Document replacement policies dedicated to Web caching

Web caching has been considered as a powerful solution to deal with the growth of Web traffic. Several studies have shown that caching documents throughout the Internet can save network bandwidth and reduce document access latency. However, this technique has introduced new problems such as maintaining the document coherency and selecting the next document to be removed. With the continuous increase in demand for documents, the Web cache servers are becoming the new bottleneck. A need for better resource management is becoming urgent in order to reduce the overhead sustained by Web cache servers. In this paper, a number of Web replacement policies are discussed and compared on the basis of trace-driven simulations. The impact of the Web cache server configuration is pointed out through a set of experiments that use the cache size as a tuning parameter