WEB服务器集群系统中负载平衡的设计与实现

在In ternet和In tranet上,随着客户机数量和密集性任务的增加,单个W eb服务器受到处理能力的限制,已经成为网络访问的新瓶颈。如果W eb服务器集群系统具备高可用性和负载平衡性将成为解决这一问题的最佳方法。本文重点研究了服务器集群负载平衡的原理和实现技术。文中用排队论的方法分析集群系统的性能,通过对服务器负载性能数据的实时采集和对轻载服务器的周期性判决做到动态的负载平衡。测试结果表明,本文提出的负载平衡方法应用于W eb服务器集群系统中,其吞吐量提高了30%以上。

Design and Implementation of Load Balancing in Web Server Cluster System

With the increase of users and dense tasks in Internet and Intranet,the transacting capability of the single Web server is limited,which has already become the new bottleneck of network visiting.If the Web server cluster is equipped with the features of high availability and load balancing,it becomes the best solution for the preceding problem.This paper attaches importance to the principle and the implementation technology of load balancing in the Web server cluster system.The performance of the Web server cluster system is analyzed with the queue theory,and dynamic load balancing is implemented with real-time collecting performance data of the Web servers and periodical judging of light loading Web servers.Experimental results show that the throughput of the Web server cluster system is increased by 30% with the load balancing method.