35523 Conferences false [["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] Institute of Physics AS CR fialal@fzu.cz 8298 chep2009@particle.cz computing particle physics high energy nuclear physics chep prague 2009 International Conference on Computing in High Energy and Nuclear Physics False Prague

Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic

2009-03-21T08:00:00 2009-03-27T13:30:00 2008-06-05T14:32:25 2012-03-01T14:03:28 Europe/Prague CESNET jan.gruntorad@cesnet.cz Institute of Physics milos.lokajicek@cern.ch 178 false [["minutes", "Minutes"], ["notes", "Notes"], ["paper", "Paper"], ["poster", "Poster"], ["slides", "Slides"], ["summary", "Summary"]] Online Computing 0 oral Department of Physics - Univ. of California at San Diego (UCSD) and CERN, Geneva, Switzerland jose.antonio.coarasa.perez@cern.ch Department of Physics - Univ. of California at San Diego (UCSD) and CERN, Geneva, Switzerland jose.antonio.coarasa.perez@cern.ch Massachusetts Institute of Technology, Cambridge, Massachusetts, USA gerry.bauer@cern.ch DESY, Hamburg, Germany ulf.behrens@desy.de FNAL, Chicago, Illinois, USA biery@fnal.gov University of California, San Diego, San Diego, California, USA branson@ucsd.edu CERN, Geneva, Switzerland eric.cano@cern.ch FNAL, Chicago, Illinois, USA cheung@fnal.gov CERN, Geneva, Switzerland marek.ciganek@cern.ch CERN, Geneva, Switzerland sergio.cittolin@cern.ch CERN, Geneva, Switzerland christian.deldicque@cern.ch University of California, San Diego, San Diego, California, USA edusinberre@physics.ucsd.edu CERN, Geneva, Switzerland and University of California, Los Angeles, Los Angeles, California, USA samim.erhan@cern.ch Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Rio de Janeiro , Brazil fabiana.fortes.rodrigues@cern.ch CERN, Geneva, Switzerland dominique.gigi@cern.ch CERN, Geneva, Switzerland frank.glege@cern.ch CERN, Geneva, Switzerland robert.gomez-reino@cern.ch CERN, Geneva, Switzerland johannes.gutleber@cern.ch DESY, Hamburg, Germany dhatton@mail.desy.de CERN, Geneva, Switzerland jean-francois.laurens@cern.ch CERN, Geneva, Switzerland and FNAL, Chicago, Illinois, USA juan.lopez.perez@cern.ch CERN, Geneva, Switzerland frans.meijers@cern.ch CERN, Geneva, Switzerland emilio.meschi@cern.ch DESY, Hamburg, Germany and CERN, Geneva, Switzerland andreas.meyer@cern.ch FNAL, Chicago, Illinois, USA remigius.mommsen@cern.ch CERN, Geneva, Switzerland roland.moser@cern.ch FNAL, Chicago, Illinois, USA odell@fnal.gov CERN, Geneva, Switzerland alexander.oh@cern.ch CERN, Geneva, Switzerland luciano.orsini@cern.ch CERN, Geneva, Switzerland vaios.patras@cern.ch Massachusetts Institute of Technology, Cambridge, Massachusetts, USA paus@mit.edu University of California, San Diego, San Diego, California, USA andrea.petrucci@cern.ch University of California, San Diego, San Diego, California, USA marco.pieri@cern.ch CERN, Geneva, Switzerland attila.racz@cern.ch CERN, Geneva, Switzerland hannes.sakulin@cern.ch University of California, San Diego, San Diego, California, USA matteo.sani@cern.ch CERN, Geneva, Switzerland philipp.schieferdecker@cern.ch CERN, Geneva, Switzerland christoph.schwick@cern.ch FNAL, Chicago, Illinois, USA dshpakov@fnal.gov University of California, San Diego, San Diego, California, USA ssimon@physics.ucsd.edu Massachusetts Institute of Technology, Cambridge, Massachusetts, USA konstanty.sumorok@cern.ch LIP, Lisbon, Portugal and CERN, Geneva, Switzerland joao.varela@cern.ch CERN, Geneva, Switzerland zanetti.marco@cern.ch Prague

Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic

Club D 2009-03-26T16:50:00 2009-03-26T17:10:00 00:20 The CMS online cluster consists of more than 2000 computers, mostly under Scientific Linux CERN, running the 10000 applications instances responsible for the data acquisition and experiment control on a 24/7 basis. The challenging dimension of the cluster constrained the design and implementation of the infrastructure: - The critical nature of the control applications demands a tight security and independence of external networks, including the CERN's network, while maintaining a high availability of the services; - The evolving nature of the acquisition applications requires an easy management and configuration infrastructure suitable for large scale installation and fast configuration turnaround: any failing computer can be replaced and fully configured automatically from scratch in less than 10 minutes; more than 1000 computers can be reinstalled concurrently in less than 60 minutes and the infrastructure is easily scalable to reduce the installation time and accommodate for more computers at the same time; - The large number of subsystems and users imposes dealing with heterogeneous systems and services; - In the next two years the cluster will increase its size more than 50% while the detector reaches its nominal capacity, which demands for easy scalability; In this paper we will revise the tools and solutions used to fulfill the aforementioned requirements and others coming from the scale of the cluster. Details will be given on the problems and solutions adopted, ranging from the implementation of the redundant and load balanced network services (DNS, DHCP, LDAP, Kerberos, file serving, proxys...) to the configuration and deployment infrastructure based on quattor. slides doc http://indico.cern.ch/images/word.png word file ppt http://indico.cern.ch/images/powerpoint.png powerpoint file pdf http://indico.cern.ch/images/pdf_small.png pdf file odt http://indico.cern.ch/images/writer.png writer file odp http://indico.cern.ch/images/impress.png presentation file ods http://indico.cern.ch/images/calc.png spreadsheet file other http://indico.cern.ch/images/file_small.png unknown type file link http://indico.cern.ch/images/link.png link 2013-05-25 2013-05-26