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T: Teilchenphysik

T 509: Grid II

T 509.6: Talk

Thursday, March 30, 2006, 17:40–17:55, HG2-HS7

Experiences in running a CMS Tier-2 at Desy Hamburg — •Christoph Rosemann¹, Joachim Mnich¹, Michael Ernst¹, Volker Gülzow¹, Alexander Floßdorf¹, Benedikt Hegner¹, Markus Duda², and Klaus Rabbertz³ — ¹Desy Hamburg — ²RWTH Aachen — ³IEKP Karlsruhe

The Large Hadron Collider Computing Grid (LCG) foresees a hierachical structure of computing centers, called Tiers. Each type of center consists of a set of services on top of a computing infrastructure. CERN IT will provide the unique Tier-0 with equally unique services. For CMS in germany exists the GridKa in Karlsruhe as Tier-1 and a No-dqfederatedNo-dq Tier-2 which is distributed between Desy Hamburg and RWTH Aachen.

Desy provides both user analysis and Monte Carlo production while Aachen focuses on the Monte Carlo production. Besides the tier structure the different CMS-specific components which are needed to run the Tier-2 functionality at Desy are described. Main topics of the talk are the experiences in running one of the few No-dqearlyNo-dq Tier-2s in CMS.