LHCb Core Software Meeting

Date and Location

May, 7 2008
10:30 - 12:15
CERN (2-R-030)


Gloria, Hubert, Marco Ca., Marco Cl. (minutes), Philippe





  • Stefan is preparing a slot in the nightlies to use ROOT-patches and the de-SEALed LCG stack.

Software Releases

Gaudi (Marco Cl.)

  • Announced to the gaudi-talk mailing list the plan to have a last Gaudi v19 feature release at the end of May. That release has to be based on the de-SEALed LCG stack.
  • Patch #1794 (update GaudiPoolDb to de-SEALed POOL) has been applied and a tag for the back-ward compatible Gaudi has been prepared (GAUDI_patches). Stefan is going to use it in the nightlies.

LHCb, Boole, Brunel (Marco Ca.)

  • A version of LHCb/Brunel working with new STDet available in DEV.
    • Meeting with ST people tomorrow morning to summarize the status (Marco Ca. and Marco Cl. will participate).
  • Meeting to summarize the status of the MagneticFieldSvc in the afternoon (Gloria, Marco Ca. and Marco Cl. will participate).
  • OT decoding not yet available.
    The decoding is in CVS, but the encoding does not work.

Philippe commented that it is not planned to test the software with the 2008 geometry before real data. The alignment should be exercised too, starting from MDF files going from the PIT to Tier-1s.

Gauss (Gloria)

  • Which tag should be used for tests? The available tags can be found in the release notes of SQLDDDB. The latest good head tag is head-20080422 (based on the previous head-no-TT).

Round Table

Prepared comparison between Gauss speed and SPECINT/SPECFP marks for the benchmarking meeting. The Gauss performances look more correlated to the integer based benchmarks.
The exercise will be repeated with Brunel and DaVinci, using the generic script the Hubert prepared.
Marco Cl.
  • Working on the XML versions database to present it in a HTML page using stylesheets (XSL). It is simple to do it and the formatting is done by the browser without the need of any external tool. It has been suggested to have the tags used for releases (DC06, etc.) in the versions DB too.
  • Which is the status of the archiving tool? No progress.
  • Documentation for the projects DBASE and PARAM is still a problem. It has been proposed to take the packages out of the projects and make them projects (decfiles, SQLDDDB, etc.)
  • What about the plan of having the particle properties in the conditions database?
    Marco Cl. do not remember if he committed the changes to CVS or not. He will check.
Marco Ca.
the proposal of supporting overlay of events circulated recently in the physics group, what should the Core Software Group should do?
After some discussion it seems clear that we have to push to have algorithms to merge raw banks. The particle gun generator can be modified to take the initial position from the primary vertex in the transient store. Then we can think of an application that puts together Gauss and Brunel.
  • dcache problem in NIKHEF observed with version 1.8.0 (LCGCMT 54e). It may be related to firewall issues between NIKHEF and SARA.
  • The bookkeeping database features an entry for a version number attached to files. It might be useful to have the compatibility information in the version database.
    Based on "file type" + "version" it should be possible to:
    • find which version of the software was used to produce the file
    • find which version of the software can be used to read the file
    • given the version of the software, discover the readable file versions Marco Cl. will think about how to introduce those informations into the XML database of versions (based on the web page maintained by Marco Ca.).

-- MarcoClemencic - 07 May 2008

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