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LHCb computing in Russia Ivan Korolko

LHCb computing in Russia Ivan Korolko. Russia-CERN JWGC, September 2006. Current status (from GOC). Russian distributed Tier-2 cluster permanently participates in LHCb activities (~25% of CPU in Russia). Current status (from GOC). LHCb massive MC production (Data Challenges)

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LHCb computing in Russia Ivan Korolko

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  1. LHCb computing in RussiaIvan Korolko Russia-CERN JWGC, September 2006

  2. Current status (from GOC) Russian distributed Tier-2 cluster permanently participates in LHCb activities (~25% of CPU in Russia)

  3. Current status (from GOC) LHCb massive MC production (Data Challenges) became a routine task, going on with a minimal intervention from site managers (high quality of production software, experience) (DIRAC sites are not shown)

  4. LHCb DC06 Aim: • to produce simulated data for the "physics book" • to make a realistic test of the computing model in order to mimic what we will have to do with real data DC06 is composed by 4 steps: • Simulation • Reconstruction • Stripping (selection) • Data Transfer (involved in each of the above steps)

  5. LHCb DC06 accounting (May...)

  6. History of LHCb DCs in Russia 2002130K events, 1% contribution 20031.3M events, 3% contribution 20049.0M events, 5% contribution ☻ 20055.0M events, 3% contribution 20063.5M events, 2% contribution  Since 2004 we have not increased our resources Expecting considerable improvements in a few months...

  7. Usage of LCG in Russia (LHCb) Massive MC production (DCs) routine task now - 90% of CPU Dedicated LHCb calorimeter studies routine task now - 10% of CPU Distributed analysis – our main goal should also become a routine task... Limiting factors: CPU resources, network, disk space (starting from 2007)

  8. LHCb computing in Russia (plans) Physics interests of Russian scientists: • Studies of CP violation with B and D hadrons • Rare (forbidden) decays of B and D hadrons • Radiative penguin decays of B mesons (non SM physics) • Spectroscopy of B hadrons • High Pt jets (W and Z bosons, t quarks, Higgs) Russian institutes in LHCb: IHEP, INP, INR, ITEP, PNPI

  9. LHCb computing in Russia (plans) • Partially store reconstructed data (rDST) • Store stripped data (DST) • Run stripping jobs on stored rDST • Run analysis jobs (10% of LHCb needs; typical Tier-1 12.5%) • MC production (20% of LHCb needs in 2008 - largest contribution, critical; no MC production at T1) • Calibration, reconstruction algorithms

  10. LHCb Tier2 cluster in Russia partial Tier1 functionality (DST stripping, analysis)

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