在分析用户访问行为基础上实现代理缓存

PROXY CACHE IMPLEMENTATION BASED ON USER REQUESTS ANALYSIS

文中提出一个描述ＷＷＷ 结构的网站图Ｓｉｔｅ－Ｇｒａｐｈ 模型，在此基础上进行用户访问行为分析，从而提出了一个考虑实际访问请求模式的代理缓存系统ＵＲＡＣ．文中详细描述了ＵＲＡＣ的工作原理，对代理缓存设计时所要解决的命中率、一致性和替换算法等主要问题进行了讨论，并给出了性能分析。

A site\|graph model to describe the logic structure of World Wide Web is introduced in this paper. Based on this model, the behavior pattern of user requests for home pages is discussed and thus a proxy cache system URAC (user request attentive cache) is implemented. The working principles of URAC and the issues on hit rate, cache coherence, and replacement strategy are addressed in details. Furthermore, the performance of URAC is predicted through simulation. It is concluded that URAC is a practical proxy cache system that can improve valid hit rate and reduce access delay.