Queues and Reservations

Here are the queues available on Glenn. Please note that you will be routed to the appropriate queue based on your walltime and job size request.

Name Nodes available max walltime max job size notes


Available minus reservations

168 hours

1 node



Available minus reservations

336 hours

1 node

Restricted access


Available minus reservations

96 hours

256 nodes



Entire cluster

48 hours

436 nodes

Restricted access

"Available minus reservations" means all nodes in the cluster currently operational (this will fluctuate slightly), less the reservations listed below. To access one of the restricted queues, please contact OSC Help. Generally, access will only be granted to these queues if performance of the job cannot be improved, and job size cannot be reduced by splitting or checkpointing the job.

In addition, there are a few standing reservations.

Name Times Nodes Available Max Walltime Max job size notes
Debug 8AM-6PM Weekdays 16 1 hour 16 nodes For small interactive and test jobs.
GPU ALL 32 336 hours 32 nodes

Small jobs not requiring GPUs from the serial and parallel queues will backfill on this reservation.

Occasionally, reservations will be created for specific projects that will not be reflected in these tables.