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CMS/LCG-0 architecture

CMS/LCG-0 architecture. Many authors…. CMS/LCG- N testbed. CMS/LCG-0 is a CMS-wide testbed based on the LCG pilot distribution (LCG-0) , owned by CMS Red Hat 7.3 (7.3. 2 with CERN kernel recommended) Components from VDT 1.1.6 and EDG 1.4.X (LCG pilot)

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CMS/LCG-0 architecture

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  1. CMS/LCG-0 architecture Many authors… CMS-ARDA Workshop

  2. CMS/LCG-N testbed • CMS/LCG-0 is a CMS-wide testbed based on the LCG pilot distribution (LCG-0), owned by CMS • Red Hat 7.3 (7.3.2 with CERN kernel recommended) • Components from VDT 1.1.6 and EDG 1.4.X (LCG pilot) • Components from DataTAG (GLUE schemas and info providers) • Virtual Organization Management: VOMS • RLS in place of the replica catalogue (uses rlscms by CERN/IT!) • Monitoring: GridICE by DataTAG • R-GMA (as BOSS transport layer for specific tests) • Dynamic: install+test new components useful to CMS • Support (outside CMS) • DataTAG WP4 • LCG Experiment Integration and Support (EIS) team • Currently configured as a CMS RC and producing data for PCP It allows us to do our software integration while LCG-1 is not out!!! CMS-ARDA Workshop

  3. CMS/LCG-0 sites ~170 CPU’s CMS-ARDA Workshop

  4. CMS/LCG-0 as a CMS Regional Center Computer farm DAG job job job job User’s Site (or grid UI) Resources Production Manager defines assignments shell scripts RefDB Phys.Group asks for an official dataset Local Batch Manager CMS LCG-0 JDL LCG Scheduler Site Manager starts an assignment MCRunjob +ImpalaLite or CMSProd USCMS testbed DAGMan (MOP) User starts a private production Chimera VDL Virtual Data Catalogue Planner CMS-ARDA Workshop

  5. CMS/LCG-0 PCP setup Job output filtering Runtime monitoring CE CE CE CE parameters CMS software CMS software CMS software CMS software SE JDL data registration LFN Push data or info WN Pull info Job management SE BOSS DB RefDB UI CMSProd/ MCRunbjob +BOSS Workload Management System SE input data location SE CE cmsrls SE Data replication SE BOSS DB CERN SE SE UI cmsrls SE CMS-ARDA Workshop

  6. Outcomes • 4 UI’s testing different production tools • McRunjob/ImpalaLite (Bari, Bologna) • complex! But consistent with “official” environment • CMSProd (Padova, Ecole Poly.) • simple! • Testbed is quite stable • 500 Kevts “heavy” CMKIN (8h/job(250 evts); ~20 GB) • 500 Kevts CMSIM in production (350 Kevts/week; ~320 GB) • Operates as a CMS Regional Centers • need to interact with existing environment, e.g.: • not grid-aware comm. to/from RefDB: e-mail • not grid-aware data transfer tools: SRB bridge at CERN • much more consistent architecture if we had only grid components! • Only production services (no user analysis) CMS-ARDA Workshop

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