一种文件级连续数据保护系统的实现与生存性量化  

Implementation of a File-level Continuous Data Protection System and its Survivability Quantification

作　　者：吴世忠[1] 熊琦[1] 刘晖[1] 刘林[1] 王丽娜[2] 

机构地区：[1]中国信息安全测评中心,北京100085 [2]武汉大学计算机学院,武汉430072

出　　处：《计算机科学》2012年第2期109-114,158,共7页Computer Science

基　　金：国家自然科学基金重大研究计划(90818021)资助

摘　　要：针对传统容灾备份技术的不足,设计并实现了一种文件级别连续保护(CDP)系统。首先设计了CDP系统的部署和组成结构;然后描述了CDP数据包、通信协议、数据的逻辑及物理存储以及任务调度等模块的设计思想;在给出总体和详细设计后,给出了任意时间点文件恢复和任意时间点文件视图查询的实现算法;最后使用半马尔可夫过程进行了生存性分析,在指出其脆弱性的前提下给出了生存性增强的可行途径。Regarding the defects of traditional disaster tolerant technology,a novel file-level continuous data protection system was proposed.The deposition method and the design of CDP components were described first.Next the structure of CDP package,data transportation protocol,the logical/physical structure for data storing,and task scheduling methodology were designed.The process of data recovery and data view producing algorithm were presented based on the design mentioned above.Then the algorithm for restoring any time point file and querying any time point file view was designed.Finally a model based on Semi-Markov Process was established and survivability metric was calculated,some promising improvement method was given.

关 键 词：连续数据保护 文件视图 索引日志 数据恢复 半马尔可夫模型 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]