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LHCbDirac and Core Software

LHCbDirac and Core Software. Running Gaudi Applications on the Grid. Application deployment CVMFS on all Tier1s (but Gridka ) and a few Tier2s Pushing for it (GDB) Other sites: mostly NFS or GPFS Installation done with install_project in dedicated jobs

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LHCbDirac and Core Software

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  1. LHCbDirac and Core Software

  2. Running Gaudi Applications on the Grid • Application deployment • CVMFS on all Tier1s (but Gridka) and a few Tier2s • Pushing for it (GDB) • Other sites: mostly NFS or GPFS • Installation done with install_project in dedicated jobs • If SW not available, local installation in the job • Support for dual installation (shared / local) mandatory • Other use case: running ROOT in LHCbDirac • Need to set up environment • Tell user to “SetupProjectLHCbDirac ROOT” • Set it up internally: currently broken by dual installation changes • LHCbDirac is also deployed on the Grid and CVMFS • Not used (yet) by jobs, but by users • Application support • Can we be more generic, i.e. support any Gaudi Application? • Support random application? • Support for just ROOT: SetupProject ROOT? Core Software workshop, PhC

  3. Extra packages, AppConfig • First sight, all OK now • Versions fixed in step manager • Dynamic SQLite installation (see yesterday’s talk from MCl) • Transparent? • Additional options (set up by LHCbDirac) • Input dataset • Output dataset • Special options • Setting time stamps, defining MsgSvc format • Should LHCbDirac know about them? • Should AppConfig contain templates with just placeholders • E.g. file name replaced by actual name by Dirac, e.g. • @BHADRONFileName@ to be replaced with 00001234_0012.bhadron.dst • Mechanical operation rather than “knowledge” Core Software workshop, PhC

  4. Job finalization • LHCbDirac needs information from the application • Success / failure ! • Bookkeeping report • Nb of events processed • Nb of events per output stream, GUID (also on catalog) • Memory used, CPU time? • Production system • Files successfully processed • Failed files • Event number of crash? • Most (all) information now in XML summary reports • XML summary browsing implemented (Mario) • Needs thorough testing in jobs (already tested with many cases) • Get rid (!) of AnalyseLogFile… • Any specific requirements for MC simulation? • Should info be added to BK? Core Software workshop, PhC

  5. Bookkeeping • Is there enough information? • Can it be used for producing reports (e.g. performance benchmark)? • Accessing metadata from within a job: • Use case: determine the DDDB to be used for MC • Would BK sustain the load? • Where to query: jobs, BK GUI, ganga? • What if more than one in the dataset? • User job bookkeeping? • Is it worth investing? • Definition of requirements Core Software workshop, PhC

  6. Step manager and production requests • Is the interface adequate? • Reco / Stripping: production manager mostly • MC: WG representatives, Gloria • Is it a limitation that the Condition should be in the BK for creating a request? • E.g. prepare a reconstruction production before data is available? • Can this be avoided? • Is the request progress monitoring OK? • Currently when enough events are in BK, one kills jobs and deletes files • Is this useful? Should we just let go and flush? • Disk extra usage vs wasted CPU Core Software workshop, PhC

  7. Tools for users • Not directly for Core Software but… education! • How to get a proper PFN? • Too many users of PFN:/castor/cern.ch/… • Triggers a disk 2 disk copy to a smallish pool (overload) • Should be root://castorlhcb.cern.ch/ • Currently available: • PFNs from BK GUI • CLI tools: to be improved to get directly the PFN at a site • Resurrect genXMLCatalog and include in LHCbDirac • Documentation and Education! • How to replicate datasets? • To local disk • To shared SE • Tools exist but are not streamlined nor documented Core Software workshop, PhC

  8. Software tools • Synergy between LHCbDirac and Core Software • Eclipse • SVN vsgit • Why are branches / merging a nightmare for LHCbDirac and not for Core SW? • Savannah vs JIRA • Benefit from the CS and Applications’ experience • Is LHCbDirac that different? • Is packaging a bonus or a nuisance? Monolithic vs packages • Is getpack useful? How to couple it with Eclipse? • Setup the environment from Eclipse working area • Can one use SetupProject to get LHCbDirac on WNs? • LHCb private pilot jobs • Any particular requirement? • For LHCbDirac services and agents: • How to get a controlled Grid environment without doing GridEnv? Core Software workshop, PhC

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