Content-based hierarchical Web cache

Web caches are deployed in order to quickly deliver the required information to user by placing data in proximity to users. Hierarchical Web caches are scalable, fault tolerant and enhance the degree of sharing. Typically data is either cached at each level or the most wanted data is cached at the leaf levels in the hierarchy. This strategy consumes much network bandwidth during the refreshment of data at each level and leads to poor hit ratio at upper levels by caching most popular data at leaf levels. In this paper we have proposed a content-based hierarchical Web cache. It characterizes hierarchy levels with respect to Web page contents. The highest, middle and contents respectively. A template is maintained at each level for assembling the page contents. This proposed strategy consumes less network bandwidth in refreshment and leads to moderate processing at each level. The performance evaluation also supports the hypothesis.