ATLAS data are distributed centrally to Tier-1 and Tier-2 sites. The first stages of data selection and analysis take place mainly at Tier-2 centres, with the final, iterative and interactive, stages taking place mostly at Tier-3 clusters. The Italian ATLAS cloud consists of a Tier-1, four Tier-2s, and Tier-3 sites at each institute. Tier-3s that are grid-enabled are used to test code that will then be run on a larger scale at Tier-2s. All Tier-3s offer interactive data access to their users and the possibility to run PROOF. This paper describes the hardware and software infrastructure choices taken, the operational experience after 10 months of LHC data, and discusses site performances.
Computing infrastructure for ATLAS data analysis in the Italian grid cloud / A. Andreazza, A. Annovi, D. Barberis, A. Brunengo, S. Campana, G. Carlino, C. Ciocca, M. Cobal, M. Corosu, A. De Salvo, U. De Sanctis, A. Di Girolamo, A. Doria, F. Galeazzi, M.K. Jha, L. Luminari, A. Martini, L. Merola, E. Musto, F. Pascolo, L. Perini, M. Pistolese, D. Rebatto, L. Rinaldi, L. Vaccarossa, E. Vilucchi, R. Vitillo. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 331:5(2011), pp. 052001.1-052001.7. ((Intervento presentato al convegno International conference on computing in high energy and nuclear physics tenutosi a Taipei (Taiwan) nel 2010.
Computing infrastructure for ATLAS data analysis in the Italian grid cloud
A. Andreazza;L. Perini;
2011
Abstract
ATLAS data are distributed centrally to Tier-1 and Tier-2 sites. The first stages of data selection and analysis take place mainly at Tier-2 centres, with the final, iterative and interactive, stages taking place mostly at Tier-3 clusters. The Italian ATLAS cloud consists of a Tier-1, four Tier-2s, and Tier-3 sites at each institute. Tier-3s that are grid-enabled are used to test code that will then be run on a larger scale at Tier-2s. All Tier-3s offer interactive data access to their users and the possibility to run PROOF. This paper describes the hardware and software infrastructure choices taken, the operational experience after 10 months of LHC data, and discusses site performances.
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