Abstract
The Worldwide LHC Computing Grid (WLCG) project decided in March 2009 to perform scale tests of parts of its overall Grid infrastructure before the start of the LHC data taking. The “Scale Test for the Experiment Program” (STEP’09) was performed mainly in June 2009 -with more selected tests in September- October 2009 -and emphasized the simultaneous test of the computing systems of all 4 LHC experiments. CMS tested its Tier-0 tape writing and processing capabilities. The Tier-1 tape systems were stress tested using the complete range of Tier-1 work-flows: transfer from Tier-0 and custody of data on tape, processing and subsequent archival, redistribution of datasets amongst all Tier-1 sites as well as burst transfers of datasets to Tier-2 sites. The Tier-2 analysis capacity was tested using bulk analysis job submissions to backfill normal user activity. In this talk, we will report on the different performed tests and present their post-mortem analysis.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
The Worldwide LHC Computing Grid (WLCG) web portal: http://lcg.web.cern.ch/LCG
J. D. Shiers, “The Worldwide LHC Computing Grid (worldwide LCG)”, Computer Physics Communications 177 (2007) 219–223, CERN, Switzerland
M. Aderholz et al., “Models of Networked Analysis at Regional Centres for LHC Experiments (MONARC), Phase 2 Report”, CERN/LCB 2000-001 (2000)
S. Bethke et al., “Report of the Steering Group of the LHC Computing Review”, CERN/LHCC 2001-004 (2001)
CMS Collaboration, “The CMS experiment at the CERN LHC”, JINST 3 S08004 (2008) doi: 10.1088/1748-0221/3/08/S08004
D. Bonacorsi et al., “WLCG Service Challenges and Tiered architecture in the LHC era”, IFAE, Pavia, April 2006
D. Bonacorsi et al., “Towards the operation of the INFN Tier-1 for CMS: lessons learned from CMS DC04”, Proceedings of XI International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT’05), DESY, Zeuthen, 2005
I. Fisk, “CMS Experiences with Computing Software and Analysis Challenges”, presented at Computing in High Energy and Nuclear Physics (CHEP’07), Victoria, BC, Canada, September 2007
O. Gutsche et al., “WLCG scale testing during CMS data challenges”, J. Phys.: Conf. Ser. 119 062033 (2008) doi: 10.1088/1742-6596/119/6/062033
CMS CSA’07 twiki portal: https://twiki.cern.ch/twiki/bin/view/CMS/CSA07
WLCG CCRC’08 twiki portal: https://twiki.cern.ch/twiki/bin/view/LCG/ WLCGCommonComputingReadinessChallenges
J.D. Shiers et al., “The (WLCG) Common Computing Readiness Challenge(s) -CCRC’08”, contribution N29-2, Grid Computing session -Nuclear Science Symposium, IEEE (Dresden), October 2008
CMS CCRC’08 twiki portal: https://twiki.cern.ch/twiki/bin/view/CMS/CMSCCRC08
L. Bauerdick and D. Bonacorsi, “CMS results in the Combined Computing Readiness Challenge (CCRC08)”, 11th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD’08), Siena, Italy, Jun 7-10, 2010
CMS Collaboration, “The CMS Computing Project Technical Design Report”, CERN-LHCC2005-023
CASTOR project website: http://castor.web.cern.ch/castor
S. Chatrchyan et al., “CMS Data Processing Workflows during an Extended Cosmic Ray Run”, J. Instrum. 5 T03006 (2009) arXiv: 0911.4842. CMS-CFT-09-007
Storage Resource Management (SRM) project website: http://sdm.lbl.gov/srm-wg
D. Bonacorsi, T. Barrass, J. Hernandez, J. Rehn, L. Tuura, J. Wu, I. Semeniouk, “PhEDEx high-throughput data transfer management system”, CHEP06, Computing in High Energy and Nuclear Physics, T.I.F.R. Bombay, India, February 2006
T. Barrass et al, “Software agents in data and workflow management”, Proc. CHEP04, Interlaken, 2004. See also http://www.pa.org
R. Egeland et al., “Data transfer infrastructure for CMS data taking”, XIII International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT’08), Erice, Italy, Nov 3-7, 2008 -Proceedings of Science, PoS (ACAT08) 033 (2008)
L. Tuura et al., “Scaling CMS data transfer system for LHC start-up”, presented at Computing in High Energy and Nuclear Physics (CHEP’07), Victoria, BC, Canada, September 2007 J. Phys.: Conf. Ser. 119 072030 (2008) doi: 10.1088/1742-6596/119/7/072030
Debugging Data Transfer program twiki portal: https://twiki.cern.ch/twiki/bin/view/CMS/ DebuggingDataTransfers
N. Magini et al., “The CMS Data Transfer Test Environment in Preparation for LHC Data Taking”, IEEE Nuclear Science Symposium, Dresden, Conference Record N67-2, Applied Computing Techniques session (2008)
L. Tuura et al., “Scaling CMS data transfer system for LHC start-up”, presented at Computing in High Energy and Nuclear Physics (CHEP’07), Victoria, BC, Canada, September 2007 J. Phys.: Conf. Ser. 119 072030 (2008)
A. Fanfani et al., “Distributed Analysis in CMS”, Journal of Grid Computing, Computer Science Collection, 1570-7873 (Print) 1572-9814 (Online), doi: 10.1007/s10723-010-9152-1, March 2010
D. Spiga et al., “The CMS Remote Analysis Builder (CRAB)”, Lect. Notes Comput. Sci. 4873, 580-586 (2007)
D. Andreotti et al.,, “First experiences with CMS Data Storage on the GEMSS system at the INFN-CNAF Tier-1”, International Symposium on Grid Computing 2010 (ISGC’10), Taipei, Taiwan, March 5-12, 2010
P. Kreuzer et al., “The CMS CERN Analysis Facility (CAF)”, presented at Computing in High Energy and Nuclear Physics (CHEP’09), Prague, Czech Republic, March 21-27, 2009 -to be published in J. Phys.: Conf. Ser.
S. Belforte et al., “The commissioning of CMS Computing Centres in the WLCG Grid”, XIII International Workshop on Advanced Computing and Analysis Techniques in Physics Research (ACAT’08), Erice, Italy, Nov 3-7, 2008 -Proceedings of Science, PoS (ACAT08) 043 (2008)
D. Evans et al., “The CMS Monte Carlo production system: Development and Design”, Nucl. Phys. Proc.Suppl. 177-178 285-286 (2008)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2011 Springer Science+Business Media, LLC
About this paper
Cite this paper
Bonacorsi, D., Gutsche, O. (2011). From the CMS Computing Experience in the WLCG STEP’09 Challenge to the First Data Taking of the LHC Era. In: Lin, S., Yen, E. (eds) Data Driven e-Science. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-8014-4_28
Download citation
DOI: https://doi.org/10.1007/978-1-4419-8014-4_28
Published:
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4419-8013-7
Online ISBN: 978-1-4419-8014-4
eBook Packages: Computer ScienceComputer Science (R0)