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SUMMARY:Computing Challenges at the Pierre Auger Observatory
DTSTART;VALUE=DATE-TIME:20120504T090000Z
DTEND;VALUE=DATE-TIME:20120504T094500Z
DTSTAMP;VALUE=DATE-TIME:20130522T133150Z
UID:indico-contribution-28@cern.ch
DESCRIPTION:Speakers: CHUDOBA\, Jiri (Acad. of Sciences of the Czech Rep. 
 (CZ))\nPierre Auger Observatory needs a lot of computing resources for sim
 ulation of cosmic ray showers with ultra-high energies up to 10^21 eV. We 
 are able to use simultaneously several thousand cores and generate more th
 an 1 TB of data daily in the current EGI grid environment. We are limited 
 by available resources and a long duration of a single job for very high e
 nergies\, which is already simplified by thinning parameter in the Corsika
  simulation program.  Details of the time traces which would be useful for
  mass composition analyses and hadronic interaction physics get lost by th
 inning. Thousand times more computing power and correspondingly increased 
 storage is needed for simulations without thinning. Significant speedup co
 uld be obtained by using many CPUs or even GPUs for generation of a single
  shower. We discuss the current trends in the middleware heading to a prov
 ision of a whole worker node with many cores to a single parallel job. The
  expected development in the Corsika and Geant4 towards parallelization an
 d usage of GPU is needed for an efficient usage of the new infrastructure.
  Possibilities of computing in clouds are also discussed.\n\nhttp://indico
 .cern.ch/contributionDisplay.py?contribId=28&confId=159120
LOCATION:Institute of Physics Academy of Sciences of the Czech Republic\, 
 Czech Republic
URL:http://indico.cern.ch/contributionDisplay.py?contribId=28&confId=15912
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