Posts tagged cron

Slurm-managed cronjobs

To execute recurring batch jobs at specified dates, times, or intervals, you can use the Slurm scrontab tool. It provides a reliable alternative to the traditionally used cron utility to automate periodic tasks on Levante.

To define the recurring jobs, Slurm uses a configuration file, so-called crontab, which is handled using the scrontab command. The scrontab command with the -e option invokes an editing session, so you can create or modify a crontab:

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Can I run cron jobs on HPC login nodes?

Update 2024-10-01: This procedure has been superseded by the Slurm scrontab feature, now available on Levante.

For system administration reasons users are not allowed to shedule and execute periodic jobs on DKRZ HPC systems using the cron utility. Our recommendation is to use the functionality provided by the workload manager Slurm for this purpose. With the option --begin of the sbatch command you can postpone the execution of your jobs until the specified time. For example, to run a job every day after 12pm you can use the following job script re-submitting itself at the beginning of the execution:

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