教育资源网格的副本定位策略研究  

Replica location strategy in education resource grid

作　　者：邹立达[1] 刘方爱[1] 马艳[1] 

机构地区：[1]山东师范大学信息科学与工程学院,山东济南250014

出　　处：《计算机工程与设计》2008年第18期4697-4700,4721,共5页Computer Engineering and Design

基　　金：国家自然科学基金项目(90612003);山东省科技攻关计划基金项目(2006GGB01101)

摘　　要：副本定位是数据网格副本机制的关键问题。针对教育资源网格环境,引入了内容寻址网络CAN技术,提出了DC-CAN副本定位策略。介绍了DC-CAN策略中静态连续簇域分配和动态连续簇域分配两种算法,该算法使教育资源网格物理网络结构与逻辑结构保持同构,有效降低了寻路延迟,同时维护了负载均衡。仿真实验结果表明了DC-CAN寻路性能的提升。Replica location is the key problem of replica mechanism. Based on the theory and model of content addressable network （CAN）, the domain cluster CAN （DC-CAN） replica location strategy is presented for education resource grid. Two algorithms are introduced for allocation of cluster zones. The function of the algorithms is that the physical network structure of education resource grid can maintain topological isomorphic with the logical structure. It reduces the routing latency and at the same time keeps load balancing. The DC-CAN is proved efficiently in improving the routing performance by the analysis of experiments.

关 键 词：教育资源网格 副本定位 内容寻址网络 负载均衡 对等覆盖网络 

分 类 号：TP393.01[自动化与计算机技术—计算机应用技术]