广域网存储系统中自适应缓存一致性研究  

Research on an Adaptive Cache Consistency in Storage System of WAN

作　　者：冯丹[1] 陈小庆[1] 李洁琼[1] 

机构地区：[1]华中科技大学计算机系统结构,武汉430074

出　　处：《微处理机》2007年第4期25-28,共4页Microprocessors

基　　金：国家973项目(2004CB318200);下一代互联网示范工程CNGI(分项CNGI-04-5-1D)

摘　　要：针对广域网环境中现有缓存一致性机制陈旧率高,扩展性差的缺陷,提出了一种自适应的缓存一致性机制,该机制通过对数据改变频率的量化分析,从多层次的一致性策略中智能化的为数据选择一种最合适的策略。通过仿真实验表明自适应一致性机制灵活性好,陈旧率低,副本更新频率优化。Focus on the limitation of high staleness rate and low expansibility in current cache consistency mechanism of current WAN, proposed a new adaptive consistency mechanism for cache on the base of currently universal consistency mechanisms. By the analysis of data change frequency, the new mechanism chooses the best strategy automatically from the muti -level consistency mechanism strategies. The imitate experimental results showed that the adaptive cache consistency mechanism implements easier, keeps low staleness rate and optimized copy update rate.

关 键 词：广域网 缓存一致性 MD5 陈旧率 

分 类 号：TP393.2[自动化与计算机技术—计算机应用技术]