基于网络带宽差异的数据网格动态复制策略

Dynamic replication strategy based on network bandwidth hierarchy

依据目前数据网格技术发展的现状,对数据网格网络带宽的分布状况与数据网格系统工作效率之间的关系进行了研究,提出一种集群网格拓扑结构,并结合BHR复制策略,设计出HRS复制策略。采用OptorSim试验平台对HRS算法进行了模拟,试验结果表明,HRS策略和其它复制策略相比在总作业执行时间上有明显提高。

According as the situation of data grid＇ s development, the relationship between distribution of the network bandwidth and work efficiency ofdata gird is researched. A cluster gird topology is proposed. Referring to BHR （bandwidth hierarchy based replication） strategy, HRS （hierarchical replication strategy） strategy is designed. OptorSim simulator is used to carry on the simulation of the HRS algorithm. The test result indicates that the HRS strategy is obviously excellent comparing with other replication strategy in total job execution time.