用Monte Carlo模拟方法评估Web Services系统的可靠性

Using Monte Carlo Simulation to Evaluate the Reliability of Web Services Systems

现有文献很少考虑到Web Services系统(WSS)这类具有随机并行度的多用户系统的可靠性问题.本文在为WSS建立一个基于体系结构的随机服务系统模型的基础上,提出一种模拟的解决方法及其实现系统Simurel.通过引入运行概图和失效概图,Simurel取得了良好的可应用性,可以用于一般性的基于体系结构的可靠性评估,不论是多用户或单用户系统.实验结果表明,Simurel的运行性能良好.

The current research work considered nothing explicitly about the reliability problem for the multi-user system of random degree of parallelism,such as the Web Services system (WSS) .By modeling WSS as architectural random server system,this paper proposes a simulation-based approach and its implementation system, Simurel. Making use of execution profiles and failure profiles, Simurel reveals good applicability and generalization. It can be used to solve architecture-based reliability assessment in a general way, no matter single-or multi-user. The results of several experiments indicate that Simurel bears good runtime performance.