Decision function in hybrid self-adaptive WWW cache coherence protocol (hSATTL)

Proxycaches in classical server-client architecture may decrease the amount of data transfer and reduce network congestion, but they also impose a cache-coherence problem. Objects replicated in proxy caches must be kept coherent. Although various protocols for maintaining cache coherence in the World Wide Web (WWW) have been introduced, there does not exist a highly efJicient solution to the coherence problem.We have designed a new hybrid self-adaptive protocol (hSAiTL) for maintaining cache coherence. The protocol dynamically switches between three basic cache coherence mechanisms: server-oriented writeinvalidate, server-oriented write-update, and proxyoriented time-to-live (TTL). We describe the implementation of the hSATTL protocol and compare it to other currently used protocols. In order to perfarm measurements, we also develop a special software package. As a performance measures, we use the level of coherence maintained by the protocols and the amount of network traffic generated by the protocols in order to maintain cache coherence.

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Hybrid self-adaptive WWW cache coherence protocol (hSATTL): improving the coherence of WWW objects

Stefanec

Benc²,

Srbljic³

EUROCON'2001. International Conference on Trends in Communications. Technical Program, Proceedings (Cat. No.01EX439)

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Decision function in hybrid self-adaptive WWW cache coherence protocol (hSATTL)

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Hybrid self-adaptive WWW cache coherence protocol (hSATTL): improving the coherence of WWW objects

Hybrid self-adaptive WWW cache coherence protocol (hSATTL): improving the coherence of WWW objects

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