Simple Job

Every SLURM job consists of a job submission file. A job submission file contains a list of commands that run your program and a set of resource requests, such as nodes, walltime, and queue/account requests.

The resource requests can appear in the job submission file, or they can be specified at submit time.

This simple example submits the job submission file hello.sub to the standby queue on Gilbreth and requests a single node.

Example Job Submission File

Create a file named hello.sub:

#!/bin/bash
# FILENAME: hello.sub

# Show this ran on a compute node by running the hostname command.
hostname

echo "Hello World"

On Gilbreth, specifying the number of GPUs requested per node is required.

Submit the Job

Submit the job with sbatch:

sbatch -A standby --nodes=1 --ntasks=1 --cpus-per-task=1 --gpus-per-node=1 --time=00:01:00 hello.sub

Example output:

Submitted batch job 3521

For a real job, you would replace:

echo "Hello World"

with a command, or sequence of commands, that runs your program.

Check the Output File

After your job finishes running, the ls command will show a new .out file in your directory:

ls -l

Example output:

hello.sub
slurm-3521.out

The file slurm-3521.out contains the output and errors your program would have written to the screen if you had typed its commands at a command prompt.

View the output file with:

cat slurm-3521.out

Example output:

gilbreth-a001.rcac.purdue.edu
Hello World

You should see the hostname of the compute node your job was executed on, followed by the Hello World statement.

Back to the Example Jobs section