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Summary: 17th ACM Symposium on Operating Systems Principles (SOSP '99)
Published as Operating Systems Review 34(5):16--31, Dec. 1999
On the scale and performance
of cooperative Web proxy caching
Alec Wolman, Geoffrey M. Voelker, Nitin Sharma,
Neal Cardwell, Anna Karlin, and Henry M. Levy
Department of Computer Science and Engineering
University of Washington
fwolman,voelker,nitin,cardwell,karlin,levyg@cs.washington.edu
Abstract
While algorithms for cooperative proxy caching have been
widely studied, little is understood about cooperative
caching performance in the largescale World Wide Web en
vironment. This paper uses both tracebased analysis and
analytic modelling to show the potential advantages and
drawbacks of interproxy cooperation. With our traces, we
evaluate quantitatively the performanceimprovement po
tential of cooperation between 200 smallorganization prox
ies within a university environment, and between two large
organization proxies handling 23,000 and 60,000 clients, re
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