用于灾难恢复的远程备份系统的模型与算法  

Models and Algorithms of Remote Backup Systems for Disaster Recovery

作　　者：李强[1] 张艳[2] 李舟军[1] 

机构地区：[1]国防科技大学计算机学院,湖南长沙410073 [2]四川大学数学学院,四川成都610064

出　　处：《计算机工程与科学》2005年第5期68-72,83,共6页Computer Engineering & Science

基　　金：国象"十五"科技攻关项目(2001BA102A07-04-01)

摘　　要：本文系统深入地介绍了现有远程备份系统的体系结构、模型和算法,讨论了每种模型和算法的适应范围及优点,分析了存在的缺陷和问题。在此基础上,提出了优化o2-safe算法。该算法在保证系统完整性和一致性的前提下,充分挖掘事务间的并发执行性,增加了事务处理的吞吐量。最后,讨论了用于灾难恢复的远程备份技术的发展趋势。A comprehensive survey on the architectures, models and algorithms oi remote backup systems is given, the advantages and applicable range of these models and algorithms are discussed respectively, the shortcomings and problems which exist are also analysed. Based on these, we present an optimized o2-safe algorithm, which sufficiently exploits parallelism between transactions and achieves high throughput without risking the loss of transactions in case of primary failures. Finally, the future trend of remote backup for disaster recovery is discussed.

关 键 词：数据备份 数据恢复 数据安全 远程备份系统 算法 计算机 

分 类 号：TP309.3[自动化与计算机技术—计算机系统结构]