Activities and performance optimization of the Italian computing centers supporting the ATLAS experiment

E Vilucchi,A Andreazza,Daniela Anzellotti,D Barberis,A Brunengo,S Campana,G Carlino,C Ciocca, M Corosu,M Curatolo,L Dellagnello,Alessandro De Salvo,Alessandro Di Girolamo,A Doria,M L Ferrer, A Forti,A Italiano, L Luminari,L Magnoni,B Martelli,Agnese Martini,L Merola,Elisa Musto,L Perini,M Pistolese,David Rebatto, S Resconi,Lorenzo Rinaldi,Davide Salomoni, L Vaccarossa,Riccardo Zappi

Nuclear Science Symposium Conference Record（2009）

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摘要

With this work we present the activity and performance optimization of the Italian computing centers supporting the ATLAS experiment forming the so-called Italian Cloud. We describe the activities of the ATLAS Italian Tier-2s Federation inside the ATLAS computing model and present some Italian original contributions. We describe StoRM, a new Storage Resource Manager developed by INFN, as a replacement of Castor at CNAF - the Italian Tier-1- and under test at the Tier-2 centers. We also show the failover solution for the ATLAS LFC, based on Oracle DataGuard, load-balancing DNS and LFC daemon reconfiguration, realized between CNAF and the Tier-2 in Roma. Finally we describe the sharing of resources between Analysis and Production, recently implemented in the ATLAS Italian Cloud with the Job Priority mechanism.

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关键词

computer centres,nuclear engineering computing,performance evaluation,resource allocation,atlas italian tier-2s federation,atlas lfc,atlas experiment,infn,italian cloud,italian computing centers,lfc daemon reconfiguration,oracle dataguard,storm,failover solution,job priority mechanism,load-balancing dns,performance optimization,storage resource manager,servers,resource manager,production,load balance,storms,availability,databases

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