Running Batch Jobs on Roar Collab

To submit batch jobs, use the `sbatch` command to submit a job submit script to the scheduler. To highlight how this works, let’s use this basic script (called python.sh) as an example: 

#!/bin/bash 
module load python/3.6 
python hello_world.py 

 To submit this script as a batch job using the default parameters, the command would be: 

$ sbatch python.sh 

 Job submit scripts are batch scripts with added #SBATCH directives to outline the resources desired by the scheduler. These directives can be placed at the top of the submit script, as shown below: 

#!/bin/bash 
#SBATCH --nodes=1 
#SBATCH --ntasks=1 
#SBATCH --mem=1GB 
#SBATCH --time=1:00:00 
#SBATCH --partition=open 

module load python/3.6 
python hello_world.py 

Alternatively, directives can be specified inline when you submit using

sbatch

Here is an example of inline directives requesting a single core on a single node with 1 GB of RAM for 1 hour on the Open queue:

$ sbatch -N 1 -n 1 --mem=1GB -t 1:00:00 -p open python.sh 

Here are some common directives used: 

More #SBATCH directives can be found in the Slurm documentation.