【摘要】 随着网格服务应用的发展,在网格工作流中,复杂的任务可以由多个独立的服务,通过工作流引擎等方式组合成新服务后完成。在组合服务的过程中,由不同服务提供商提供的候选服务,具有不同的服务质量参数,在网格工作流调度中,需要满足用户定义的服务质量约束。提出了方便用户定义的服务质量模型,并且在该模型的基础上,改进了网格工作流调度算法,通过实验分析证明改进后的算法优于传统的调度算法。更多还原

【Abstract】 As the development of the grid service application,complex tasks in grid workflow can be finished by combining indi-vidual services into a competent composite service.In the services composition,candidate services are provided by different providers with different non-functional Quality of Service(QoS) attributes,the grid service scheduling needs to guarantee that the composite service can meet the users QoS constrains.This paper presents a customized QoS model and improves the GA-based grid service scheduling algorithm.Experiment results prove it available and better than the traditional algorithms.更多还原