The Research Of Web Cache Model Based On Object Replacement And Prefetching

With the rapid development of Internet technology, network access information on thenumber of users and amount of content increased dramatically, the Internet has to penetratedeep into all aspects of daily life, the more profound impact on people’s production and livinghabits. However, due to a variety of multimedia content in the proportion gradually increasednetwork resources, limited network bandwidth tends to increase the latency, while networkquality of service is not high, and the user experience is severely affected. Therefore webcaching technology and web prefetching techniques arises, both of them can greatly improvenetwork bandwidth utilization and reduce the throughput capacity of the network gateway,thus reducing access latency and improve network service experience.This paper described the basic concepts of web caching and web prefetchingtechnologies, and then combined both of them to form a web cache model. In this model, thecaching module is the GDSF-CF algorithm, while the prefetching module is based on the useraccess patterns.The list of main research is as follow:Firstly, this paper researched some existing web cache replacement techniques andcollaborative filtering recommendation technologies, then designed a web cache replacementalgorithm which is based on collaborative filtering, named GDSF-CF(Greedy Dual SizeFrequency Collaborative Filtering). This algorithm using collaborative filtering techniques topredict the visits frequency of web objects, with considering other factors, we formed aequation about caching value of web objects. In the process of replacement, firstly we usingthe equation to generate the caching value of web object, then comparing the value of eachweb object and replace the value of the smallest one. By using this algorithm we can improvethe performance of web server.Then, this paper proposed a web cache model, which is based on web caching andprefetching algorithm, named MGP. The MGP model can improve the performance of cachingalgorithms, while reducing the users web access latency.Finally, Through the simulation experiment, this paper compared the HR, BHR, RHRand WBRV of each algorithm, confirmed the GDSF-CF algorithm and MGP, model has betterperformance than other algorithm.