Distributed Web caching allows multiple clients to quickly access a pool of popular Web pages. Conventional dis- tributed Web caching schemes, e.g., the Internet cache protocol and hash routing, require the sending of many query messages among cache servers and/or impose a large load on the cache servers when they are widely dispersed. To overcome these prob- lems, we propose a hash-based query caching method using both a hash function and a query caching method. This method can find cached objects among several cache servers by using only one query message, enabling the construction of an efficient large- scale distributed Web cache server. Compared to conventional methods, this method reduces cache server overhead and object retrieval latency.
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