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Published on October 17, 2007

Author: Arley33

Source: authorstream.com

LHC Computing Grid Project - LCG:  LHC Computing Grid Project - LCG The LHC Computing Grid First steps towards a Global Computing Facility for Physics 18 September 2003 Les Robertson – LCG Project Leader CERN – European Organization for Nuclear Research Geneva, Switzerland les.robertson@cern.ch LHC DATA:  LHC DATA 15 PetaBytes/year This is reduced by online computers that filter out around 100 “good” events per sec. The accelerator generates 40 million particle collisions (events) every second at the centre of each of the four experiments’ detectors Which are recorded on disk and magnetic tape at 100-1,000 MegaBytes/sec 15 million DVD movies The LHC accelerator – the largest superconducting installation in the world 27 kilometres of magnets cooled to – 300o C colliding proton beams at an energy of 14 TeV Accumulating a vast data base The LHC Accelerator Slide3:  LHC data handling 1-10 Megabytes of data digitised for each collision = recording rate of 0.1-1 Gigabytes/sec 1010 collisions recorded each year = ~15 Petabytes/year of data ~100K of today’s PCs will be needed for analysis CMS LHCb ATLAS ALICE 1 Megabyte (1MB) A digital photo 1 Gigabyte (1GB) = 1000MB A DVD movie 1 Terabyte (1TB) = 1000GB World annual book production 1 Petabyte (1PB) = 1000TB Annual production of one LHC experiment 1 Exabyte (1EB) = 1000 PB World annual information production Slide4:  Computing for LHC Solution: Computing centres, which were isolated in the past, will be connected into a computing grid Europe: 267 institutes 4603 users Elsewhere: 208 institutes 1632 users -- uniting the computing resources of particle physicists in the world!   CERN has over 6,000 users from more than 450 institutes from around the world LHC Computing Grid – a Collaboration:  LHC Computing Grid – a Collaboration Building and operating the LHC Grid involves a collaboration of The physicists and computing specialists from the LHC experiment The projects in the US and Europe that have been developing Grid middleware The regional and national computing centres that provide resources for LHC and usually also for other physics experiments and other sciences Researchers Software Engineers Service Providers LCG Service Status:  Middleware package – components from – European DataGrid (EDG) US (Globus, Condor, PPDG, GriPhyN)  the Virtual Data Toolkit Agreement reached on principles for registration and security Rutherford Lab (UK) to provide the initial Grid Operations Centre FZK (Karlsruhe) to operate the Call Centre The “certified” release was made available to 13 centres on 1 September – Academia Sinica Taipei, Brookhaven, CERN, CNAF Bologna, Cyfronet Cracow, Fermilab, FZK Karlsruhe, IN2P3 Lyon, KFKI Budapest, Moscow State Univ., Prague, PIC Barcelona, RAL, Univ. Tokyo Next steps – - Get the experiments going - Expand to other centres LCG Service Status LCG Regional Centres:  LCG Regional Centres First wave centres CERN Academica Sinica Taiwan Brookhaven National Lab PIC Barcelona CNAF Bologna Cyfronet Cracow Fermilab FZK Karlsruhe IN2P3 Lyon KFKI Budapest Moscow State University University of Prague Rutherford Appleton Lab (UK) University of Tokyo Other Centres Caltech GSI Darmstadt Italian Tier 2s(Torino, Milano, Legnaro) JINR Dubna Manno (Switzerland) NIKHEF Amsterdam Ohio Supercomputing Centre Sweden (NorduGrid) Tata Institute (India) Triumf (Canada) UCSD UK Tier 2s University of Florida– Gainesville …… Pilot production service : 2003 – 2005 Resources in Regional Centres:  Resources in Regional Centres Resources planned for the period of the data challenges in 2004 CERN ~12% of the total capacity Efficiency of use is a major question mark Reliability Efficient scheduling Sharing between Virtual Organisations (user groups) Slide9:  LCG Staff at CERN – by source of funding Key LCG goals for next 12 months:  Key LCG goals for next 12 months Take-up by the experiments - starting this month First half 2004 – Major “Data Challenges” of the four experiments developing/validating the data analysis models using the geographically distributed Grid Preparing a second generation of Grid middleware Hardened, re-engineered Collaboration of a new EU-funded project – EGEE with experiments, other sciences …. And similar US projects

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