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Storage and Data Management - Background. Jens Jensen, STFC. guid:723ce86b-8e2f-4b6e-97cb-db2fb1622a66. Pics from Yesterday. Overview.

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overview
Overview
  • “Support the deployment and operation of Grid storage and data management middleware to enable every GridPP site to meet the needs of the its users and the site’s obligations”
  • Storage and Data Managament Group
    • Three supporters – Wahid Bhimji (Ed), Sam Skipsey (Gla), Brian Davies (RAL)
    • “hard core” of ~15 people attending weekly meetings
    • ~70-80 people on mailing list (mostly T2s), from 10 dif. countries
    • Blog – http://gridpp-storage.blogspot.com/
    • Wiki – https://www.gridpp.ac.uk/wiki/
    • Contributions to WLCG (eg TEGs)
  • “Finding” the Higgs was useful
    • “We did that – and we support other research, too.”
technologies
Technologies
  • SRM
    • DPM
    • StoRM
    • dCache
    • (CASTOR)
  • Storage information systems
    • CIP and GIPs in BDIIs
  • Data movers
    • FTS
  • (Catalogues)
    • (LFC)
technologies1
Technologies
  • WebDAV (RFC4918) – HEP case is read only
    • (Study by C.T.Cirstea, Eindhoven)
    • Uses HTTP (RFC2616), adds a few commands
    • HEP: only using PROP commands
  • NFS4
    • Local access protocol
    • Instead of RFIO and DCAP
  • Future of SRM...
    • Data access
    • Data transfer
    • Data control
    • Data information
    • “Reserved space”
services for vos
Services for VOs
  • Help getting “onto the grid”
    • Often local (like Campus Champions, except more ad hoc)
    • Supporting VO data model
  • Syncat
  • Performance tuning
    • Storage systems
  • Large VOs and small VOs
    • ATLAS – fairly well represented
    • CMS – usu. via sites?
    • LHCb – “no data at T2s”
    • ALICE in T1/experiment meetings
    • Non-LHC VOs – Wedn. meetings
stuff
Stuff
  • Lots of expertise in the group
    • How do we best make use of it?
  • DPM support
    • See Wahid’s presentation
    • A Plan exists
  • Information Systems
    • Accuracy of publishing
    • The need for EGI-compliant GLUE 2 publishing
  • Supporting the experiments
  • Storage “federations”
  • Future data management
    • Lots of EU funded projects (and proposals)
    • Cloud storage – people will ask...