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Ceph-based storage services for Run2 and beyond
/ van der Ster, Daniel C (CERN) ; Lamanna, Massimo (CERN) ; Mascetti, Luca (CERN) ; Peters, Andreas J (CERN) ; Rousseau, Herv (CERN)
In 2013, CERN IT evaluated then deployed a petabyte-scale Ceph cluster to support OpenStack use-cases in production. With now more than a year of smooth operations, we will present our experience and tuning best-practices. [...]
2015 - 4 p.
- Published in : J. Phys.: Conf. Ser. 664 (2015) 042054
IOP Open Access article: PDF;
In : 21st International Conference on Computing in High Energy and Nuclear Physics, Okinawa, Japan, 13 - 17 Apr 2015, pp.042054
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The "Common Solutions" Strategy of the Experiment Support group at CERN for the LHC Experiments
/ Girone, M (CERN) ; Andreeva, J (CERN) ; Barreiro Megino, F H (CERN) ; Campana, S (CERN) ; Cinquilli, M (CERN) ; Di Girolamo, A (CERN) ; Dimou, M (CERN) ; Giordano, D (CERN) ; Karavakis, E (CERN) ; Kenyon, M J (CERN) et al.
After two years of LHC data taking, processing and analysis and with numerous changes in computing technology, a number of aspects of the experiments' computing, as well as WLCG deployment and operations, need to evolve. As part of the activities of the Experiment Support group in CERN's IT department, and reinforced by effort from the EGI-InSPIRE project, we present work aimed at common solutions across all LHC experiments. [...]
2012
- Published in : J. Phys.: Conf. Ser. 396 (2012) 032048
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.032048
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Key developments of the Ganga task-management framework
/ Dzhunov, IA (Sofiya U.) ; Kenyon, M J (CERN) ; Moscicki, J (CERN) ; Richards, A J (Imperial Coll., London) ; Slater, M W (Birmingham U.) ; Brochu, F (Trinity Coll., Cambridge) ; Ebke, J (Munich U.) ; Egede, U (Imperial Coll., London) ; Lee, H (NIKHEF, Amsterdam) ; Van Der Ster, D C (CERN) et al.
Ganga is the main end-user distributed analysis tool for the ATLAS and LHCb experiments and provides the foundation layer for the HammerCloud system, used by the LHC experiments for validation and stress testing of their numerous distributed computing facilities. Here we illustrate recent developments and demonstrate how tools that were initially developed for a specific user community have been migrated into the Ganga core, and so can be exploited by a wider user-base. [...]
2012 - 9 p.
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.032061
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ATLAS Distributed Computing Automation
/ Schovancova, J (Prague, Inst. Phys.) ; Barreiro Megino, F H (CERN) ; Borrego, C (Madrid Autonoma U.) ; Campana, S (CERN) ; Di Girolamo, A (CERN) ; Elmsheuser, J (LMU Munich) ; Hejbal, J (Prague, Inst. Phys.) ; Kouba, T (Prague, Inst. Phys.) ; Legger, F (LMU Munich) ; Magradze, E (Gottingen U.) et al.
The ATLAS Experiment benefits from computing resources distributed worldwide at more than 100 WLCG sites. [...]
ATL-SOFT-PROC-2012-067.
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2012. - 6 p.
Original Communication (restricted to ATLAS) - Full text
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ATLAS Distributed Computing Automation
/ Schovancova, J (Academy of Sciences of the Czech Republic) ; Barreiro Megino, F H (CERN) ; Borrego, C (Physics Department, Universidad Autonoma de Madrid) ; Campana, S (CERN) ; Di Girolamo, A (CERN) ; Elmsheuser, J (Fakultaet fuer Physik, Ludwig-Maximilians-Universitaet Muenchen) ; Hejbal, J (Academy of Sciences of the Czech Republic) ; Kouba, T (Academy of Sciences of the Czech Republic) ; Legger, F (Fakultaet fuer Physik, Ludwig-Maximilians-Universitaet Muenchen) ; Magradze, E (Georg-August-Universitat Goettingen, II. Physikalisches Institut) et al.
The ATLAS Experiment benefits from computing resources distributed worldwide at more than 100 WLCG sites. The ATLAS Grid sites provide over 100k CPU job slots, over 100 PB of storage space on disk or tape. [...]
ATL-SOFT-SLIDE-2012-429.-
Geneva : CERN, 2012 - 12 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
In : 5th International Conference "Distributed Computing and Grid-technologies in Science and Education", Dubna, Russian Federation, 16 - 20 Jul 2012
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ATLAS Distributed Computing Shift Operation in the first 2 full years of LHC data taking
/ Schovancová, J (Prague, Inst. Phys.) ; Di Girolamo, A (CERN) ; Elmsheuser, J (Munich U.) ; Jézéquel, S (Annecy, LAPP) ; Negri, G (CERN) ; Ozturk, N (Texas U., Arlington) ; Sakamoto, H (Tokyo U., ICEPP) ; Slater, M (Birmingham U.) ; Smirnov, Y (Brookhaven) ; Ueda, I (Tokyo U., ICEPP) et al.
ATLAS Distributed Computing organized 3 teams to support data processing at Tier-0 facility at CERN, data reprocessing, data management operations, Monte Carlo simulation production, and physics analysis at the ATLAS computing centers located world-wide. [...]
ATL-SOFT-PROC-2012-015.
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2012. - 4 p.
Original Communication (restricted to ATLAS) - Full text
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ATLAS Distributed Computing Shift Operation in the first 2 full years of LHC data taking
/ Schovancová, J (Academy of Sciences of the Czech Republic) ; Di Girolamo, A (CERN) ; Elmsheuser, J (Fakultaet fuer Physik, Ludwig-Maximilians-Universitaet Muenchen) ; Jézéquel, S (LAPP, Universite de Savoie, CNRS/IN2P3, Annecy-le-Vieux) ; Negri, G (CERN) ; Ozturk, N (The University of Texas at Arlington) ; Sakamoto, H (International Center for Elementary Particle Physics and Department of Physics, The University of Tokyo) ; Slater, M (University of Birmingham) ; Smirnov, Y (Brookhaven National Laboratory (BNL)) ; Ueda, I (International Center for Elementary Particle Physics and Department of Physics, The University of Tokyo) et al.
ATLAS Distributed Computing organized 3 teams to support data processing at Tier-0 facility at CERN, data reprocessing, data management operations, Monte Carlo simulation production, and physics analysis at the ATLAS computing centers located world-wide. In this paper we describe how these teams ensure that the ATLAS experiment data is delivered to the ATLAS physicists in a timely manner in the glamorous era of the LHC data taking. [...]
ATL-SOFT-SLIDE-2012-158.-
Geneva : CERN, 2012 - 1 p.
Fulltext: PDF; External link: Original Communication (restricted to ATLAS)
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