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为了提高数据网格副本定位机制的负载平衡性和可扩展性,提出一种均匀分配节点标识的分布式hash表结构(ED-Chord),设计了基于对等网模式的层次结构副本定位机制(PRLM)。ED-Chord采用分布式方式获取节点位置分布信息,据此进行优化选择新节点的加入位置,使节点分布更加均匀,PRLM全局副本目录采用ED-Chord结构进行设计,本地副本目录利用虚拟组织的局部性进行查询。分析和实验结果表明:ED-Chord节点标识分布均匀,PRLM具有良好的副本定位时间性能,节点的负载平衡性与可扩展性较好。
In order to improve the load balancing and scalability of data grid locating mechanism, a distributed hash table structure (ED-Chord) is proposed to uniformly allocate node identities. A hierarchical replica locating mechanism based on peer-to-peer PRLM). ED-Chord uses distributed approach to get the location information of nodes, and then optimizes the location of new nodes to choose, so that the distribution of nodes is more uniform. The PRLM global replica directory is designed by using ED-Chord structure. Local replica directory uses the part of virtual organization Sex inquiries. The analysis and experimental results show that ED-Chord nodes have uniform distribution of labels, PRLM has good performance of replica positioning time, and node load balancing and scalability are better.