Study And Application On A Meta-information Management Mechanism In Service Grid

With the development of the Web service, the presentation of grid breaks a new path for enterprises'flexible compositions. The purpose of grid is to implement the overall sharing of resources on Internet and eliminate the island of information completely. With the advance of grid, service grid is the new concept combining Web service and grid. And it provides a virtual register of resources and realizes self-control intelligently, which makes the function and format of Web service more plentiful and satisfies personal requirements much more.Because of the popularity of service grid and the increase of grid services, it is crucial to resolve the problems including how to organize so many grid services and how to make users discover appropriate services. A mechanism is needed to manage services uniformly and supply a dynamic reflection of grid environment. Such is meta-information management mechanism. In this paper, present UDDI in the way of querying, storing, security, and so on are improved in order to enhance the ability of discovering appropriate grid services with high performance efficiently and real-time monitoring the dynamic information of services. A multi-level meta-information management mechanism to manage grid services on registering, discovering and monitoring is proposed.First, we have carried out deep analysis and research into current meta-information management mechanisms and have presented a new layered one which realizes management for service resources efficiently in this paper. The mechanism enforces classified management for grid services according to their different functions. And they can be classified into two classes:resource service and collective service. Based on the distributed idea, we classified the meta-information management mechanism into three levels. The layered architecture can enhance the efficiency of inquiring services greatly and has some characters including distribution, reliability and extensibility etc.According to the semantic information and services'descriptive information, an intelligent solution of discovering the most matching services in function and selecting the best service from them in performance is also addressed. This process can be divided into three parts:Firstly, both the information of services and the requests of users should be converted to a standard form of system. Secondly, the appropriate organization and domain where the service is located can be determined and we can find the services that satisfy the users'requirements in functions. Finally we can select the most matching services according to a matching algorithm of restriction.By the use of this meta-information management mechanism presented in this paper, we have validated the feasibilities of some information management policies.