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Computing for LHCb - Ital y

Computing for LHCb - Ital y. Domenico Galli and Umberto Marconi Dipartimento di Fisica and INFN Bologna. Genève , july 5, 2000. Milestones. On June 15, the LHCb-Italy computing plan was presented to INFN “Commissione I”.

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Computing for LHCb - Ital y

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  1. Computing for LHCb-Italy Domenico Galli and Umberto Marconi Dipartimento di Fisica and INFN Bologna Genève, july 5, 2000

  2. Milestones • On June 15, the LHCb-Italy computing plan was presented to INFN “Commissione I”. • On July 4, the LHCb-Italy detailed request was submitted to INFN referees. • On September 7, we will meet INFN referees. • On September 15, the response of “Commissione I” for 2001 investments is expected. Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  3. Plans for Monte Carlo Production from 2001 to 2005 • In 2001 we will produce ~2´ 108simulated eventsfor detector and trigger optimisation (detector TDRs expected in 2001 and early 2002); • In 2002-2005 we will start to produce very large samples of simulated events, in particular background, for physics studies (2.4´106 evt in 2002, 7´106in 2003, 1.5´107 in 2004,…); Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  4. Statistics needed for trigger optimisation Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  5. CPU time needed for L0 trigger optimisation Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  6. CPU time needed for L1 trigger optimisation Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  7. CPU time needed for L2 trigger optimisation Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  8. Total Requirements for LHCb Tier-1 Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  9. Total Requirements for LHCb Tier-1 (II) SI95 TB Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  10. Incremental acquisition ofEquipment for LHCb Tier-1 • Resourcessplitted up among 5 regional centres. • In steady state (starting from 2006) replacementevery yearof 30% of CPU and of 20% of disc. Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  11. The INFN Tier-1 for LHCb • LHCb-Italy plans to concentrate the Tier-1 Regional Centre in only one site (differently from other Italian LHC groups), housed in a “consorzio di calcolo”, chosen based on economic convenience. • Only one installation. • Same architecture of other European Tier-1 centres. • No problems concerning WAN usage (routing, data transfer optimisation to obviate bandwidth, etc.). • No organisation and synchronisation requirements. • Remote control of concentrated computing resources requires less bandwidth than geographically distributed data and CPUs. • Transparent remote control of concentrated resources by institutes will be allowed by GRID middleware. Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  12. The INFN Tier-1 for LHCb (II) • The “consorzio” is concerned with housing of computing resources: • Links to electricity grid and computing network; • Air conditioning; • Uninterruptible power supply; • Guardianship. • To the “consorzio” we plan to outsource system administration: • Participation to system installation; • Administration and monitoring; • Intervention in case of hang; • Intervention for restoring LAN or WAN connectivity; • Backup procedures; • Operating system updating and patching. Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  13. Investment plan for LHCb-Italy Computing for LHCb-Italy Domenico Galli and Umberto Marconi

  14. Computing group of LHCb-Italy Computing for LHCb-Italy Domenico Galli and Umberto Marconi

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