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Web集群服务器可用性的提高
引用本文:张永忠,赵银亮,宋敬彬,董小社,李增智. Web集群服务器可用性的提高[J]. 计算机工程, 2006, 32(8): 121-123
作者姓名:张永忠  赵银亮  宋敬彬  董小社  李增智
作者单位:西安交通大学计算机科学与技术系,西安,710049;西安交通大学计算机科学与技术系,西安,710049;西安交通大学计算机科学与技术系,西安,710049;西安交通大学计算机科学与技术系,西安,710049;西安交通大学计算机科学与技术系,西安,710049
摘    要:以Web集群服务器的后端节点作为研究对象,通过减少后端节点的MTTR(Mean Timeto Repair),来提高它们的可用性,从而提高整个集群服务器的可用性。首先,通过分析现有的故障恢复方案的不足,提出了新的改进方案,在新的方案中,采用了动态地检测和发送状态信息的策略。并引入了故障猜测状态,弥补了现有方案的不足。最后设计了一个试验环境,与现有的方案测试相比,使用改进的方案,MTTR(平均敞障修复时间)减少了63%,很好地提高了后端节点的可用性。

关 键 词:可用性  Web集群服务器  故障检测  故障恢复
文章编号:1000-3428(2006)08-0120-03
收稿时间:2005-04-27
修稿时间:2005-04-27

Improvement of the Availability of Cluster-based Web Server
ZHANG Yongzhong,ZHAO Yinliang,SONG Jingbin,DONG Xiaoshe,LI Zengzhi. Improvement of the Availability of Cluster-based Web Server[J]. Computer Engineering, 2006, 32(8): 121-123
Authors:ZHANG Yongzhong  ZHAO Yinliang  SONG Jingbin  DONG Xiaoshe  LI Zengzhi
Abstract:In research,back-end nodes in the cluster-based Web server are took as the research object.The research goal is to improve the availability of the back-end nodes by reducing their MTTR(mean time to repair).In this paper,firstly,new scheme is put forward on the basis of analyzing of the shortage of the current failure recovery scheme.In the new scheme,state messages of back-end nodes are detected and sent dynamically and failure suspicion state of back-end nodes is introduced,all of them are used to remedy the shortage of existed scheme.Secondly,an experimental environment is developed to test the researching result.The experiment result shows that MTTR decreases 63% in the scheme as compared to the existed one,which leads to the improvement of the availability of the back-end nodes,and then the availability of cluster based Web server is improved.
Keywords:Availability   Cluster-based Web server   Failure detection   Failure recovery
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