Job Management Research In Grid Interoperability System

With the development of science and technology, the demand for computing resources is increasely becoming greater in many fields. Single computer can hardly meet such requirement, meanwhile there are large amounts of heterogeneous and autonomous resources, which are dispersed inwide-area network, so the relation between demand, and supply is so difficult to balance that too much resources have been wasted. There has been a substantial progress in developing grid technologies in the recent years. At universities and research centers world-wide scientists work on the evolution of grid computing. Even if the way differs in many cases one of the principal goals of all those projects is the same: to give users access to distributed resources. Grid middlewares eliminate of the isolated information islands on the network. However, existing grid systems focus on specific areas of application, and these system framework and development engine are heterogeneous. Many factors lead to some new information islands amongst these grid systems.To overcome those problems described above, CSGrid (Chinese e-Science Grid) has successfully integrated CGSP(ChinaGrid Support Platform) and VEGA(VEGA GOS) through the mechanisms such as job management interoperability, information interoperability and security strategy interoperability etc. Job management interoperability, the key module in CSGrid, is to manage the whole process of using the computing resources. It smooths the differences of target systems and provides uniform grid interface and API to users. In addition, Plugin-based interoperability technology is applied to the CSGrid project. The plugin layer, between CSGrid and underlying grid systems, receives the request as uniform parameter model from client, and converts this uniform model to target-system-compatible parameter model and pass to the target job management system.It is demonstrated that grid interoperation amongst heterogeneous grid systems is feasible without any changes to these systems.CSGrid has implemented the basic function of job management interoperability, supplied a transparent interface to access heterogeneous grid systems. The experiment results show that Adaptive Resource Scheduling is lower by 13.4% than Random Resource Scheduling in the access latency.