混合结构P2P空间索引网络优化机制的研究与实现  

Study and implementation of optimization mechanism for hybrid P2P spatial indexing network

作　　者：吴家皋[1] 邵世伟[1] 华正[1] 邹志强[1] 胡斌[2] 

机构地区：[1]南京邮电大学计算机学院,南京210003 [2]南京师范大学虚拟地理环境教育部重点实验室,南京210046

出　　处：《计算机应用》2011年第9期2301-2304,共4页journal of Computer Applications

基　　金：国家863计划项目(2009AA12Z219);国家自然科学基金资助项目(40801149);东南大学计算机网络和信息集成教育部重点实验室开放研究基金项目(K93-9-2010-06)

摘　　要：针对当前P2P地理信息系统(G IS)在客户端网络资源利用方面的不足,从应用实际出发,对已有的混合结构P2P空间索引网络进行分析总结,提出一种新的组策略思想:将具有相同空间数据语义的节点加入到同一组中,由组中成员节点共同负担查询请求任务;同时,通过当前索引节点的替换算法和备份策略进一步提高整个网络的查询性能和稳定性。实验结果表明,在大并发量查询请求时有组策略的索引网络能够有效利用客户端的网络资源,提高查询性能。In allusion to the insufficiency of current P2P Geographic Information System （GIS） in utilizing network resources of clients, based on analyzing and summarizing the existing hybrid P2P spatial indexing network, a new idea of group strategy was proposed in view of practice. In this idea, peers with the same spatial data semantics were joined in the same group in which the burden of query was shared by group members together. Furthermore, a replacement algorithm of current index nodes and backup strategy were proposed to improve the query performance and stability of the overall network. The experimental results indicate that the indexing network with group strategy can effectively make use of clients＇ network resources and improve the query performance when a large number of queries request concurrently.

关 键 词：对等网 空间索引 组策略 替换算法 优化机制 

分 类 号：TP393.027[自动化与计算机技术—计算机应用技术]