随着网格技术和应用的不断发展,一些关键领域或业务应用场景要求网格系统提供更好的服务质量(QoS),而具有较高可管理性的服务管理策略可以在提供较高服务质量的同时减小系统的开销.文中提出了网格服务的干扰和可管理性的形式化描述及量化计算方法,并建立了描述干扰发生过程的网格系统随机Petri网(SPN)模型.之后文章对服务管理策略进行了分类研究,并根据SPN模型的仿真计算结果,对各类策略对网格服务的干扰情况的影响以及对网格服务可管理性的量化评价结果进行了比较和分析,为具有高可管理性的策略的设计提供依据.
With the development of Grid technology and Grid application, higher requirements are imposed on the efficiency and quality of the grid system. And the service management is a necessary method to improve quality of service (QoS). In this paper, the definition and formalized description of Grid service churn and manageability are proposed. And a stochastic Petri net (SPN) model is upbuilt to describe the process of Grid service with churns. On the other hand, service management strategies are classified and researched. According to the computing results of SPN model, the influences of these strategies to churn and the quantifying results of manageability are analyzed. This paper can provide the reference to actual application.