HTCondorWiki: How To Disable Preemption

How to disable preemption

Known to work with HTCondor version: 7.0

There is a good section in the HTCondor Manual describing this topic here. Also see How to suspend jobs instead of killing them.

Here is an example drawn from real life that is slightly more complicated than what is in the manual section on preemption policy.

MaxJobRetirementTime = (IsDesktop =!= True && User =!= "glidein@hep.wisc.edu") * \
                       ( (OSG_VO =?= "uscms") * 3600*24  + \
                         (User == "osg_cmsprod@hep.wisc.edu") * 3600*24*3 )

# In case of graceful restart when HTCondor is being upgraded, wait for as
# long as the largest possible value of MaxJobRetirementTime before switching
# to a fast restart (which results in hard-kill signals).
# 3600 * 24 * 4
SHUTDOWN_GRACEFUL_TIMEOUT = 345600

This example assumes that desktop machines advertise a ClassAd attribute IsDesktop=True. On such machines, when jobs need to be preempted (e.g. by the machine user), they are preempted immediately. Jobs belonging to a glidein user are also preempted immediately, because unless they are sent a kill signal, they will always run indefinitely, not just until the current job finishes. Jobs belonging to the USCMS virtual organization are given 1 day to finish (from the time the job started) before preemption results in kill signals being sent. Jobs belonging to the osg_cmsprod user are given 3 days to finish (plus 1 day because they also belong to the "USCMS" virtual organization).