After years of development, the CMS distributed computing system is now in full operation. The LHC continues to set records for operational performance, and CMS records data at more than 300 Hz. Because of the intensity of the beams, there are multiple proton-proton interactions per beam crossing, leading to ever-larger event sizes and processing times. The CMS computing system has responded admirably to these challenges, but some reoptimization of the computing model has been required to maximize the efficient delivery of data analysis results by the collaboration in the face of increasingly constrained computing resources. We present the current status of the system, describe the recent performance, and discuss the challenges ahead and how CMS intends to meet them.
CMS resource utilization and limitations on the grid after the first two years of LHC collisions / Giuseppe Bagliesi; Kenneth Bloom; Daniele Bonacorsi; Chris Brew; Ian Fisk; Jose Flix; Peter Kreuzer; Andrea Sciabà. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - ELETTRONICO. - 396:(2012), pp. 032012-032022. [10.1088/1742-6596/396/3/032012]
CMS resource utilization and limitations on the grid after the first two years of LHC collisions
BONACORSI, DANIELE;
2012
Abstract
After years of development, the CMS distributed computing system is now in full operation. The LHC continues to set records for operational performance, and CMS records data at more than 300 Hz. Because of the intensity of the beams, there are multiple proton-proton interactions per beam crossing, leading to ever-larger event sizes and processing times. The CMS computing system has responded admirably to these challenges, but some reoptimization of the computing model has been required to maximize the efficient delivery of data analysis results by the collaboration in the face of increasingly constrained computing resources. We present the current status of the system, describe the recent performance, and discuss the challenges ahead and how CMS intends to meet them.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.