Design And Implementation Of A Web Cache And Prefecthing System

With the rapid growth of information and users in Internet, network bandwidth hasnot been able to satisfy the user’s service request. How to effectively reduce user’s accesslatency, improve the quality of service as a Web urgent has become a problem needs to besolved. Web caching and prefetching technology is an effective solution for the problem,cache replacement algorithm has been improved based on the the properties of Web accessand users’ interests and the combination of Web caching and prefetching techniques caneffectively improve the hit rate of the cache system, improve the network performance.Most existing Web cache replacement policies only considered the costs of gettingWeb object itself and because of the single factor it results in a lower cache hit rate. Thepaper first analyzes the characteristics of the user’s Web access behavior and interests.Then we propose a new Web Cache replacement policy GDSFI based on the GDSFalgorithm and verify its performance and comparison through simulation results.Web prefetching is an effective complement of caching technology. We can completethe next Web object request during the browsing time by prediction of the behavior of theuser.Through the access log we can get the list of most popular Web in hot fields whichcould be used to prefetch Web object. Prefetching and caching should be combined witheach other inorder to achieve higher performance cache.Integration of Cache and Prefetch can effectively improve the cache hit rate andimprove the network performance and quality of service.