Fermilab Computing Division

CS Document 501-v2

Experience producing simulated events for the DZero experiment on the SAM-Grid

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Marcia A Teckenbrock
Updated by:
Marcia A Teckenbrock
Document Created:
20 Sep 2004, 15:10
Contents Revised:
23 Sep 2004, 14:45
Metadata Revised:
20 Jan 2005, 10:23
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23 Sep 2004, 14:21
20 Sep 2004, 15:10
Most of the simulated events for the DZero experiment at Fermilab have been historically produced by the "remote" collaborating institutions. One of the principal challenges reported concerns the maintenance of the local software
infrastructure, which is generally different from site to site. As the understanding of the community on distributed computing over distributively owned and shared resources progresses, it becomes increasingly interesting the adoption of grid technologies to address the production of montecarlo events for high energy physics experiments. The SAM-Grid is a software system developed at Fermilab, which
integrates standard grid technologies for job and information management with SAM, the data handling system of the DZero and CDF experiments. During the past few months, this grid system has been tailored for the montecarlo production of DZero. Since the initial phase of deployment, this experience has exposed an interesting
series of requirements to the SAM-Grid services, the standard middleware, the resources and their management and to the analysis framework of the experiment. As of today, the inefficiency due to the grid infrastructure has been reduced to as little as 1%. In this paper, we present our statistics and the "lesson learned" in running large high energy physics applications on a grid infrastructure.
Files in Document:
SAM_Grid DZero
Notes and Changes:
Fermilab Publication number CONF-04-480-CD
Associated with Events:
CHEP2004 held from 27 Sep 2004 to 01 Oct 2004 in Interlaken, Switzerland
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