HP Labs Technical Reports
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Improving Proxy Cache Performance - Analyzing Three Cache Replacement Policies
Dilley, John; Arlitt, Martin
Keyword(s): World-Wide Web; proxy caching; replacement policies; performance evaluation
Abstract: Caching in the World Wide Web has been used to enhance the scalability and performance of user access to popular web content. Caches reduce bandwidth demand, improve response times for popular objects, and help reduce the effects of so called "flash crowds". There are several cache implementations available from software and appliance vendors as well as the Squid open source cache software. The cache replacement policy determines which objects remain in cache and which are evicted to make room for new objects. The choice of this policy has an effect on the network bandwidth demand and object hit rate of the cache (which is related to page load time). This paper reports on the implementation and characterization of two newly proposed cache replacement policies in the Squid cache.
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