You wish to launch several commands in a same time in a job.

• For running all commands in parallel without waiting the end of the precedent command, add a & at the end of the command.
• However, as soon as a job is launched, the job ends without having the time to run the commands.
• For solving this problem, add the wait command at the end of your script (of course, don’t add the & at the end of this command)
• Add #SBATCH –ntasks-per-node=N so that commands/tasks do not run on a same core of the node.
• Example of a script

#!/bin/sh
#SBATCH --job-name=job
#SBATCH –ntasks-per-node=N # A number between 1 and the number of cores of the node. N should be equals to the number of tasks.
...
 
./my_cmd1&
./my_cmd2&
./my_cmd3&
./my_cmd4&
...
./my_cmdN&
wait