Notes For Cms Data Analysis School Pre Exercises#3

Notes for CMS Data Analysis School Pre-Exercises

Making sure you have a CERN Grid Account before you reading this!

Setup CRAB

Add

source /cvmfs/cms.cern.ch/crab3/crab.sh

to you bash_profile.

Then use

crab checkwrite --site=T2_CN_Beijing

to check whether you can operate on servers in Beijing.

Use CRAB to submit you job(s)

This is an example of configuration file used by crab:

from WMCore.Configuration import Configuration
config = Configuration()

config.section_("General")
config.General.requestName = 'CMSDAS_MC_generation_test0'
config.General.workArea = 'crab_projects'

config.section_("JobType")
config.JobType.pluginName = 'PrivateMC'
config.JobType.psetName = 'CMSDAS_MC_generation.py'
config.JobType.allowUndistributedCMSSW = True

config.section_("Data")
config.Data.outputPrimaryDataset = 'MinBias'
config.Data.splitting = 'EventBased'
config.Data.unitsPerJob = 10
NJOBS = 10  # This is not a configuration parameter, but an auxiliary variable that we use in the next line.
config.Data.totalUnits = config.Data.unitsPerJob * NJOBS
config.Data.publication = True
config.Data.outputDatasetTag = 'CMSDAS2018_CRAB3_MC_generation_test0'

config.section_("Site")
config.Site.storageSite = 'T2_CN_Beijing'

Then execute

crab submit -c crabConfig_MC_generation.py

You can use crab status -d <CRAB-project-directory> --long to check if there are any errors in you jobs.

Once you find any failed jobs, you can use crab resubmit -d <CRAB-project-directory> --jobids <jobids,jobidA-jobidB> to resubmit failed jobs.

How to fetch your data

1. DAS

You will find your data published in DAS with name the same as “Output dataset”.Then you can refer to your data by URL provided by DAS.

1. IHEP

You can find your data in the path /pnfs/ihep.ac.cn/data/cms/store/user/your_user_name in servers in IHEP.