3. Running Parallel Jobs

1. Create a Program

   We want to run a few jobs in parallel. We're going to create a simple program that takes a number as input and prints the square of that number. We'll pass the number of the job as an argument to the program. There is an example saved in the directory called myapplication.sh.

   #!/bin/bash # Square the input integer input=$1 result=$((input * input)) # Print the result echo "The square of $input is $result"

2. Create a Job Script

   Create a file named array_job.sh with the following content. The $SLURM_ARRAY_TASK_ID variable will be set to the index of the job in the array. We'll be creating an array of 5 jobs.

   #!/bin/bash #SBATCH --account=def-sponsor00 #SBATCH --time=0-0:5 #SBATCH --array=1-5 ./myapplication.sh $SLURM_ARRAY_TASK_ID

3. Submit the Job

   Use the sbatch command to submit your job script:

   sbatch array_job.sh

4. Monitor the Job

5. Check the Output

6. Cancel Jobs