临时磁盘映像

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Abstract:

针对传统连续数据保护技术需要遍历连续数据保护(CDP)日志以提供任意时间点磁盘镜像的问题,提出了一种新的快速恢复技术,即基于后向连接的按需快速恢复技术.在讨论了该快速恢复技术使用的基本数据结构,并引进了在基本数据结构中加入指针构成的后向连接的基础上,给出并分析了利用后向连接实现任意时间点快速恢复的相关算法.通过在实际工作负载下的模拟实验,说明了在恢复时间点距离当前时间点较近的情况下,使用快速恢复方法能够以可接受的响应时间为代价完成快速恢复.

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