Running CRAB at the LPC cluster

There are many instrucctions and tips around. Watch out, some of them are out of date. In my case this is what I have done in order to be able to submit jobs to the LPC Analysis cluster.

* In case you are beginner, you will need to follow the instruccions at the US CMS site Connect to LPC cluster.

Preliminaries

  • Eventhough you will submit directly to a Condor batch queue system, you need to have a valid grid certificate and VO=cms. CRAB will request you to authenticate

Configuration

  • As instructed in this page, you need to set your personal ~/.profile file (no matter if you use a cshell) with the following command:

echo "source /uscmst1/prod/sw/cms/shrc prod" > ~/.profile

  • Set the CMSSW, Grid and CRAB environment. For this part, I have set these alias inside my .cshrc file:

# individual configuration
alias cmsswEnv 'source /uscmst1/prod/sw/cms/cshrc prod'
alias crabEnv 'source /uscmst1/prod/grid/CRAB/crab.csh'
alias gridEnv 'source /uscmst1/prod/grid/gLite_SL5.csh'

# all at once
alias setAll 'crabEnv; gridEnv; cmsswEnv'

Example

The following is a very basic example of a CRAB configuration file:

[CMSSW]
pset                    = tutorial.py
datasetpath             = /MinimumBias/Run2012C-HLTPhysics-24Aug2012-v1/RAW-RECO
output_file             = outfile.root
lumis_per_job           = 10
total_number_of_lumis   = 100
# total_number_of_lumis   = -1  # all lumis available

[USER]
ui_working_dir         =  crab_B
return_data             = 1
copy_data               = 0

[CRAB]
scheduler               = condor
jobtype                 = cmssw

Excecution of such job was done under CMSSW_5_3_4.

The data has to be located locally at the LPC. You can check this by going to DAS.

  • Notice that the scheduler is set to condor.
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Topic revision: r2 - 2013-01-10 - AndresOsorio
 
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