【摘要】 随着Internet的日益发展,Web集群技术越来越受关注,作为集群技术的关键技术之一——QoS控制,关系到集群的性能和易用性。研究了ASAS集群的QoS控制的3种策略:绝对优先级分配策略、阈值优先级分配策略和时间加权分配策略,并以Petri网理论为工具,比较各种控制策略的优越性,得出了各种策略的优缺点。更多还原

【Abstract】 With the development of the Internet,the technology of web cluster is being more and more widely focused.As one of the key technology,QoS control is related the performance of the web cluster.Three distribution strategies of QoS control for ASAS cluster-utter PRI distribution strategy,value PRI distribution strategy and time-waited proportion distribution strategy are researched.On the foundation of the Petri net theory,a comparison is made among different distribution strategies,and thus the advantages and disadvantages of each distribution strategy are found out.更多还原