CERN Accelerating science

ATLAS Slides
Report number	ATL-SOFT-SLIDE-2011-093
Title	ATLAS Distributed Computing
Author(s)	Schovancova, J (Academy of Sciences of the Czech Republic)
Corporate author(s)	The ATLAS collaboration
Submitted to	105th LHCC Meeting, CERN, Geneva, Switzerland, 23 - 24 Mar 2011
Submitted by	jaroslava.schovancova@cern.ch on 16 Mar 2011
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	ATLAS ; Computing ; Distributed Computing
Abstract	The poster details the different aspects of the ATLAS Distributed Computing experience after the first year of LHC data taking. We describe the performance of the ATLAS distributed computing system and the lessons learned during the 2010 run, pointing out parts of the system which were in a good shape, and also spotting areas which required improvements. Improvements ranged from hardware upgrade on the ATLAS Tier-0 computing pools to improve data distribution rates, tuning of FTS channels between CERN and Tier-1s, and studying data access patterns for Grid analysis to improve the global processing rate. We show recent software development driven by operational needs with emphasis on data management and job execution in the ATLAS production system.