Maintenance script: Created page with " == How to submit jobs with crab == To submit jobs with Crab you have to do following steps: *Make sure that the CMS/Crab environment is set up === Setup the Crab env..."

2015-08-26T12:28:24Z

Created page with " == How to submit jobs with crab == To submit jobs with Crab you have to do following steps: *Make sure that the CMS/Crab environment is set up === Setup the Crab env..."

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== How to submit jobs with crab ==

To submit jobs with Crab you have to do following steps:

*Make sure that the CMS/Crab environment is set up

=== Setup the Crab environment ===
*login to a machine where the Crab software is installed
e.g:
<pre>
ssh -X <tt>whoami</tt>@master2.iihe.ac.be
</pre>
*setup the environment
**source the CMS environment
<pre>
setenv VO_CMS_SW_DIR /msa3/cmssoft
source $VO_CMS_SW_DIR/cmsset_default.csh ## initialize the cms env
</pre>
**source the Crab environment
<pre>
source /msa3/crab/latest/crab.csh
</pre>
*next go into your project directory and run eg (maybe replace scramv1 by scram and -sh by -csh)
<pre>
eval <tt>scramv1 runtime -csh</tt>
</pre>
*Note that you can writ this commands in your .cshrc file

=== Adjust the crab.cfg to your specific needs ===

*Go to your working directory and copy the example crab.cfg from the working directory:
<pre>
cp $CRABDIR/python/crab.cfg .
</pre>
*This file is the config for Crab
**This file has different sections indicated with '[]'
**[CMSSW]: CMSSW related: (number of events, cfg file, ...)
**datasetpath = [string that describes dataset]. You can find this on DBS discovery page.
**pset = [the name of the Pset which fits your code]. This is the config file which you use to a 'cmsRun' in an interactive run. Make sure it works before submitting to the grid
**output_file = [The name for your output file]. Important: be consistent with the name inside your pset. Of course you can give more then one (comma separated)
**total_number_of_events = [number of events you want to acces, -1 for all data]
**Crab will work out the right number of evts/jobs according to the user requests: evts/job or nomber of jobs
***events_per_job = [number of events accessed by a single job]
***numbers_of_jobs = [number of jobs you want to run]
**[USER]: user related: (where to store the output, ...)
**return_data = [0|1]: Send output_file with stdout, stderr to User interface
**copy_data = [0|1]: Copies output_file. If copy_data = 1, you have to specify storage_element = [name of the storage element to copy output files to] and storage_path = [path on the SE]. Important: crab makes the directory for you on the storage (if you have the permission), but the output file allready exists, the output file won't be written to storage.
**[EDG]: grid related: ...

=== Create and submit a crab job ===

*Before you can submit your job you have to prepare everything that is needed
<pre>
crab -create
</pre>
*This will create a directory crab_0_<date>_<time> which contains:
**job: contains CMSSW.cfg (config file for executable) and CMSSW.sh
**res: output from 'crab -getoutput' comes her (CMSSW_000001.stderr and CMSSW_000001.stderr)
**share: contains jobsubmission files and info
**log: contains log files with crab output

*Once everything is created you can submit the job. By default it will submit all the jobs, specify N: number of jobs you want to submit
<pre>
crab -submit <N> -c
</pre>

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Maintenance script: Created page with " == How to submit jobs with crab == To submit jobs with Crab you have to do following steps: *Make sure that the CMS/Crab environment is set up === Setup the Crab env..."