Platform LSF Administration Guide Version 6.2

How Deadline Constraint Scheduling Works For Parallel Jobs
Administering Platform LSF
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How Deadline Constraint Scheduling Works For
Parallel Jobs
For information about deadline constraint scheduling, see “Using Deadline Constraint
Scheduling” on page 248. 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 will
take.
LSF assumes that the minimum number of processors will be used, and that they will all
be the same speed as the candidate host. If the job cannot finish under these conditions,
LSF will not place the job.
The formula is:
(deadline time - current time) > (CPU limit on candidate host / minimum number of
processors)