SAM-GRID: A system utilizing grid middleware and SAM to enable full function grid computing

We present a grid system, which is in development, employing an architecture comprising the primary functional components of job handling, data handling, and monitoring and information services. Each component is built using existing Grid middleware. The Job handling utilizes Condor Match Making Services to broker job submissions, Condor-G to schedule, and GRAM to submit and execute jobs on remote compute resources. The information services provide strategic information of the system including a file replica catalogue, compute availability; and network data-throughput rate predictions, which are made available to the other components. Data handling services are provided by SAM, the data management system built for the Dzero experiment at Fermilab, to optimize data delivery, and cache and replicate data as needed at the processing nodes. The SAM-Grid system is being built to provide experiments in progress at Fermilab the ability to utilize worldwide computing resources to process enormous quantities of data for complex physics analyses.