一种纯分布式P2P协作缓存PWCache

摘要

Current pure distributed Peer-to-Peer(P2P) cooperative Web cache system is not combined with the characteristics of users access the Web. To solve the problem, a pure distributed P2P cooperative Web cache system, namely PWCache, is proposed. The underlying P2P routing mechanism of PWCache uses SA-Chord and the upper cache positioning mechanism uses the URL-pathed index and lookup scheme. In this way, not only performance problem caused by the heterogeneity among P2P nodes is overcome, but also the characteristics of Web users to access are used. Simulation experimental results show that compared with the previous solutions, PWCache can achieve better query performance.%针对目前纯分布式点对点(P2P)协作缓存没有结合用户访问Web特性的问题,提出一种纯分布式协作缓存——PWCache.在PWCache中,其下层路由机制使用SA-Chord,上层缓存定位机制使用基于URL划分的缓存定位机制,既能克服节点之间的差异性带来的性能问题,又能利用用户访问Web的特性.实验结果表明,相对于其他基于P2P的协作缓存机制,PWCache具有更好的查询性能.