基于同一快照卷的多时间点的增量快照设计  

Design of Repetitious Points Incremental Snapshots Based on Same Snapshot Volume

作　　者：徐光平[1] 王刚[1] 刘璟[1] 

机构地区：[1]南开大学信息技术科学学院

出　　处：《计算机工程与应用》2005年第3期113-115,共3页Computer Engineering and Applications

基　　金：国家自然科学基金项目(编号:60273031);教育部博士点科研基金项目(编号:20020055021)

摘　　要：存储子系统层次的快照系统常用的数据复制技术主要有拆分镜像和写前拷贝等。论文在比较两者特点的基础上,将两者有机地结合起来,提出了基于同一快照卷的多时间点增量快照。然后详细分析了快照过程中位图表示的数据状态和变换设计,尤其是多时间点快照的接管。最后分析了该快照方案的功能应用,包括快照卷拆分、数据恢复和快照卷升级等。The common data replicate technologies of snapshot system in storage subsystem layer are split mirror and copy-on-write.This paper gives a comparison between them and proposes the repetitious points incremental snapshots based on the same snapshot volume combining with the above two technologies.And then the data states and states change design are discussed,especially the takeover of repetitious points incremental snapshots,which are presented by bitmaps.Finally its functions and applications are analyzed including snapshot volume splitting,recover and upgrade.

关 键 词：快照 位图 拆分镜像 写前拷贝 增量快照 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]