二维多层次的云服务可靠性评估方法研究

针对云服务业务流程管理的特点, 给出了云服务的组合实现框架; 依据随机Petri网的建模理论, 探讨了组合云服务流程网模型的细粒度建模方法; 根据动态多变的用户需求, 设计了二维多层次的云服务组合可靠性动态评估框架, 并给出了马尔可夫过程和等值约简的两种可靠性计算方法。应用示例分析结果表明, 该方法具有较好的动态适应性和灵活性, 能有效满足云服务的可靠性评估需求。

Research on two-dimensional and multi-levels reliability evaluation method of cloud service

In allusion to the characteristics of the business process management, this paper provided an implementation framework of composite cloud service. Based on the theory and modeling methods of stochastic Petri nets, it discussed the methods for the transformation from the BPEL business process to the composite cloud service process net model. In view of the idea of SOA and the dynamic changeable requirements, it designed a two-dimensional and multi-levels reliability evaluation framework of cloud service composite, and introduced the reliability analysis method based on Markov process and the reliability dynamic assessment method based on equivalent reduction. The application example analysis results show that the method is more dynamic adaptability and flexibility, which can effectively meet the reliability evalution of the cloud service demand.