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Publications by Type: Conference and Workshop Publications

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Performance of Web proxy caching in heterogeneous bandwidth environments
Zitatschlüssel FCDGR-PWPCHBE-99
Autor Rabinovich, Michael and Feldmann, Anja and Caceres, Ramon and Douglis, Fred and Glass, Gideon
Buchtitel INFOCOM'99: Proceedings of the Eighteenth Annual Joint Conference of the IEEE Computer and Communications Societies
Seiten 107–116
Jahr 1999
ISBN 0-7803-5417-6
DOI http://dx.doi.org/10.1109/INFCOM.1999.749258
Ort New York, NY, USA
Jahrgang 1
Monat March
Zusammenfassung Much work on the performance of Web proxy caching has focused on high-level metrics such as hit rates, but has ignored low-level details such as cookies, aborted connections, and persistent connections between clients and proxies as well as between proxies and servers. These details have a strong impact on performance, particularly in heterogeneous bandwidth environments where network speeds between clients and proxies are significantly different than speeds between proxies and servers. We evaluate through detailed simulations the latency and bandwidth effects of Web proxy caching in such environments. We drive our simulations with packet traces from two scenarios: clients connected through slow dialup modems to a commercial ISP, and clients on a fast LAN in an industrial research lab. We present three main results. One, caching persistent connections at the proxy can improve latency much more than simply caching Web data. Two, aborted connections can waste more bandwidth than that saved by caching data. Three, ''cookies'' can dramatically reduce hit rates by making many documents effectively uncacheable.
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