一种新的面向广域Web服务器集群的动态负载平衡算法

由于地理意义上的分散性和系统的动态变化性,群集间的负载分配成为了一个棘手的问题.首先给出了一种多量纲参数的融合策略,然后提出了一种动态负载平衡算法.通过对广域Web服务器集群环境建立数学模型,设计并实现了试验平台.仿真结果表明,该算法可以满足系统的负载平衡需求,因此较大程度地减少重定向引起的延时以及提高系统的准入概率.

Research on the Load Balance Strategy of Web Server Clustering

The exponential growth of the Intemet coupled with the increasing popularity of dynamically generated content on the World Wide Web,has created the need for more and faster Web servers capable of serving the over 100 million lntemet users. Server clustering has emerged as a promising technique to solve the problem. In this paper,, the defects of the existing Web Server Clustering technologies are summarized firstly, To attain the goal of keeping the balance of the server cluster, an syncretic strategy is advanced for hybrid heterogeneous parameters, through which a load-assignment algorithm is presented. A testbed is implemented by modeling the Web Server clustering. The simulation result shows that the presented scheme can guarantee the load balance and thus can provide better QoS guarantees.