A workflow editor and scheduler for composing applications on computational grids

A grid allows dynamic integration of disparate resources. A number of grid platforms like CONDOR, Net-Solve, ISS Cornell are available to harness computing power. However, for grid to be pervasive and usable by a novice user, integration at application level is required. We have designed and developed a scalable infrastructure to support workflow composition. The entire workflow can be saved and reused as a compound application. Our workflow engine has been designed to be independent of the underlying grid infrastructure. It has only a small layer which interfaces with the grid infrastructure. We have implemented and integrated our infrastructure with Sun Grid Engine Enterprise Edition 5.3. Applications like document search and matrix multiplication were composed. We observe increase in performance with increase in number of compute servers during experiments