Abstract
with the fact of rapid development of the World Wide Web, the web usage has imposed a heavy load on the network and server infrastructure, and significant delays are not uncommon. To mitigate the effects of these increased usages, there has been much research and work in web caching. Web caching reduces network load, server load, and the latency of responses. However, one main disadvantage of web caching is that a stale page might be returned to clients if the origin version has changed and there is no consistency mechanism to maintain. In this paper, we present a survey of contemporary cache consistency mechanisms in use on the Web today and examine recent research in web cache consistency. In addition, we analyze the performance of each algorithm of caching consistency using communication traffic model in details.
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