一种卷级连续数据保护一致点插入方法  

An efficient consistent point inserting method for block level continuous data protection

作　　者：生拥宏[1] 汪东升[1] 鞠大鹏[1] 武健[1] 

机构地区：[1]清华大学计算机科学与技术系清华信息科学与技术国家实验室,北京100084

出　　处：《高技术通讯》2010年第11期1101-1107,共7页Chinese High Technology Letters

基　　金：863计划(2009AA01Z104)资助项目

摘　　要：形式化描述了应用层语义事件与卷级连续数据保护一致点插入的关系,提出了借助文件系统特定IO操作在正常IO流中插入一致点的算法。该方法提供的三种一致点插入技术分别能满足单个文件、目录和逻辑卷不同粒度的一致性恢复需要,同时也可以根据用户的定义弱化为传统的基于固定周期的快照备份方法。论文给出了系统的实现方法,评估了方法的有效性。实验表明,该方法提供了准确率较高的一致性恢复手段。This paper presents a formal description on the relationship between semantic of application and consistent checkpoints of continuous data protection and proposes an algorithm of inserting consistent checkpoints into normal IO by analyzing specific IO operations. The proposed three types of consistent checkpoint inserting methods can satisfy the consistence of single file, directory and logical volume respectively. The method can not only provide any point in time data recovery but also provide periodical snapshot backup under user definition. The implementation and experiment are described in the paper. The extensive experiment results demonstrate that the proposed methods can achieve a high accuracy in consistent restoration of block level continous data protection.

关 键 词：连续数据保护(CDP) 一致性 备份 

分 类 号：TP391.1[自动化与计算机技术—计算机应用技术]