Slurm vs Grid Engine
The new FMRIB cluster, Ood, uses the SLURM cluster software and the fsl_sub module now uses the SLURM cluster.
SLURM is significantly different from Grid Engine, in particular, there are no RAM limits for jobs. We STRONGLY recommend that you specify RAM (with fsl_sub's -R option) to ensure efficient use of the cluster, without it, all jobs will default to requesting 15GB of RAM. This also means that the -S/--noramsplit option is meaningless.
Queue mapping
| Jalapeno Queue | Ood Queue |
| veryshort.q | short |
| short.q | short |
| long.q | long |
| verylong.q | long |
| bigmem.q | long (+ memory specifier) |
| interactive.q | Reserved for remote desktop system Can launch interactive tasks on any of the normal queues |
| gpu.q-----------------> | gpu_short |
| |_________________> | gpu_long |
Multi-Threaded Tasks
fsl_sub's native options remain the same, but of note, SLURM does not support parallel environments, so when requesting multi-thread jobs slots you can use -s <number>. If you provide a parallel environment name this will be discarded, so existing scripts should continue to work as is.
Interactive GUI apps
Interactive tasks should be run via the new Open OnDemand virtual desktop facility.