BatchSystem

The cluster use the Torque (PBS) batch system with the Maui scheduler.

Torque is installed to use /var/spool/PBS.

The Maui scheduler is installed on lychee in /usr/local/maui. The configuration file is /usr/local/maui/maui.cfg

Job priority is primarily by Fairshare with some assistance for longer waiting jobs.

Node allocation policy attempts to allocate all job nodes from the same hardware type. Nodes may be shared by default, but users may override this. Job pre-emption (bumping running jobs out the way) is supported for some client groups.

Note Clients generally submit via wrapper scripts that direct the jobs to hardware specific queues, thus generally pre-empting any maui node allocation.