计算机工程与应用 ›› 2010, Vol. 46 ›› Issue (32): 1-5.DOI: 10.3778/j.issn.1002-8331.2010.32.001

• 博士论坛 • 上一篇    下一篇

增强多目标遗传算法下的组合服务的容错能力

蔡美玲1,2,陈继锋1,2   

  1. 1.湖南涉外经济学院,长沙 410205
    2.中南大学 信息科学与工程学院,长沙 410083
  • 收稿日期:2010-07-23 修回日期:2010-10-18 出版日期:2010-11-11 发布日期:2010-11-11
  • 通讯作者: 蔡美玲

Enhance fault-tolerant ability of Web services composition under multi-object genetic algorithm

CAI Mei-ling1,2,CHEN Ji-feng1,2   

  1. 1.Hunan International Economics University,Changsha 410205,China
    2.Institute of Information Science and Engineering,Central South University,Changsha 410083,China
  • Received:2010-07-23 Revised:2010-10-18 Online:2010-11-11 Published:2010-11-11
  • Contact: CAI Mei-ling

摘要: 利用多目标遗传算法得到一组满足约束条件的最优非劣方案集,用户根据实际需要从中选择满意的组合方案,同时,未被选择的流程作为备选方案以便发生意外时替代执行。提出了最优非劣方案的失效成功率和基本服务的相容性计算方法,选择可用性高且失效成功率较高的组合方案,以便执行发生意外时组合服务有较高的概率成功切换到备选方案继续执行,增强了组合服务执行的容错能力。实验结果说明了该方法的可行性和有效性。

关键词: Pareto解集, 容错, 组合服务, 多目标遗传算法

Abstract: Pareto-based multi-object genetic algorithm for Web services selection achieves a set of pareto solutions which meet constraints,then the most approving solution is selected as the final decision project according to users’ requirements.At the same time,the solutions not chosen can be reserved as potential options in case of the failure while running.In this paper the calculating method of tolerability for pareto solutions and compatibility for basic service is proposed.The tolerability is provided as an evaluation index for selecting the final decision solution,where the higher availability and tolerability,the more probability it will be selected.Then more backup process can be switched in case of the running process occurring failure.Therefore fault-tolerant ability of Web services composition at run-time is enhanced.The experimental results indicate the feasibility and efficiency of this algorithm.

Key words: Pareto solutions, fault-tolerant, Web services composition, multi-object genetic algorithm

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