代理缓存一致性策略和替换策略的研究  

Research on consistency and replacement policies for proxy cache

作　　者：张超群[1] 李陶深[2] 张增芳[3] 

机构地区：[1]广西民族学院计算机与信息科学学院,广西南宁530006 [2]广西大学计算机与电子信息学院,广西南宁530004 [3]广西工学院计算机系,广西柳州545006

出　　处：《计算机工程与设计》2005年第11期2913-2916,共4页Computer Engineering and Design

基　　金：广西省自然科学基金项目(0229008);广西"新世纪十百千人才工程"专项基金项目(2001213)

摘　　要：针对代理缓存的一致性策略和替换策略还没有很好地结合起来,从而影响了代理缓存系统的整体性能的现状,分别探讨了基于Internet的代理缓存一致性策略和替换策略的处理流程、性能评价指标和研究现状,进而给出将这两种策略结合起来的一致性—替换算法的处理流程,并提出陈旧命中比是其主要性能评价指标,能很好地衡量代理缓存的各种算法的优劣和代理缓存系统的整体性能。Cache consistency policies are not very well combined with cache replacement policies, which affects the overall performance of a proxy caching system accordingly. Therefore, the work flow, performance metrics and research status of cache consistency and replacement policies for the Intemet were discussed respectively. Subsequently, the work flow and performance metrics of consistency and replacement algorithm were proposed. A new key performance metric called staleness-hit rate can better estimate all the algorithms for a proxy cache and the overall performance of a proxy caching system.

关 键 词：代理缓存 一致性策略 替换策略 一致性一替换算法 陈旧命中比 

分 类 号：TP393.02[自动化与计算机技术—计算机应用技术]