Job Types

The clusters are designed for different work loads, and each cluster has several types of jobs. This page gives an overview of the available job types on each cluster, and their main characteristics. See the sub pages of each cluster for a more detailed description of the job types and their purposes.

You should always choose the job type that fulfils the resource requirements of your job best without being excessive as this ensures the highest possible priority and therefore the shortest queuing time. If for example your job on Saga needs 20GB memory and 5 CPUs for 5 days, you should choose a normal instead of a bigmem job. If it instead needs 200GB memory you should use bigmem.

Betzy

Name

Description

Job limits

Max walltime

Priority

normal

default job type

8–256 nodes

4 days

normal

preproc

pre-/postprocessing jobs

1–8 units

1 day

normal

devel

development jobs (compiling, testing)

1–4 nodes

30 mins

high

For jobs that don’t request much memory, the “units” of preproc jobs are simply the number of cpus the job requests. For other jobs, see job_accounting for how the units are calculated.

Betzy Job Types.

Fram

Name

Description

Job limits

Max walltime

Priority

normal

default job type

1–32 nodes

7 days

normal

preproc

pre-/postprocessing jobs

1 node

1 day

normal

bigmem

jobs needing more memory

14 days

normal

devel

development jobs (compiling, testing)

1–8 nodes

30 mins

high

short

short jobs

1–10 nodes

2 hours

high

optimist

jobs w/checkpointing, or very short jobs

1–32 nodes

see details

low

Fram Job Types.

Saga

Name

Description

Job limits

Max walltime

Priority

normal

default job type

1–256 units

7 days

normal

bigmem

jobs needing more memory

1–256 units

14 days

normal

accel

jobs needing GPUs

1–256 units

14 days

normal

devel

development jobs (compiling, testing)2

1–128 units

2 hours

high

optimist

jobs w/checkpointing, or very short jobs

1–256 units

see details

low

For jobs that don’t request GPUs or much memory, the “units” on Saga are simply the number of cpus the job requests. For other jobs, see job_accounting for how the units are calculated.

Saga Job Types.


2

On Saga it is possible to combine devel with accel or bigmem, see details.