摘要
由于Internet和Web服务的不确定性,Web服务组合的性能难以保证。如何建模和预测系统的性能成为Web服务组合面临的难题。提出了一种新颖的性能仿真模型STPM+,能够同时支持对时间和非时间度量的建模和仿真。基于随机时间着色Petri网,STPM+模型能够仿真和预测多种服务质量,如成本、可靠性、信誉等。一个可视化的性能仿真工具Visual WSCPE被设计实现用来检验模型的有效性。基于Visual WSCPE的实验验证了此模型的可行性和有效性。
Due to the uncertainty of the Internet and web services,the performance of web services composition cannot be ensured.How to modeling and predict its performance becomes a difficult problem for the web services composition.We propose a novel performance simulation model for WSC,called STPM＋,which can support modeling and simulating time and non-time QoS metrics.Tthe STPM＋ model can simulate and predict multiple QoS metrics,such as cost,reliability,reputation,and so on.To examine the validation of this model,we have designed and realized a visual performance simulation tool,called VisualWSCPE.Based on VisualWSCPE,we have fulfilled some simulation experiments.The experiment results demonstrate the feasibility and efficiency of this model.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第20期6-10,共5页
Journal of Wuhan University of Technology
基金
863计划基金(2007AA01Z138)
湖北省自然科学基金(2008CDZ088)
襄樊市科技攻关计划基金(2008GG1C41)
关键词
WEB服务组合
服务质量
仿真
性能分析
web services composition
quality of services
simulation
performance analysis
