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Distributed DB Services – View on Communications

Distributed DB Services – View on Communications. Maria Girone, IT-DM CCRC’08 F2F – April 1 st 2008. Overview. This talk focuses on DB-related services (experiment, Grid) LFC, FTS, conditions, experiment applications – e.g. DDM, PhEDEx, .., also SAM / GridView, …

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Distributed DB Services – View on Communications

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  1. Distributed DB Services – View on Communications Maria Girone, IT-DM CCRC’08 F2F – April 1st 2008

  2. Overview • This talk focuses on DB-related services (experiment, Grid) • LFC, FTS, conditions, experiment applications – e.g. DDM, PhEDEx, .., also SAM / GridView, … • These are (largely speaking) among the services ranked by the experiments as (Highly) Critical and are hence on the ‘critical path’ for CCRC’08 and any other production activities • It does not cover (external) ‘Grid infrastructure’ DB-usage • GOCDB, CIC portal, … Communication in DBs- 2

  3. DB services at Tier0 • Information regarding setting-up, configuring, upgrading and supporting the DB services at Tier0 • mailing list with the experiments/WLCG DB responsible for general announcements (mgt-physics-database@cern.ch) • direct contact to the experiments/WLCG services DB coordinators and application developers • Support at phydb.support@cern.ch • Up-to-date list maintained in Physics DB service wiki (https://twiki.cern.ch/twiki/bin/view/PSSGroup/PDBContacts) • DB sessions at 3D and WLCG workshops • DB resource requests and allocation • Experiments DB and WLCG services coordinators Communication in DBs- 3

  4. DB services at Tier0 (2) • ATLAS • direct contact with offline and online DB coordinators (H. Von Der Schmitt, R. Hawkings, S. Vanyashin) and with the ATLAS DBAs (G. Dimitrov, F. Viegas) • regular attendance at the ATLAS DB meetings • regular attendance from ATLAS at the 3D operations meetings • CMS • direct contact with the offline and online DB coordinators (D. Schlatter, P. Paolucci, F. Glege) and CMS DBAs (B. Sulmanas, P. Picca) • regular attendance at the CMS DB meetings and at the CMS/IT coordination meetings   • regular attendance from CMS/Frontier at the 3D operations meetings Communication in DBs- 4

  5. DB services at Tier0 (3) • LHCb • direct contact to the online and offline DB responsible (N. Neufeld, J. Closier) • regular attendance to the LHCb/IT coordination meeting • regular attendance from LHCb at the 3D operations meetings   • WLCG • direct contact to the WLCG Service Coordination team (H. Renshall, J. Shiers) • regular attendance to joint operations, LCG service coordination and CCRC'08 meetings  • ALICE • direct contact with the offline and online DB responsible (L. Betev, P. Chochula) and ALICE online DBA (S. Kupusta) Communication in DBs- 5

  6. Communication with Tier1s • Mailing list for announcements/discussions/problems (grid-service-databases@cern.ch) • 3D meetings (every two weeks) • Tier0 and Tier1 DBAs • Experiments DBAs and developers • Wiki pages (https://twiki.cern.ch/twiki/bin/view/PSSGroup/LCG3DWiki) • Up-to-date list of database interventions/outages • 3D workshops (also in conjunction with the WLCG workshops) Communication in DBs- 6

  7. Some points to discuss • Hardware requirements and evolution not always clear – long lead times for acquisition and power / space constraints! • DB view  Service view  User view – are these always understood? Can we improve information flow(s)? • DB house-keeping operations: “transparent” interventions are still often done in an un-scheduled manner on production services – has resulted in service instability and even prolonged downtimes… Communication in DBs- 7

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