Known to work with HTCondor v8.6.0 or later.
Append the following to the condor_config[.local] on your pool's central manager node:
# Change the value of NEGOTIATOR_PRE_JOB_RANK from the default # value (which is mostly best-fit) to a value that will tend to fill up # all the slots on a server before moving to another. # The expression below states the following: # 1) First sort jobs first according to machine rank. # 2) Next prefer slots that are unclaimed (idle) over slots # that are already running a job. # 3) Next, prefer to use the highest slot number. This will # fill machines depth first, and is what we are adding here to the default. # 4) Finally, to break ties, do best fit on CPU and Memory. NEGOTIATOR_PRE_JOB_RANK = (10000000 * My.Rank) + \ (1000000 * (RemoteOwner =?= UNDEFINED)) + \ (100000 * SlotId) + \ (-10000 * Cpus) - Memory # If execute nodes are using partitionable slots, SlotId is always # equal to 1, so this knob # will state we want to fill fill depth first. See http://tinyurl.com/y75k3k7p NEGOTIATOR_DEPTH_FIRST = True