摘要： 开放网格服务体系结构OGSA提出了网格服务的概念，为网格资源的虚拟化管理给出了一条有效途径。当前网格系统对于网格服务的支持主要集中在服务的功能发现与调用部分，缺乏对服务的非功能属性的管理支持。服务的非功能属性如服务的响应时间、价格、可靠性等对于用户来说非常重要，体现着用户对网格服务的QoS需求。基于QoS的服务选择机制能够对网格服务的QoS模型进行管理和度量，对于用户提出的QoS需求，服务匹配算法能够为用户选择满足需求倾向的服务。

关键词: 网格服务, 服务质量, 服务选择, 服务匹配

Abstract: Grid service concept is introduced by open grid service architecture, which supplies an effective way for virtual management of grid resource. Current research focuses on grid service discovery and invocation, while lack mechanism for managing non-functional properties of grid service. The non-functionality properties of grid service, such as service response time, price and reliability, etc., are very important, which reflect user’s respective QoS requirement for grid service. A QoS-based service selection mechanism is proposed to have the QoS model of grid service managed and evaluated. For QoS requirement of user, service match algorithm provides help to select the service which satisfies user’s requirement preference.

Key words: Grid service, QoS, Service selection, Service match