Co-existence of Cloud and Grid: A Case Study in Service Oriented Grid GARUDA

In this paper we discuss how a Cloud Computing offering can co-exist in the GARUDA infrastructure. GARUDA is now an established Grid, having undergone two phases of evolution. Providing Cloud Computing support is essential to increase the outreach of Grid to more application developers and users. Grids may rely on private networks, whereas Clouds rely on Internet and the Service-oriented Architecture. We describe how GARUDA differs from a Cloud, and propose the structural changes required in GARUDA in order to support Cloud, while at the same time servicing the current Grid Computing users. So, we suggest an architecture that allows GARUDA to be viewed as Grid by some users, and as a Cloud by the others.