摘要
请求负载的增加常常导致Web服务器系统性能降低,用户期望的服务质量得不到保证,这是服务级Web系统所面临和必须解决的问题。文章提出了一种Web服务器集群环境下的负载分配策略,通过对用户请求分类、将不同类别的请求进行响应性能隔离、优先为高级别请求提供服务以及请求许可控制等手段,对不同类别的Web请求提供不同质量的服务,保证了服务级用户的服务质量。同时采用最迟分配原则,改善系统的负载均衡能力,缩短系统平均响应时间。最后通过仿真实验,验证了该策略的正确性和有效性。
The augment of requests often results in the performance degrade of the web server system.The quality of service(QoS)expected by users can not be guaranteed.This is the problem that service-level web system must cope with.In this paper,a load distribution strategy under web cluster environment is proposed.Through several methods in-cluding classification of the user requests,response performance isolation of different types of requests,priority service for the high-level requests and request admission control,the different quality of web service can be reached and the QoS of service-level users is guaranteed.Also according to latest distribution rule,the load balance of the system is im-proved,and average response time of the system is decreased.Lastly simulation experiments prove the correctness and efficiency of this strategy.
出处
《计算机工程与应用》
CSCD
北大核心
2003年第36期125-127,共3页
Computer Engineering and Applications
基金
重庆市科技攻关项目(编号:2001.6715)
