LSF Version 7.3 - Administering Platform LSF

Administering Platform LSF 517
Running Parallel Jobs
Job 2:
Submitting a second job with same requirements get the same result.
Job 3:
Submitting a third job with same requirements reserves one job slot, and reserve all
free memory, if the amount of free memory is between 20 MB and 200 MB (some
free memory may be used by the operating system or other software.)
Job 4:
bsub -W 400 -q backfill -R "rusage[mem=50]" myjob4
The job keeps pending, since memory is reserved by job 3 and it runs longer than
job 1 and job 2.
Job 5:
bsub -W 100 -q backfill -R "rusage[mem=50]" myjob5
The job starts running. It uses one free slot and memory reserved by job 3. If the job
does not finish in 100 minutes, it is killed by LSF automatically.
Job 6:
bsub -W 100 -q backfill -R "rusage[mem=300]" myjob6
The job keeps pending with no resource reservation because it cannot get enough
memory from the memory reserved by job 3.
Job 7:
bsub -W 100 -q backfill myjob7
The job starts running. LSF assumes it does not require any memory and enough
job slots are free.
Parallel jobs Each process of a parallel job requires 100 MB memory, and each parallel job needs
4 cpus. The first two of the following parallel jobs run for 300 minutes.
Job 1:
bsub -W 300 -n 4 -R "rusage[mem=100]" -q reservation myJob1
The job starts running and use 4 slots and get 400MB memory.
Job 2:
Submitting a second job with same requirements gets the same result.
Job 3:
Submitting a third job with same requirements reserves 2 slots, and reserves all 200
MB of available memory, assuming no other applications are running outside of
LSF.
Job 4:
bsub -W 400 -q backfill -R "rusage[mem=50]" myJob4
The job keeps pending since all available memory is already reserved by job 3. It
runs longer than job 1 and job 2, so no backfill happens.
Job 5:
bsub -W 100 -q backfill -R "rusage[mem=50]" myJob5
This job starts running. It can backfill the slot and memory reserved by job 3. If the
job does not finish in 100 minutes, it is killed by LSF automatically.