The Center for Computational Science's SGI computing cluster uses Altair Engineering's PBS Pro Portable Batch System software. All jobs that require continuous cpu time must be run under PBS Pro. This will prevent the machine from becoming unusable for those users who are running interactive programs. All jobs that require continuous cpu time that are run without using the PBS Pro queuing system will be terminated.

All faculty and students at Tulane University are permitted access to the computational resources at the Center for Computational Sciences with the following queue structure in increasing order of permission (and responsibility):

queue name	execution queue	cpu time	memory	max # of cpus for user	max # of running jobs	priority	user run limit
Q1	Q1_short	< 72hrs	800 MB	1	30	35	2
Q2	Q2_short	< 72hrs	800 MB	1	30	40	2
	Q2_long	< 168hrs	800 MB	1	30	20	2
	Q_smp_l	< 168hrs	800 MB	2	30	30	1
Q3	Q3_short	< 72hrs	800 MB	1	30	60	2
	Q3_long	< 168hrs	800 MB	1	30	30	2
	Q_smp	< 168hrs	800 MB	4	30	40	1
Q4	Q4_short	< 72hrs	800 MB	1	30	70	2
	Q4_long	< 168hrs	800 MB	1	30	50	2
	Q_smp	< 168hrs	800 MB	4	30	40	1

For more information behind the queuing structure and how to get access to the various queuing levels please follow this link.

To use PBS Pro simply read over these examples and try them.