Service-Oriented Integration of Grid Applications in Heterogeneous Grids

Abstract

Open Grid Service Architecture (OGSA) is an architectural model for service-oriented Grids. During the years, OGSA domineer as Grid architecture for building Grid systems and it tightly hold SOA principles. However, we can not claim that OGSA is supported by every Grid environment. On contrary, the development of OGSA as Grid standard is not finished yet, and many Grid environments do not implement it. The heterogeneous Grids use different technologies and protocols to provide services for access to Grid resources. Some of them are not service-oriented, others are fully or partially. This is causing problems for developers of Grid applications, who have to use different approaches to access the different Grids. Moreover, from the users’ point of view, it is very difficult to use simultaneously resources from these different types of Grids. If we do not take into account the different security policies that every Grid implements, there is no unified way to access Grid services or to integrate them. Solution of the problem is SOA. In this article we present our service-oriented approach for integration. For test purpose we use Grid middleware Globus Toolkit 4 and g-Lite.