基于对象复制机制的Web服务动态容错算法

Web service dynamic fault-tolerant algorithm based on object replication

文章针对Web服务应用的性能要求,在不改变算法可用性的前提下,给出一种基于对象复制的Web服务动态容错算法。它能根据副本的系统负载和网络延时情况,动态改变执行请求的副本成员数,缩短请求的响应时间,但又不过多地占用系统资源。算法分析和实验结果表明,与其它同类算法相比,文中给出的算法能够保证副本组中的每个成员状态保持一致,且具有更短的响应时间。

According to the performance requirements of Web service,this paper presents a Web service dynamic fault-tolerant algorithm without changing its availability by using object replication method.This algorithm can dynamically change the amount of duplicate members that execute request in accordance with the conditions of replica load and network delay,and reduce request response time without overspending the system resources.The algorithm analysis and experimental results show that,compared with the existing algorithms,the presented algorithm can ensure the state consistency of each member in the duplicate group and obtain shorter response time.