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SIGCOMM
1996
ACM

Removal Policies in Network Caches for World-Wide Web Documents

11 years 4 months ago
Removal Policies in Network Caches for World-Wide Web Documents
World-Wide Web proxy servers that cache documents can potentially reduce three quantities: the number of requests that reach popular servers, the volume of network trac resulting from document requests, and the latency that an end-user experiences in retrieving a document. This paper examines the rst two using the measures of cache hit rate and weighted hit rate (or fraction of client-requested bytes returned by the proxy). A client request for an uncached document may cause the removal of one or more cached documents. Variable document sizes and types allow a rich variety of policies to select a document for removal, in contrast to policies for CPU caches or demand paging, that manage homogeneous objects. We present a taxonomy of removal policies. Through trace-driven simulation, we determine the maximum possible hit rate and weighted hit rate that a cache could ever achieve, and the removal policy that maximizes hit rate and weighted hit rate. The experiments use ve traces of 37 t...
Marc Abrams, Charles R. Standridge, Ghaleb Abdulla
Added 08 Aug 2010
Updated 08 Aug 2010
Type Conference
Year 1996
Where SIGCOMM
Authors Marc Abrams, Charles R. Standridge, Ghaleb Abdulla, Edward A. Fox, Stephen Williams
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