Deadline constraint scheduling is enabled by default.

If deadline constraint scheduling is enabled and a parallel job has a CPU limit but no run limit, LSF considers the number of processors when calculating how long the job takes.

LSF assumes that the minimum number of processors are used, and that they are all the same speed as the candidate host. If the job cannot finish under these conditions, LSF does not place the job.

The formula is:

(deadline time - current time) > (CPU limit on candidate host / minimum number of processors)