Deployment of SAM for the CDF Experiment

CDF is one of the experiments at the Tevatron at Fermilab. One dominating factor of the experiments’ computing model is the high volume of raw, reconstructed and generated data. The distributed data handling services within SAM transport these data for physics analysis applications. The SAM system was already in use at the D-Zero experiment. Due to difference in the computing models of the two experiments some aspects of the SAM system had to be adapted. We will present experiences from the adaptation and the deployment phases. This includes the behavior of the SAM system on batch systems of very different sizes and types as well as the interaction between the datahandling and the storage systems, including disk pools and tape robot systems. In particular we will cover the problems faced using large scale compute farms. To accommodate the needs of Grid computing, CDF deployed installations consisting of SAM for datahandling and CAF for high throughput batch processing. The CDF experiment already had experiences with the CAF system. We will report on the deployment of the combined system.