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REDDnet & CMS T3 Users

REDDnet & CMS T3 Users. Daniel Engh Vanderbilt University Oct 23, 2008. REDDnet distributed storage. Distributed Data depots -- based on IBP protocol. Tier 2, Tier 3, or OSG site. CMSSW job Running remotely. Subscribe to CMS datasets, injest via gridFTP gateway. REDDnet. depots.

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REDDnet & CMS T3 Users

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  1. REDDnet & CMS T3 Users Daniel Engh Vanderbilt University Oct 23, 2008

  2. REDDnet distributed storage Distributed Data depots -- based on IBP protocol Tier 2, Tier 3, or OSG site CMSSW job Running remotely Subscribe to CMS datasets, injest via gridFTP gateway REDDnet depots PhEDEx / GridFTP gateway CMS Root Analysis running on local system CMS User

  3. CMS Standard Interfaces • File Movement • Gridftp/SRM/Phedex • Gridftp/L (REDDnet DSI backend) • Usage: gsiftp://gridftp.reddnet.org/LFN • Event-data streaming • Root I/O • File/XRootD • Root/L (reddnet root-posix plugin) • Usage: TFile::Open(“lodn://lodn.reddnet.org/LFN”) • Security • Grid certificates/VOMS to write/manage data • Root read-only streaming access currently open

  4. REDDnet depots in action …

  5. CMS Use Cases • Automatic Reddnet access • T3 site configured with REDDnet backend • Vanderbilt set up • Data registered with Phedex • Jobs submitted via CRAB • User Configured • Uploads data • Plans replication strategies • Configures jobs • Minimal local hardware requirements

  6. Demo of CMSSW running on REDDnet ….

  7. Deployment status & plans • Depots: 200 TB @ 8 sites • 500TB additional planned • REDDnet T3 site • Vanderbilt • T3 test group • Caltech, UFL • General availability for interested T3 users • Jan 2009 • Future: • Async tools • More flexible data distribution

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