ExplainingApel
From HTCondor job history files to batch and blah files
Each time a job is finished, a job record is created in the directory /var/lib/condor/history.
Thanks to a systemd timer, every hour, a script is run to parse these history records and to generate the blah and batch files from them. The blah and batch files are created in the directory /var/lib/condor-ce/apel.