LHCb Core Software Meeting

Date and Location

25-Jan-2012

Attendees

Subjects

News

• TEG Summary Workshop in Amsterdam
  • Monday was devoted to Deployment
    Agreed to make CVMFS a requirement for all sites, but worries about the amount of cache used and how often is invalidated (e.g. for our conditions)
• ITUM on the 2nd of February
• Intel/OpenLab Performance Workshop February 15th-16th
• Deadline for Summer Student projects is the 7th of February
  • The projects should be added as savanna tasks under LHCb physics software, so that they can be reused if not assigned.

Round Table

Marco Cl.

• Tagged Gaudi v23r0
  • since last week: updated RootCnv, added 'pseudo' CMTCONFIG '*-test' (equivalent to '*-opt', but for extra tunings), added locks (thread-safety) in ServiceManager::service (Illya)
  • Marco Ca.: it is not tested in the nightlies; Marco Ca. will update the configuration to use the new tag in lhcb-head (to be checked the status of gcc4.6).
  • Marco Ca.: it is not possible/easy to view the release notes of Gaudi until the release.
    Marco Cl. will prepare the release web page immediately and think about a better way for later
• Problems with ROOT head since Saturday (bug #90762, bug #90875)

Marco Ca.

• Planned release of LHCb next week
• Issue with incidents fired twice, by RootCnvSvc and IODataManager. We need consolidation in the error/incident handling sector.
• Update on the Programme of Work
  • Prepared a twiki page accessible from the LHCbComputing page ProgrammeOfWork (not yet announced)
  • We should review the tasks and set new priorities every 3 months (more or less)
• Rob sent a document on Tag Collector requirements.

Illya

• CondDB Deployment
  • the automatic update of the http pages has been running for the last 36 hours, with automatic installation on CVMFS
  • Marco Cl. we can trigger the installation on grid shared areas of SQLDDDB v7r2 to pre-heat local copies.
  • Marco Ca. we can produce a patched version of DaVinci, using SQLDDDB v7r*, and start a test production before enabling the new system for every job.
• GaudiParallelizer (a sequencer that executes algorithms in parallel)
  • prototype ready to be committed to SVN, to which package? either GaudiPatches or a new package

Ben

• Contacted by IT to know the contact person in LHCb to coordinate the migration of the CVMFS installation machine.
• Profiling
  • we can gain few % with gcc 4.6 and few more with -O3
  • setting up to use the new '*-test' CMTCONFIG
  • we need better reporting of the profiling to make it easier to run more iterations
• Monitoring
  • Stefan mentioned that somebody wrote Lemon sensors for the nightlies, which might be resurrected (to check)
  • we may use a combination of SLS and Lemon for our monitoring
  • Marco Ca.: collaborate with Stefan, who is reviewing the production monitoring (we may re-use the same infrastructure)
• LHCb Deployment savannah
  • will remove obsolete platforms and add the new ones.
• CVMFS on lxplus
  • we need testing on a controlled environment before making the change public. We can use an IT virtual machine.
• Clean up of LbScripts savannah backlog
  • discussed with Rob and Patrick (main customers) what could be closed and what is low priority.

Markus

• Soon start debugging deferred HLT

Thomas

• Need to discuss with Joel to get some TCP ports open on the build servers for the monitoring
• Marco Ca.: do we have enough resources to add the new platforms? (gcc46) It should not be a problem.

-- MarcoClemencic - 25-Jan-2012