Research On Campus Resourses Integrate Technology Based On Grid

Grid development and application have a widely adoption, which enhance the utilization of the various of resources in a deep degree. How to use grid technology for campus resources integration in the campus networks, promote the efficiency and sharability of information services inter-campus and inter-school comes to a fundamental project for the campus grid researchers. By researching on the existing campus grid model and analysising the resources's characteristics of Anhui Polytechnic University (AHPU), the design and implementation of a semantic-awared campus teaching grid prototype system are presented, which meets the requirements that status quo of teaching resources in AUTS, the urgent needs of high-perfomance computing on school research, teaching in campus and puts forward the specification of building campus teaching grid.Meanwhile, according to the features of the campus resources and taking advantages of the campus net work, a solution based on semantic-awared grid services into the tradional grid application is proposed, which will eliminate resource's island and improve resource utilization. Then, two key technologies of grid computing are introduced: one is called open grid service architecture (OGSA) that represents an evolution towards a Grid system architecture based on Web services concepts and technologies. The other one is called the Globus ToolKits technology which is an open source software toolkit used for building grids comply with the OGSA specification. Furthermore, the current prevalent semantic grid reference architecture for semantic grid development is compared with each other in detailed. At the basis of above study, a Semantic-OGSA(S-OGSA)-based architecture model of the campus teaching resources is described, which makes the campus grid services are semantic-awared ones. It given embodies the subjectivity, uncertainty, dynamic and application specific in the grid more deeply and thoroughly.According to the architecture mentioned above, a set of proposals are advanced to implement the teaching grid system. The detail design aspects are described as the followings: (1) In the resource layer, for the teaching resources have the distribution and heterogeneity, they are classified in detail. At the basis of characteristics of teaching resources, semantic campus resources ontology libraries are built based on Ontology Web Language-Services (OWL-S) and the Condor-G resource integration software are used to integrate teaching resources; (2) A center job scheduling model based on feedback-based Scheduling Cache Algorithm are designed in order to achieve the core grid services layer services. The detailed design of the grid job scheduling and task monitor are given in grid sevices layer; (3) The grid GridSphere portal framework and JavaServer Faces (JSF) middleware technology are adopted to develop the user portal web services and used the agent MyProxy to achieve the security of grid user authentication management, which meet the requirement that grid portal should be a customizable and safe web service platform.At the basis of the above-mentioned solution, grounding on the AHPU campus networks, the semantic grid services are developed on the Eclipse platform and the detailed configuration for grid development is provided. Finally, the teaching grid platform is implemented. The test system is operating well, which fully indicates that a Grid Services implementation of the integrated sharing of teaching resources may achieve an effective integration of teaching resources and can improve resource efficiency, transparency and user-friendly, safe use of resources results.