Bonn 2010 – scientific programme

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T: Fachverband Teilchenphysik

T 75: Grid-Computing II

T 75.5: Talk

Thursday, March 18, 2010, 17:45–18:00, HG ÜR 9

Functional Testing of the ATLAS Distributed Analysis Resources with Ganga — Philippe Calfayan, Guenther Duckeck, Johannes Ebke, Johannes Elmsheuser, •Federica Legger, Christoph Mitterer, Dorothee Schaile, Cedric Serfon, and Rod Walker — Ludwig-Maximilians-Universitaet Muenchen, Fakultaet fuer Physik, Am Coulombwall 1, D-85748 Garching

The ATLAS computing model is based on the GRID paradigm, which entails a high degree of decentralisation and sharing of computer resources. For such a large system to be efficient, regular checks on the performances of the involved computing facilities are desirable. We present the recent developments of a tool, the ATLAS Gangarobot, designed to perform regular tests of all sites by running arbitrary user applications with varied configurations at predefined time intervals. The Gangarobot uses Ganga, a front-end for job definition and management, for configuring and running the test applications on the various GRID sites. The test results can be used to dynamically blacklist sites that are temporarly unsuited to run analysis jobs, therefore providing on the one hand a way to quickly spot site problems, and on the other hand allowing for an effective distribution of the work load on the available resources.