Page History

...

• A job wrapper script that is suitable for the locally available batch scheduler needs to be used to call the oifs-run script.
• We include the an example job wrapper script run.ecmwf-hpc2020.jobin $OIFS_HOME/bin, which is suitable for the ECMWF hpc2020 Atos HPC. It This uses the SLURM batch job scheduler.
  This script
  • In section 3, this script is copied to the experiment directory because it needs to be located
  inside your experiment directory.It should be edited as required; the default settings request 8 nodes on
  • here, to run an experiment.
  • run.ecmwf-hpc2020.job needs to be edited with the following essential and optional changess
    • Intially run.ecmwf-hpc2020.jobsets the PLATFORM_CFG variable as follows
      

  Code Block
  language bash theme Midnight
  # set OpenIFS platform environment: PLATFORM_CFG="/path/to/your/config/oifs-config.edit_me.sh"

  • • It is important to change "/path/to/your/config/oifs-config.edit_me.sh" to the actual path for the oifs-config.edit_me.sh, e.g., "$HOME/openifs/openifs_48R1.0/bin/oifs-config.edit_me.sh"
    • The default resources requested in run.ecmwf-hpc2020.job are  8 nodes on ECMWF hpc2020, with a total of 256 MPI tasks and
  4 OpenMP threads.
  • You will also need to set the appropriate path for your platform configuration script.

  ...

  • • 4 OpenMP threads. This can be changed as required.
    • For information, the LAUNCH command for batch job submission is set to "srun" without any further options

  ...

  • • , because all required parallel environment settings are provided through the SLURM script headers.

  Once you have made the appropriate changes to run.ecmwf-hpc2020.job, you can submit it and, hence, run the experiment with the following commands

  Code Block
  language bash theme Midnight
  # run as batch job: cd $PERM/i4xc/2016092500 sbatch ./run.ecmwf-hpc2020.job

  ...