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ZEUS & the Grid

ZEUS & the Grid. Rainer Mankel (DESY Hamburg) for the ZEUS grid group DESY Grid User Meeting, 7-May-2004. Grid Users’ Meeting. An excellent idea implies there are use cases implies there is something to be used a major step towards an established service. HERA grid presentation.

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ZEUS & the Grid

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  1. ZEUS & the Grid Rainer Mankel (DESY Hamburg) for the ZEUS grid group DESY Grid User Meeting, 7-May-2004

  2. Grid Users’ Meeting • An excellent idea • implies there are use cases • implies there is something to be used • a major step towards an established service R. Mankel, ZEUS & the Grid

  3. HERA grid presentation • Max Vorobiev & Sanjay Padhi will give a joint seminar about HERA grid activities on Mo 17-May 16:00 SR3 • see this seminar for more details about achievements in H1 & ZEUS R. Mankel, ZEUS & the Grid

  4. Motivation • HERA-II programme leads to a sizable increase in MC simulation demand • increased luminosity • increased event complexity (MVD, STT, ...) • distributed computing shifts worldwide to grid technology • Update of ZEUS computing strategy in fall 2003 identified enabling MC production for the grid as a major goal • Long term: grid analysis? R. Mankel, ZEUS & the Grid

  5. Main mid-term goals • Establish operation of ZEUS simulation suite in grid environment (LCG2) • Establish interoperation with external grid sites • Add steering for production mode • Establish data flow for persistent & transient data • Start production R. Mankel, ZEUS & the Grid

  6. Issues • Need to gain new resources through grid • Need to keep existing resources • almost 300 M events/year (funnel) • User should not have to worry where his jobs runs • need transparent production system R. Mankel, ZEUS & the Grid

  7. The integrated production concept Tokyo Tel Aviv Integrated ZEUS Production System (largely reusing funnel) Funnel sites Bologna Padova Montreal Funnel sites ZEUS Grid Krakow Rome Grid sites ... R. Mankel, ZEUS & the Grid

  8. Internal structure of experiment (ZEUS) grid? • It is important to specify the role of Core versus site-specific components R. Mankel, ZEUS & the Grid

  9. Job Description lang. RLS SSH RC UI RB USER OUTPUT BDII Certs. SE SE SE SE $HOME/.globus/ CE CE CE CE DISK DISK DISK DISK WN WN WN WN WN WN WN WN WN WN WN WN NFS DISK MOUNT NFS DISK MOUNT NFS DISK MOUNT NFS DISK MOUNT Structure of a ZEUS grid Grid site 1 Core services (DESY) Grid site 2 Grid site 3 Grid site 0 (DESY) R. Mankel, ZEUS & the Grid ...

  10. Job Description lang. RLS SSH RC UI RB USER OUTPUT BDII Certs. $HOME/.globus/ What will core services at DESY look like? • Common RB etc for H1 grid, ZEUS grid and others (LHC? D-Grid?) • attractive if technically feasible • need production quality • Such a core facility should be run by DESY-IT • Responsibility for site-specific computing at DESY (CE/WN/SE)? • multi-VO common farm ? Integrated Multi-VO Core services (H1, ZEUS, ...?) R. Mankel, ZEUS & the Grid

  11. What we will need from DESY-IT • Infrastructure for maintaining virtual organizations (e.g. ZEUS) • very important: reliable dissemination of VOs to all the other grid sites • membership will be maintained by ZEUS R. Mankel, ZEUS & the Grid

  12. What we will need from DESY-IT (cont’d) • Operation of a suitable grid core service RB, RC, BDII, UI (presently LCG2) • production level. Uninterrupted by development studies • will require separate production & development systems R. Mankel, ZEUS & the Grid

  13. What we will need from DESY-IT (cont’d) • Active representation of experiment’s issues in relevant bodies • D-Grid / GermanGrid, LCG, ... CAs • It would be desirable to have also a central DESY-based computing site (SE/CE/WN) of non-negligible size • multiple-VO common farm? R. Mankel, ZEUS & the Grid

  14. Visit of M. Lamanna • Massimo Lamanna will be here next Monday/Tuesday for a presentation in the Computing Seminar (Mo 16:00, SR3) • please attend the seminar R. Mankel, ZEUS & the Grid

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