网格环境中一种有效的Web服务资源组织机制

Web服务资源的有效组织与获取是网格计算中的关键性问题．基于OGSA(open grid service architecture)框架提出了一种有效的网格Web服务资源组织体系模型，它将Web服务资源的逻辑结构与物理资源组织分开，以层次结构的Web服务解析系统(Web services name system，WSNS)来进行Web服务资源查找与定位，以区域自治系统(area autonomy system，AAS)来进行Web服务资源的维护．详细描述了该模型的实现机制、组织协议与数据结构．通过对模型的分析和对原型系统的模拟表明该模型是合理而有效的：它可以在较小开销下获得较满意的资源组织与定位性能，能适应网格Web服务资源的异构、复杂与动态性、多级的负载平衡和良好的可扩展性．’

An Effective Organizing Mechanism for Web Services Resource in Grids

Effectively organizing and obtaining the resources of Web services is a critical problem in grid computing.Based on OGSA(open grid service architecture), an effective model for the grid Web service resource organization is presented.The new model separates the logical structure and the physical resource organization of the Web services and uses the hierarchical WSNS(Web services name system) to search and locate the resources of Web services, which are maintained by AAS (area autonomy system).In addition, the organizing protocol and data structures required for implementing the model are discussed in detail.Theoretical analysis of the model and simulations of the prototype system show that the model is reasonable and effective in that it has a good performance of resource organization and location with low cost, good adaptability in heterogeneous, complex and dynamic environment and high scalability for the resources of grid Web services.