DRCSM:一种新的非集中副本一致性服务模型  

DRCSM: a Novel Decentralized Replica Consistency Service Model

作　　者：郑硕[1] 李明楚[1] 孙伟峰[1] 

机构地区：[1]大连理工大学软件学院,辽宁大连116621

出　　处：《小型微型计算机系统》2011年第8期1622-1627,共6页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60903153;61070181)资助;中日地区合作基金项目(51021140004)资助;国家"九七三"重点基础研究发展计划项目(2007CB714205)资助;国家自然科学基金重点项目(90715037)资助

摘　　要：为解决现有副本更新策略的瓶颈问题,提出一种基于时间戳和副本标识的非集中副本更新一致性模型DRCSM,该模型将更新的功能转移到各个次副本节点,可以有效地解决单一的从主副本节点更新带来的弊端.对新的模型DRCSM做了框架设计和过程设计,并加以比较分析.用仿真软件Optorsim实现了DRCSM和现有两种副本一致性模型Aggressive copy,Lazycopy.仿真结果也表明,DRCSM能有效地减少平均作业执行时间以及网络负载,并在复制的次数上优于积极拷贝,具有整体更优的性能.For solving the bottleneck problems of current replica update strategies,a decentralized replica consistency service model based on timestamp and identification is proposed which is called DRCSM.DRCSM shifts updating function to each secondary replica node,which can solve the drawbacks updating from the single master replica node.The framework and process of DRCSM is designed and also analyzed.At last,three models which are aggressive copy,lazy copy and DRCSM are simulated by the simulator Optorsim.The results show that DRCSM can reduce the mean job time and network load effectively,at the same time,it is better than aggressive copy in replicating times,having better performance in.

关 键 词：时间戳 副本标识 副本一致性 非集中副本更新 

分 类 号：TP399[自动化与计算机技术—计算机应用技术]