Performance Analysis of WWW Cache Proxy Hierarchies

Wagner Meira Jr.Erik L S. FonsecaVirgílio A. F. AlmeidaCristina D. Murta

Although caching and the creation of cache server hierarchies has became a popular strategy for reducing user waiting time and network traffic, there is no recipe for determining the best hierarchy configuration given a set of machines and the workload that they have to serve. This paper presents a novel approach for analyzing the performance of cache proxy hierarchies that is based on two metrics: hierarchical hit ratio and cache efficiency. This approach allows users to easily quantify trade-offs among configurations, facilitating the tuning of cache hierarchies. We illustrate our approach by analyzing possible configurations for a cache server hierarchy.

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