基于内容分发的数据网格副本创建策略

Strategy of data grid replica creation based on content distribution

结合混合的网格拓扑模型,提出了一种基于内容分发的副本快速创建策略。该策略使用区域中心节点之间的历史记录和传输代价,选择出一个最佳的区域中心,将新产生的文件传输到最佳区域中心;在客户节点从其他的区域中心传输某一文件的时候,同时在该客户节点所在的区域中心建立文件的副本。在网格模拟器OptorSim中测试了该策略,结果表明该策略能够减少作业的平均完成时间。

This paper proposed a strategy to quickly create a replica based on content-distribution,which used the history records between the regional central nodes and chose a best regional node where to transfer new files.When a client node received some file from other regional node,it would create the copy of the file on the regional node of this client node at the same time.It tested the strategy in the grid simulator OptorSim,which can reduce the average completion time of job.