| The computing infrastructure of modern High Energy Physics collaborations consists of resources that are spread across the globe and that are greatly different from one another---different batch systems, file systems, cluster configurations, etc. A Grid that unites all these resources must make these differences transparent to the user and the application being run. The work in this thesis has been done as part of the SAM-Grid project at Fermi National Accelerator Laboratory, Batavia, IL and has resulted in a system that abstracts the user application from the heterogeneities of a Grid providing user applications with a uniform working environment and one that is easily deployable and maintainable. We have used Grid middleware tools such as the Globus toolkit and other tools developed at Fermilab to create a uniform working environment at the worker node where the application is actually executed. This system has been deployed on 12 sites in 6 countries and is currently being used for running High Energy Physics applications for the D0 and CDF experiments based at Fermilab. |
