Administering Platform LSF - SAS

Chapter 34
Running Parallel Jobs
Examples
Maximum
processor limit
PROCLIMIT is specified in the default queue in lsb.queues as:
PROCLIMIT = 3
The maximum number of processors that can be allocated for this queue is 3.
Example
Minimum and
maximum
processor limits
Minimum, default,
and maximum
processor limits
Description
% bsub -n 2 myjob The job myjob runs on 2 processors.
% bsub -n 4 myjob The job myjob is rejected from the queue because it requires more
than the maximum number of processors configured for the queue (3).
% bsub -n 2,3 myjob The job myjob runs on 2 or 3 processors.
% bsub -n 2,5 myjob The job myjob runs on 2 or 3 processors, depending on how many
slots are currently available on the host.
% bsub myjob No default or minimum is configured, so the job myjob runs on 1
processor.
Example
PROCLIMIT is specified in lsb.queues as:
PROCLIMIT = 3 8
The minimum number of processors that can be allocated for this queue is 3
and the maximum number of processors that can be allocated for this queue
is 8.
Description
% bsub -n 5 myjob The job myjob runs on 5 processors.
% bsub -n 2 myjob The job myjob is rejected from the queue because the number of
processors requested is less than the minimum number of processors
configured for the queue (3).
% bsub -n 4,5 The job myjob runs on 4 or 5 processors.
myjob
% bsub -n 2,6 The job myjob runs on 3 to 6 processors.
myjob
% bsub -n 4,9 The job myjob runs on 4 to 8 processors.
myjob
% bsub myjob The default number of processors is equal to the minimum number (3).
The job myjob runs on 3 processors.
Example
PROCLIMIT is specified in lsb.queues as:
PROCLIMIT = 4 6 9
◆ Minimum number of processors that can be allocated for this queue is 4
◆ Default number of processors for the queue is 6
◆ Maximum number of processors that can be allocated for this queue is 9
Description
% bsub myjob Because a default number of processors is configured, the job myjob
runs on 6 processors.
Administering Platform LSF 449