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Polish Contribution to the Worldwide LHC Computing Grid WLCG

Polish Contribution to the Worldwide LHC Computing Grid WLCG. Outline Introduction History and status of Polish Tier-2 Federation Example s of physics results from LHC experiments. CERN - European Organisation for Nuclear Reseach. M. Witek

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Polish Contribution to the Worldwide LHC Computing Grid WLCG

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  1. Polish Contribution to the Worldwide LHC ComputingGridWLCG • Outline • Introduction • History and status of Polish Tier-2 Federation • Examples of physics results from LHC experiments CERN - European Organisation for Nuclear Reseach M. Witek On behalf of the team of Polish distributed Tier-2 LHC – Large Hadron Collider LHCb CMS Atlas Alice

  2. Polish WLCG Tier-2 team • Polish WLCG Tier-2 team • A.Binczewski3, M. Bluj5, A.Cyz2, M.Dwużnik1,M. Filocha4, L. Flis1, R.Gokieli4,5, J.Iwaszkiewicz4,M. Kowalski2, P. Lasoń1, R. Lichwała3, M. Łopuszyński4, M. Magryś1, P. Malecki2, N. Meyer3, K. Nawrocki4,5, A. Olszewski2, A. Oziębło1, A. Padee4,5, H. Pałka2,M. Pospieszny3, M.Radecki1, R. Rowicki4, D. Stojda6,4, M. Stolarek4, T. Szepieniec1, T. Szymocha1,2, M.Turała1,2, K.Wawrzyniak4,5, W.Wiślicki4,5, M.Witek2, P.Wolniewicz3 • Institutions • 1 AGH University of Science and technology, ACC Cyfronet AGH,Krakow • 2 Institute of Nuclear Physics PAN, IFJ PAN, Krakow • 3 Poznan Supercomputing and Networking Center, PSNC, Poznan • 4 Interdisciplinary Centre for Mathematical and Computational Modelling, ICM,Warsaw • 5Soltan Institute for Nuclear Studies, IPJ, Warsaw • 6Copernicus Science Centre, CSC, Warsaw, Poland More details will be available in the article of PL-Grid Book

  3. Eksperiment requirements 40 MHz (1000 TB/sec) Level 1 75 KHz (75 GB/sec) Level 2 5 KHz(5 GB/sec) Level 3 100 Hz (100 MB/sec) Data Recording & Offline Analysis • Example of on-lineconditions • ~108 electronic channels to read at 40 MHz • 1 PB/sec of raw info from the detector • ~few TB/sec of zero suppressed data ( channels with signal only) • Multi-level trigger system • Reduction factor 106-107 • Output rate > 100 MB/sec • 107 sec/year ~fewPB of raw data per experiment WLCG

  4. (Pre)History • MONARC (Models of NetworkedAnalysis at Regional Centres for LHC Experiments) • Simulate data processing (a kind of Monte Carlo model): • a complex set of networked computing systems (CERN, Tier-1 and Tier-2 regional centres) • the analysis process, composed of a dynamic workload of reconstruction and analysis • the behaviour of key elements of the system, such as distributed database servers and the networks One of the problems @ 2000: data sharing difficult due to the prohibitively high cost of networking Even more pronounced in Poland at that time !!! Summary: CERN-LCB-2000-001

  5. From 2000 to 2011 • 2000:DataGrid 2000 – HEP oriented EU project • 2000:CERN-Polandmeeting (initiated by M. Turala & P. Malecki) • 2002: CrossGrid first Polish EU project with HEP task. • 2002: start of LCG (LHC Computing Grid) • 2003: First LCG testbed of 14 sites (Cyfronetparticipation) • 2004-2010: EGEE, EGEE II, EGEE III • 2003-2008: Participation in Data Challenges • 2005-2010: BalticGrid, BalticGrid II • 2007: Poland signs MoU for WLCG • 2009: start of PL-Grid project (WLCG infrastructure) • 2009-2011: LHC start. Smooth running of Polish WLCG sites.

  6. Polish participation in networking and grid projects Polish part of WLCG emerged out of many different projects. Some of them not directly related to HEP. Nevertheless they provided infrastructure and common tools. PIONIER, CrossGrid, EGEE and PL-Grid were essential for the development of Polish WLCG infrastructure.

  7. Polishinfrastructurein WLCG GDAŃSK KOSZALIN OLSZTYN BASNET 34 Mb/s SZCZECIN TORUŃ BYDGOSZCZ BIAŁYSTOK DFN 10 Gb/s Gorzów GÉANT 10+10 Gb/s POZNAŃ WARSZAWA GÉANT/TELIA 2x2,5 Gb/s ZIELONA GÓRA ŁÓDŹ GTS 1,6 Gb/s RADOM WROCŁAW CZĘSTOCHOWA PIONIER’S FIBERS KIELCE PUŁAWY OPOLE LUBLIN 2 x 10 Gb/s KATOWICE 10 Gb/s (1 lambda) RZESZÓW KRAKÓW CBDF 10Gb/s Bielsko-Biała 1 Gb/s CESNET, SANET MAN Tier1 FZK Karlsruhe Tier2 PCSS Poznań Tier2 ICM Warszawa HEP VLAN 1 Gb/s HEP VLAN 1 Gb/s Tier2 ACK Cyfronet Kraków

  8. Pionier – PolishOptical Internet • Nationwide broadband optical network represents a base for research and development • Europe's first national academic network that uses its own dark fiber optics and DWDM 10GE transmission • Connects 21 Academic Network Centers of Metropolitan Area Networks (MAN) and 5 of the HPC (High Performance Computing) centers. • Cross-border links with: Germany (DFN), Czech Republic (CESNET), Slovakia (SANET), Ukraine (UARNET), Byelorus, Lithuania Startedin 2000, 5917,5 km of fibres cables @ 2010 Data sharing problem due to networkinglimitsindicated by MONARC solved !

  9. Towards physics results - that is what WLCG was built for 3.5*1014collisionsdeliveredin 2011 Successful LHC restart in 2009 Excellent performance of the LHC and the experiments Every experiment (ALICE, ATLAS, CMS, LHCb) has its own computing model. All based on multi-tier structure The RAW data reside in Tier-0 and Tier-1. The final physics result is an effect of many processing steps. Some steps have to be repeated when better detector calibration and alignment appear. Polishdistributed Tier-2 Kraków-Poznań-Warszawa The role of Tier-2 sites: Monte Carlo production Analysis centre (larger sites) Limited reprocessing activity

  10. LHCbcomputing model – DIRAC role

  11. Polish WLCG resources Atlas LHCb Alice Atlas CMS LHCb ACK Cyfronet AGH – Tier2 Poznan PSNC – Tier2 Warsaw ICM – Tier2 WLCG pledges Tier-3 at IFJ PAN Reliability Availa bility July 2011 Polish sites provide about 2% of the total computing power in proportionto the engagement of Polish scientists in the LHC experiments. Most of the resources comesfromPL-Gridinfrastructure

  12. Poland in LCG accounting LHCb 3.9% delivered by Poland Atlas 1.6 % Delivered by Poland Tier-1/2 CMS 2% delivered by Poland Performance of Polish Tier-2 (From WLCG Accounting) Highlight from LHCb Increase over 100% mainly due to Cyfronetadditional resources Atpresent 69 Tier-2 federationsin 33 countries. Thesize of Polish Tier-2 isin top 20. A week with 9 % contribution of Cyfronet to the LHCb reprocessing of 2011 data. Congratulations for the site performance from the LHCb computing team.

  13. The Standard Model – Particles and Forces Buldingblocks of ourUniverse

  14. ATLAS and CMS – direct discovery potential • Find the last undiscovered element of the Standard Model • The Higgs bozon • Direct discovery of New Physics • Supersymmetric particles or any object/phenomena beyond Standard Model we even did not think about yet ATLAS TheHiggsbosonsearch CMS

  15. LHCb – LHC beauty experiment Standard Model Supersymmery Bs0 (bs) meson contains two quarks which are not present in the world around us: b beauty and s strange • Hunting the signs of new physics by precision measurements New Physics Bs0→μ+μ- Extremely rare decay 3 out of 109 decays New phenomena can significantly increase the decay rate 2 decaysobserved – 1.4 expected 2 events selected out of recorded 1010WLCG 2 events selected out of 3.5*1014 initial collisions No sign of New Physicsyet

  16. Summary • Polish physicists and computer scientists created distributed WLCG Tier2, which availability and efficiency is high; the delivered resources are in the range 2-3 % of the total. • The performance of the WLCG matches high requirements of the data processing of LHC experiments. • Lots of highest quality physics results are being shown recently. Much more are on the way, hopefully showing New Physics. Acknowledgments We would like to thank all people for their contribution to the successful creation and operation of Polish Tier-2 Federation. In particular the management and staff of the three computing centres, ACC Cyfronet AGH in Krakow, ICM UW inWarsaw and PSNC in Poznan for their constructive cooperation. A supportive approach of the directorates of IFJ PAN Krakow and IPJ Warsaw is also appreciated. We are also grateful to many people from CERN, the FZK Karlsruhe and other WLCG collaborating institutions for their friendly advice and support.

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