HTCondor or Condor is the job scheduling system widely used in CMS. Some helpful resources and guides are listed below:

• https://research.cs.wisc.edu/htcondor/
• http://batchdocs.web.cern.ch/batchdocs/local/quick.html
• http://batchdocs.web.cern.ch/batchdocs/troubleshooting/index.html