Limit number of jobs per node based on the available disk size
Problem: Jobs in a task are known to be very disk hungry - how to ensure that only one job of its kind ends up on a node?
Solution: make the job request 51% of a node's space
Request_disk = ifThenElse(isUndefined(TARGET.TotalDisk), 10485760, round(TARGET.TotalDisk * 0.51)
so that a second job's wish cannot be fulfilled by a node after accepting a first one.