三种Web缓存替换的最优化模型研究

Three optimizing models for Web cache replacement policies

根据影响Web缓存性能的文件大小、访问频度、延迟等因素,通过灵活地选择代价因子,得到了命中率最大化、字节命中率最大化和延迟最小化3种Web缓存替换的最优化模型.模拟实验验证了该模型的正确性、灵活性和适用性.

By analyzing the major factors which affect the cache performance,such as object size,frequency,and access delay,by choosing cost factor,three optimized models are obtained：maximization of hit rate,maximization of byte hit rate and minimization of delay.The analytical result showed that the optimizing models are right.In practical application,the optimized models have flexibility and feasibility.