网格环境下基于传输代价的副本优化策略  

Optimization of replication strategy based on transport cost in grid environments

作　　者：赵秋云[1] 罗省贤 魏乐[1] 

机构地区：[1]成都信息工程学院计算机学院,成都610225 [2]成都理工大学信息工程学院,成都610059

出　　处：《计算机应用研究》2010年第4期1444-1447,共4页Application Research of Computers

基　　金：成都信息工程学院院级科研资助项目(CRF200725)

摘　　要：在深入分析影响副本策略性能的各种因素的基础上,将多种因素和传输代价联系起来进行建模,提出一种副本优化策略。优化策略基于传输代价,综合考虑文件访问次数、大小、存在时间等多种因素,并充分利用文件访问次数的集合特征,提供了一个动态、全局的副本管理方法。在网格仿真器OptorSim中对基于传输代价的优化策略进行了实现和评估分析。实验分析证明,优化后的副本策略较现有策略有明显优势。This paper studied the relations between factors about algorithms＇ capability and file transport cost and built these factors＇ model based on the analyses on several factors.It designed an optimization of replication strategy.The optimization strategy was based on transport cost,considering the file access times,size,existing time factors,aggregating the access times reasonable,and providing a dynamical and comprehensive replica management method.By using the simulator of OptorSim,carried out the experiments and analyses about the improved strategy successfully.It has been proved that the strategy can be applied to real grid environment easily and improve the efficiency of replica management effectively.

关 键 词：副本 副本策略 传输代价 OPTORSIM 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]