ATLAS Data Challenges: large-scale productions on the Grid
L. Goossens, G. Poulard, Dario Barberis · Proceedings of International Europhysics Conference on High Energy Physics — PoS(HEP2005) · 2007
The ATLAS Collaboration is preparing for data taking and analysis at the CERN LHC scheduled to start operating in 2007.As part of this preparation, a series of computing Data Challenges (DC) was started in 2002, with the goal of validating the Computing Model, the complete software suite, and the data model, and to ensure the correctness of the technical choices to be made for the final offline computing environment.DC1 was conducted during 2002-03; the main goals achieved were to set up the production infrastructure in a real worldwide collaborative effort, and to gain experience in exercising an ATLAS wide production model.DC2, run from May until December 2004, was a similar exercise but deployed a new Production System able to submit jobs on three different Grids: LCG, OSG/GRID3 and Arc/NorduGrid.Right after DC2, a new Monte Carlo production was necessary to produce the needed event samples for an ATLAS Physics workshop (called Rome workshop) taking place in June 2005.In this paper we present our experience with these large-scale productions conducted on the three aforementioned Grids.