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Web caching is an important technique to scale the Internet. One important performance factor of Web caches is the page replacement policies. Due to specific characteristics of the World Wide Web, there exist a huge number of proposals for cache replacement. Furthermore, the paper discusses the importance of cache replacement strategies in modern proxy caches and outlines potential future research topics. In this paper the authors analyze effectiveness of LFU-K replacement policy for the purposes of caching on proxy servers and give the results of traces analysis taken from real proxy servers to reveal a set of properties of network traffic.
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