Submitting Python Scripts to the Grid

T.Ruf    Friday, August 10, 2007

• Requires a grid certificate, see lcg registration
• Prepare a job for Ganga based on DaVinci_Ganga.py template. Main things to enter:
  • Define which application, DaVinci() or Panoramix() (Panoramix not yet there, but will come hopefully)
    myApplication = DaVinci()
  • Define version to use
    myApplication.version ='v19r4'
  • Give name of optsfile which contains the list of LFNs
    myApplication.optsfile = File ( '~/grid/EventsLFN.opts' )
  • Name of python script to be put in inputsandbox and additional input files
    myInputsandbox = ['~/grid/SelectEvents.py','~/grid/events.lst']
  • use Dirac as backend
    myBackend = Dirac()
• Example job
• On lxplus, start Ganga
  • GangaEnv
  • ganga
    will ask you for your certificate
  • execfile('Ganga_select.py')
  • Information about jobs can be displayed with jobs or via the Dirac monitor page
  • output will be in  ~/gangadir/workspace/Local/"jobid"/"subjob"/output/

Ganga mailing list: lhcb-distributed-analysis@cern.ch