集群服务器的性能分析与研究-软件工程专业论文.docx

ABS弭认CTIt ABS弭认CT It is a networking．centered information era and people pursue faster access,more reliable and more functional information services．弧e increasing popularity of the World Wide Web leads to all exponential growth of Interact usage．(h氇e other hand， the excessive increase of traffic on the World Wide Web makes it hard tO predict the increase in client request tO popular Wbb sites．Site managers have to face the problem tO improve server capacity．Therefore，the Intemet research community encounters a number of challenges of evaluating server performance and of providing a series of high-performance technology for designing W曲server to enhance W曲QOS．The performance evaluation ofcluster Web scllver addressed in this paper is a step towards ameliorating Web QOS． The main tOpics of this paper are cluster Server architecture research，web server workload charaetoristie analysis，servcq-capacity analysis and request辩确锣 scheduling．Firstly,after studying current cluster web server architecture，we present a novel model of cluster server performance analysis--CWSS(Cluster Web Server Structure)model，which is based on open queuing network model．Some server performance related information could be obtained by applying the model to simulation analysis，for example the relationships among server performance，server architecture，implementation policy and server worldoad．Secondly,we analysis in a deep-going way locality and whole characteristic，of server load，which iS a base of server software realizable technology．So there ale important practical and theoretical significance to accurately evaluate the variation of server 10ad。Thirdly, this paper introduced the concepts concerning server capacity and discussed capacity planning＆testing．A prediction model ofadequate capacity Was proposed by 109istic rule，which is a cursory quantitative analysis model．We use this model to predict server size and forecast workload．Finally,by analyzing relationship among response time，client reque