网格信息服务的一致性研究及应用

随着开放网格服务体系结构OGSA的出现，计算网格的研究已开始向服务网格过渡，由于应用的多样性和复杂性，服务网格的研究面临着空前的挑战，当前网格信息服务系统基本上都是对计算资源、数据资源和网络资源等的管理、注册发布及资源发现，但这种方式需要做进一步的改进来适应服务网格的需要．除中国科学院计算技术研究所的VEGA之外，HowU网格平台是另一较成熟的服务网格平台．分析了HowU信息服务器的服务组织和管理机制，并重点针对信息一致性问题进行了研究，即如何保证网格范围内服务的存在性以及组织域范围内服务信息的有效性．最后给出模拟性能分析．

Consistency Research and Application for Grid Information Service

With the emergence of open grid service architecture (OGSA), service grid is seen as a natural progression from computational grid.Because of the diversity and complexity of the applications, it is a large challenge for the research on service grid platform.Currently, all the representative information service systems are basically used to provide registry, publication, and management for computing resources, data resources and network resources, etc.However such systems couldn't meet the requirement of service grid.An information service model, HowU information service, used for service management and organization is proposed in this paper.The information consistency of HowU information service is investigated with emphasis on how to guarantee service existence in grid area and service information validity in organization area.Finally the simulation and the performance analysis are given.