【摘要】 在研究Web缓存性能时,一般考虑2个评价指标:命中率HR和字节命中率BHR。目前大多侧重于2个指标之一,或仅通过测试2个指标的数值来评价缓存替换算法优劣,没有从2个指标关系的角度来评价缓存替换算法的性能。该文讨论了Web缓存系统中命中率与字节命中率之间的关系,提出了一种Web缓存性能评价指标——命中比(FBR),讨论了该指标在Web缓存替换算法及Web预取性能评价中的应用,从而为度量缓存系统的性能提供参考依据。更多还原

【Abstract】 Two metrics are commonly utilized in the performance evaluation of Web caching replacement policies: hit ratio HR and byte hit ratioBHR.Most of the researches made the assessment by only considering one of the two metrics or based on the experimental results,and have thelimitation of lacking the performance evaluation from the viewpoint of relationship between the two metrics,which is discussed in detail in thepaper.A new Web caching performance metric: FBR is proposed which can be used as a performance measurement of Web caching replacementpolicies.FBR can also be made use of in the Web prefetching area so as to provide a basis for an efficient Web caching management.更多还原