Research Of The Function And The Information Decoupling Technology Based On Information Grid

As the third technology wave, Grid develops very fast with the internet technology,and it has the ability to cover globe, providing users with plump resources. As one ofthe applications, Information Grid stresses information storage, management,transmission and processing. Information Grid system provides users services that areone click is enough and transparent. The users do not need to know the information ofresources like the source and the location, and they can also call for the resources. Thechange of underlying information resources does not affect the use of users. InformationDecoupling is the important technology to achieve transparent service. Meanwhile,Information Grid allows the users to choose the services they need, Decouplingtechnology must be used between all the services and remove the stiffness relationbetween all the functional modules, then the on-demand service and flexiblerestructuring can be achieved.By the analysis of the grid service architecture, and combine the feature of theInformation Grid resources, this thesis proposes that the singular structure property,distributed property, dynamics property and the great quantity property must be deletedto achieve the information decoupling, then the users and the application system couldconnect the information resource seamless. Base on the analysis to the popularinformation description language, against the feature of information grid resource that isflexible richness, this thesis proposes a method that the metadata, XML technology andthe metadata directory services should be linked up to describe and storage informationgrid resources, in order to avoid the effects that the information resource’s singularstructure property made to the grid system. Through the data mapping between differentlevels, the hierarchical metadata model avoids the effects to the grid that produced bythe geographical distribution of resource and the changing location. The auto adaptresource form structure which base on the tree-form avoids the effects to the Grid thatproduced by the dynamic add and quit of resource. In order to achieve the servicefunction module decoupling, this thesis proposes a service model likediscovery-find-bind，in this model service and user can change their part to each other without effects, when used, it builds dynamic binding relationships. This thesis buildsmodels of the service aggregation framework and the service aggregation process, and italso studies the dynamic selection algorithm and the matching algorithm of service,what provide technology support to the on-demand service.Finally, it builds a typical application grid system which bases on the flood relief,this system simulates the service discovery and the service aggregation etc. This thesisvalidates the key technologies which were used during the decoupling.