When supported by the resource manager, Moab can suspend and resume jobs. A user can suspend his/her own jobs, but only an administrator can resume them. By default, a job is suspended for one minute before it can resume. You can modify this default time using the MINADMINSTIME parameter.

A job must be marked as suspendable for Moab to suspend and resume it. To do so, either submit the job with the suspendable flag attached to it or configure a credential to pass the flag to its associated jobs. These methods are demonstrated in the examples below:

msub -l flags=suspendable

GROUPCFG[default] JOBFLAGS=SUSPENDABLE

Once the job is suspendable, Moab allows you to suspend jobs using the two following methods: (1) manually on the command line and (2) automatically in the moab.cfg file.

To manually suspend jobs, use the mjobctl command as demonstrated in the following example: 

> mjobctl -s job05

If you are an administrator and want to resume jobs, use the mjobctl command as demonstrated in the following example:

> mjobctl -r job05

You can also configure the Moab preemption policy to suspend and resume jobs automatically by setting the PREEMPTPOLICY parameter to SUSPEND. A sample Moab configuration looks like this: 

PREEMPTPOLICY SUSPEND
...
USERCFG[tom] JOBFLAGS=SUSPENDABLE

Moab suspends jobs submitted by user tom if necessary to make resources available for jobs with higher priority.

If your resource manager has a native interface, you must configure JOBSUSPENDURL to suspend and resume jobs.

For more information about suspending and resuming jobs in Moab, see the following sections:

• manual preemption with the mjobctl command
• Job preemption