Slurm is the batch system available. Any script can be submitted as a job with no changes, but you might want to see Writing SLURM jobs to customise it.
To submit a script as a serial job with default options enter the command:
sbatch yourscript.sh
You may query the queues to see the jobs currently running or pending with:
squeue
And cancel a job with
scancel <jobid>
Currently the "scancel" command shall be executed on the login node of the same cluster where the job is running.
See the Slurm documentation for more details on the different commands available to submit, query or cancel jobs.
QoS available
These are the different QoS (or queues) available for standard users on the four complexes:
| QoS name | Type | Suitable for... | Shared nodes | Maximum jobs per user | Default / Max Wall Clock Limit | Default / Max CPUs | Default / Max Memory |
|---|---|---|---|---|---|---|---|
| nf | fractional | serial and small parallel jobs. It is the default | Yes | - | average runtime + standard deviation / 2 days | 1 / 64 | 8 GB / 128 GB |
| ni | interactive | serial and small parallel interactive jobs | Yes | 1 | 12 hours / 7 days | 1 / 32 | 8 GB / 32 GB |
| np | parallel | parallel jobs requiring more than half a node | No | - | average runtime + standard deviation / 2 days | - | 240GB / 240 GB per node (all usable memory in a node) |
ECS
For those using ECS, these are the different QoS (or queues) available for standard users of this service:
| QoS name | Type | Suitable for... | Shared nodes | Maximum jobs per user | Default / Max Wall Clock Limit | Default / Max CPUs | Default / Max Memory |
|---|---|---|---|---|---|---|---|
| ef | fractional | serial and small parallel jobs - ECGATE service | Yes | - | average job runtime + standard deviation / 2 days | 1 / 8 | 8 GB / 16 GB |
| ei | interactive | serial and small parallel interactive jobs - ECGATE service | Yes | 1 | 12 hours / 7 days | 1 / 4 | 8 GB / 8 GB |
| el | long | serial and small parallel interactive jobs - ECGATE service | Yes | - | average job runtime + standard deviation / 7 days | 1 / 8 | 8 GB / 16 GB |
| et | Time-critical Option 1 | serial and small parallel Time-Critical jobs. Only usable through ECACCESS Time Critical Option-1 | Yes | - | average job runtime + standard deviation / 12 hours | 1 / 8 | 8 GB / 16 GB |
Time limit management
See HPC2020: Job Runtime Management for more information on how the default Wall Clock Time limit is calculated.
Limits are not set in stone
Different limits on the different QoSs may be introduced or changed as the system evolves.
Checking QoS setup
If you want to get all the details of a particular QoS on the system, you may run, for example:
sacctmgr list qos names=nf
Submitting jobs remotely
If you are submitting jobs from a different platform via ssh, please use the *-batch dedicated nodes instead of the *-login equivalents:
- For generic remote job submission on HPCF: hpc-batch or hpc2020-batch
- For remote job submission on a specific HPCF complex: <complex_name>-batch
- For remote job submission to the ECS virtual complex: ecs-batch
For example, to submit a job from a remote platform onto the Atos HCPF:
ssh hpc-batch "sbatch myjob.sh"