EGI-In. SPIRE Pierre Auger Observatory Jiří Chudoba Institute of Physics and CESNET, Prague The VO auger manager EGI-In. SPIRE RI-261323 www. egi. eu
Overview • • PAO Motivations for the grid computing Production experience VRC 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 2 www. egi. eu
Ultra High Energy Cosmic Rays 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 3 www. egi. eu
Pierre Auger Observatory 1 600 detectors 3 000 km 2 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 4 www. egi. eu
Pierre Auger Observatory 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 5 www. egi. eu
Results 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 6 www. egi. eu
Pierre Auger Observatory Collaboration • About 500 members from more than 111 institutes from 18 countries Participating countries: Argentina, Australia, Bolivia, Brazil, Czech Republic, France, Germany, Italy, Mexico, Netherlands, Poland, Portugal, Slovenia, Spain, United Kingdom, USA and Vietnam 29. 3. 2012 Jiri. Chudoba@cern. ch EGI-In. SPIRE RI-261323 7 www. egi. eu
Motivations for the GRID • Monte Carlo simulations of showers • CORSIKA program with several models • Tens of CPU hours for highest energies • Different energy bins, angles, models, chemical composition • Simulated data distribution • Uniform access to resources • Increase available resources NB: No real data on the grid – local sites (CCIN 2 P 3 and Fermilab) are sufficient 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 8 www. egi. eu
Usage – Top 10 in 2011 VO auger was the biggest EGI grid user after the 4 LHC VOs 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 9 www. egi. eu
Usage – AA cluster in 2011 Credits: Production team from Granada university CESNET – running central services (VOMS, LFC) Sites and site admins – provide resources 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 10 www. egi. eu
Similar results in 2012 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 11 www. egi. eu
Storage Gstat value: 2 PB Real value: 300 TB 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 12 www. egi. eu
Experience • Many job slots available • Storage shortage • Overfilling of some sites • High level tools were missing • Now we have second generation of custom tools for semiautomatic production • Reliability increases • Requires continuous effort • Site admins ask for a membership 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 13 www. egi. eu
Experience • Grid access too complicated for some users • Certificate; UI ready for all VO users; • Certificate change – file ownership problem • Copies of output files also available via SRB, accessible with the local account in CC IN 2 P 3 • Some users very active • Lots of jobs, lots of small files • 3 day sw tutorial planned for June in Prague • grid tutorial included 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 14 www. egi. eu
Expectations from the VRC • Forum for placing requirements • Better documentation (from both sides) • Custom procedures • SLA with sites, different policies • Additional manpower for solving concrete problems • Easier negotiations with sites 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 15 www. egi. eu
Signing the VRC • PAO management in favour • Suggested Mo. U relatively “heavy” • many topics, many contact persons • several persons found within the collaboration • Cooperation with other AA projects welcome (Corsika simulations planned by more projects) 29. 3. 2012 EGI-In. SPIRE RI-261323 Jiri. Chudoba@cern. ch 16 www. egi. eu
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