les les robertson lcg project leader high energy physics using a worldwide computing grid torino...
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Les Les RobertsonLCG Project LeaderLCG Project Leader
High Energy Physicsusing a worldwidecomputing grid
TorinoDecember 2005
last update 21/04/23 07:29
LCG
• CERN is the world's largest particle physics centre Supported by 20 European countries
• Particle physics is about:- elementary particles, the constituents all matter in the
Universe is made of- fundamental forces which hold matter together
• Particles physics requires:- special tools to create and study new particles
What is CERN?
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LCG
• Physicists smash particles into each other to:- identify their components- create new particles- reveal the nature of the interactions between them- recreate the environment present at the origin of
our Universe (big bang)
• What for? To answer fundamental questions like: How did the Universe begin? What is the origin of mass? What is the nature of antimatter?
What is CERN?
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LCG What is CERN?
The special tools for particle physics are:
• ACCELERATORS, huge machines able to speed up particles to very high energies before colliding them into other particles
• DETECTORS, massive instruments which register the particles produced when the accelerated particles collide
• COMPUTING, to re-construct the collisions, to extract the physics data and perform the analysis
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LCG
Mont Blanc, 4810 m
Downtown Geneva
The CERN Site
ATLAS
CERN sitesALICE
LHCb
CMS
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LCG ATLAS, one of the four LHC experiments
As tall as our main building !
ATLAS has 150 million measurement channels
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LCGBeginning the construction of
ATLAS
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LCG
The accelerator generates 40 million particle collisions (events) every second at the centre of each of the four experiments’ detectors
The LHC Accelerator
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LCG LHC DATA
This is reduced by online computers that filter out a few hundred “good” events per sec.
Which are recorded on disk and magnetic tapeat 100-1,000 MegaBytes/sec ~15 PetaBytes per year for all four experiments
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LCG Resources for LHCData Handling
15 PetaBytes of new data each year
CMS
LHCb
ATLAS
ALICE
1 Petabyte (1PB) = 1000TB 10 times the text content of the World Wide Web
100,000 of today’s fastest processors
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LCGHigh Energy Physics: a global
community
1800 physicists (including 400 students)
150 universities/laboratories34 countries.
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LCG
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LCG Italy and Russia in EGEE/LCG
Italian grid Moscow Region sites
JINR, Dubna Moscow State University Keldysh Institute for
Applied Mathematics Institute of Mathematical
Problems of Biology Institute for Theoretical
and Experimental Physics Institute for Nuclear
Research IHEP, Protvino Skobeltsyn Institute of
Nuclear Research Geophysical Center Keldysh Institute for
Applied Mathematics Kurchatov Institute
Torino
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LCG
regional group
LHC Grid
physicsgroup
les.
rob
ert
son
@ce
rn.c
h
Tier2
Lab a
Uni a
Lab m
Lab b
Uni y
Uni x
Tier3physics
department
Desktop Germany
Taiwan UK
FranceItaly
USA
Netherlands
NordicTier-1
CERN Tier 0
Spain
Canada
Uni b
physicsgroup
Lab c
Uni n
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LCGINFN + LHC EGEE Grid
High Energy Physics a new computing infrastructure for science
1999 – INFN Grid Feeds early experience into discussions of how to
organise distributed computing for LHC 2000 – growing interest in grid technology
HEP community main driver in launching the DataGrid project
2001-2004 - EU DataGrid project middleware & testbed for an operational grid
2002-2005 – LHC Computing Grid – LCG deploying the results of DataGrid to provide aproduction facility for LHC experiments
2004-2006 – EU EGEE project phase 1 starts from the LCG grid shared production infrastructure expanding to other communities and sciences
CERN
Enabling Grids for E-sciencE
INFSO-RI-508833
Enabling Grids for E-SciencE
• EU supported project
• Develop and operate a multi-science grid• Assist scientific communities to embrace
grid technology• First phase concentrated on operations
and technology• Second phase (2006-08)
Emphasis on extending the scientific, geographical and industrial scope
world-wide Grid infrastructure international collaboration In phase 2 will have
> 90 partners in 32 countries (incl. USA, Korea and Taiwan)
Enabling Grids for E-sciencE
INFSO-RI-508833
Applications
>20 applications from 7 domains– High Energy Physics– Biomedicine– Earth Sciences – Computational Chemistry– Astronomy– Geo-Physics– Financial Simulation
Another 8 applications from
4 domains are in evaluation stage
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LCG Summary
High Energy Physics at the Large Hadron Collider Enormous computational and storage needs But established global scientific collaborations Ideal application for emerging grid technology
Symbiosis HEP led the early efforts to set up a working grid environment
(with INFN one of the original leaders in this) EU has provided the catalyst to enable the experience and the
enthusiasm to be transferred to other sciences
the grid is the tool – the end is the science Current Status
Operational grid - ~180 sites - 20 application groups Next steps
New communities a global infrastructure for science Improved usability capacity 1 million jobs/day before
the LHC accelerator comes online in two years
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