LHCb Core Software Meeting

Date and Location

10:30 - 12:00
CERN (2-R-030)


Andrea Valassi, Ben Couturier, Concezio Bozzi, Gloria Corti (Vidyo), Illya Shapoval, Joel Closier, Liang Sun, Marco Cattaneo, Marco Clemencic (minutes), Markus Frank, Riccardo Cenci (Vidyo), Roel Aaji


Discussion on Git based workflows

Marco Cl. will draft a document with details of the plan.

Round Table

Marco Cl.

  • Investigated the poor performance of Stripping configuration (LHCBPS-1472)
    • reduced Stripping24 configuration time from 445s to 132s
    • still some time to be gained (~10-30s) in the conversion of options to strings for the JobOptionsSvc
  • Added the possibility of running nightly build tests compiled for SLC6 on CentOS7

Marco Ca.: what are the plans for the beginning of the year

  • default gcc49 to be enabled the first week of January (to be announced)
  • new ROOT version, still problems in the nightlies because of an issue in Gaudi (?)


  • Bugs in ROOT 6.06 affecting COOL, fixed in the branch (but not in the 6.06.00 release).


  • Improvements in /cvmfs/lhcbdev.cern.ch
    • slots installed as soon as available
    • proper garbage collection policy
    • it should become the default way of sharing nightly builds with developers
  • Planning to use RabbitMQ for message passing between nightly builds and installation and more
  • Working on Genat4.10
    • Marco Cl. drafted git-based workflow for Geant4 (presented yesterday)
    • Applied our patches to Geant4.10
  • Daily tests of HLT rates
  • Working with Sasha to get LHCbPR2 in production
  • Working with Marco Cl. to get rid of the CMT-based deployment for LbScripts
    • Marco Cl. suggested to make a dev release this week (with default config to gcc49) to be switched to prod in January


  • Beginning of January we will have a presentation of of the Knowledge Transfer Group on how we can display the content of Ariadne using their tools.


  • Issue with Gauss in the nightlies with LCG 79 because of the problem with the compilation flags of LHAPDF (GENSER-421).
    • Marco Cl. will ask GENSER developers to have the fixed version of LHAPDF in LCG 79

-- MarcoClemencic - 2015-12-16

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Topic revision: r2 - 2015-12-16 - MarcoClemencic
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