“Grid” computing has emerged as an important new field, distinguished from conventional distributed computing by its focus on large-scale resource sharing, innovative applications, and, in some cases, highperformance orientation. A grid is a form of multiple computer system. For solving computational problems, it could be viewed as the next step after cluster computing, and the same programming techniques used. We review the “Grid problem,” which we define as flexible, secure, coordinated resource sharing among dynamic collections of individuals, institutions, and resources—what we refer to as virtual organizations. In such settings, we encounter unique authentication, authorization, resource access, resource discovery, and other challenges. It is this class of problem that is addressed by Grid technologies. A web-based application server enhanced with the necessary software to communicate to grid services and resources. It provides application scientist a customized view of software and hardware resources from a web browser. Here to built high performance computing immerging GRID PORTALS uses a Web browser interface It hides details of Grid middle ware.It is powered by Functions such as access to grid information, access to grid services, automated execution of applications / jobs, workflow management, file management Remote job management, job submission, workflow management.

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