【摘要】 提出了一种在数据网格环境下的可扩展的分布式副本定位方法.该方法利用索引结点和本地副本定位结点实现对同一个数据文件的多个副本的快速定位;将副本定位索引信息平均分布在多个索引结点上,并且能够自适应索引结点的动态加入或退出;同时利用本地副本定位节点完成本地副本的查询定位.理论分析和实验表明,SDRL能够快速由逻辑文件名定位其索引结点,具有负载均衡、可扩展和高效的特点.更多还原

【Abstract】 A new SDRL (scalable decentralized replica location method) in data grid is proposed. In SDRL replica location index nodes and replica location nodes are used to accelerate the process of loca-(ting) multiple replicas of the same data file. Replica location index information are spread evenly on index nodes which can adapt to the joining or departing of index nodes. Replica location nodes support local query for local replicas. Analysis and experiments show that SDRL can locate the index nodes quickly from the logical file names and gain scalability and good load balance.更多还原