Slurm Usage¶

Slurm is used to submit jobs on the different partitions from the Monolithe frontend. The available partitions are listed in the description page (see the "Slurm Partition" column in the summary table).

Frontend Connection¶

It is recommended to add some lines to your ~/.ssh/config file as explained in the SSH access section. Then, to connect to the frontend from your computer you only have to do:

ssh front.mono.lip6

Basic Slurm Commands¶

Here are some useful command to start using Slurm:

sinfo -l lists the available partitions (= nodes in our case)

$ sinfo -l
Mon Mar 18 10:57:44 2024
PARTITION AVAIL  TIMELIMIT   JOB_SIZE ROOT OVERSUBS     GROUPS  NODES       STATE NODELIST
xu4          up   infinite 1-infinite   no       NO        all      1        idle vroum
tx2          up   infinite 1-infinite   no       NO        all      1        idle tegrax2c
xagx         up   infinite 1-infinite   no       NO        all      1        idle tegraagx
brub         up   infinite 1-infinite   no       NO        all      1        idle brubeck
xnano        up   infinite 1-infinite   no       NO        all      1        idle jetson-nano1
rpi4         up   infinite 1-infinite   no       NO        all      1        idle selfix
xnx          up   infinite 1-infinite   no       NO        all      1        idle tegranx-1
m1u          up   infinite 1-infinite   no       NO        all      1        idle m1ultra
onx          up   infinite 1-infinite   no       NO        all      1        idle orinnx
oagx         up   infinite 1-infinite   no       NO        all      1       mixed orinagx
onano        up   infinite 1-infinite   no       NO        all      1        idle orinnano
opi5         up   infinite 1-infinite   no       NO        all      1        idle orangepi5

srun -p [partition] command runs a command on a partition
```
$ srun -p m1u hostname
m1u
```
Submission of a job that executes the hostname command on the m1u partition.
srun -p [partition] --pty bash -i runs a interactive session on a partition
```
srun -p opi5 --cpus-per-task=8 --pty bash -i
```
Interactive job on the Orange Pi 5, all the 8 cores are used in this session (by default, if --cpus-per-task is not specified, only one core is allocated).

Note

An easier way to connect interactively to the nodes is to use a custom ~/.ssh/config file as detailed in the SSH Access page.
sbatch [script] runs a Slurm script on the cluster

squeue -l allows you to view current submitted jobs on the cluster

$ squeue -l
Mon Mar 18 10:58:20 2024
             JOBID PARTITION     NAME     USER    STATE       TIME TIME_LIMI  NODES NODELIST(REASON)
              1702      oagx     bash galveze-  RUNNING      47:10 UNLIMITED      1 orinagx

For instance, here one job from the galveze user is running on the oagx partition.

scancel [jobid] cancels a job
scancel -u [user] cancels all the jobs for a given user