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《Computer Engineering and Design》 2010-01
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Web cache replacement algorithm based on prediction

HAN Xiang-chun,TIAN Yu-gen(College of Information and Engineering,Yanshan University,Qinhuangdao 066004,China)  
To improve the performance of web cache,a new cache replacement algorithm named PGDSF is proposed,which is based on the GDSF algorithm and joined the prediction mechanism.Firstly,the web log is used to construct prediction model,then prediction model is forcasted and current user access sequence to predict the target set of the prediction is formed.When the cache had not enough space to accommodate new requests,to replace the key which is the smallest key of GDSF and does not belong to the target set of pre-diction.The PGDSF algorithm takes into account factors of the target of web.The simulation shows that the current algorithm have higher percentage of hit rate and byte hit rate than the GDSF replacement algorithm in the certain cache space.
【CateGory Index】: TP393.02
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