网格信息服务初探

The primary study on the grid information service

信息服务是网格系统提供给各类用户以满足需求的主要功能。由于信息资源的需求者与提供者分布在不同地域或不同节点上,二者是非透明状态下的,不均衡的“多对多”关系,因此,需要网格信息服务。数据网格和信息网格是网格信息服务的基础;SOA的优势在于其高度的可复用性、灵活性、可靠性和更好的可扩展性;Web服务描述了一种基于标准技术的新型分布式计算范例,并提供应用程序的接口WSDL。在Web协议的支持下,就可以为信息获取、信息提供、信息管理等提供基本操作,实现网格信息服务的功能。

The main function of the grid systems that can provide for all kinds of users is information service. The grid information service is necessary when the user and information resource provider locate at different zones or nodes, and the system is unbalanced many- to- many relationship and non- transparent for them. Data grid and information grid are the bases of grid information service. SOA has the advantages of high- reusability, agility, reliability and expansibility. Web service demonstrates a new distributing compu- ting paradigm based on standard technology, and provides the port WSDL of application program. Web service can realize the function of grid information by providing the fundamental operation for information extraction, information providing, information management etc under the supporting of Web protocol.