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Info

Worked Example:

We explain the model installation and the process of running of a forecast experiment on the ECMWF Atos Sequana XH2000 HPC facility (hpc2020). 

  • All data files and configuration scripts that are required for the worked example experiment described in this guide can be found on the ECMWF file system here:  /perm/openifs/oifs_data/48r1/example
  • The model will be installed into $HOME/openifs-48r1.1/
  • The example forecast experiment will be set up in directory $PERM/ab2a/

It is important to note that the installation process on hpc2020 will not directly translate to alternative systems. To address this we present details about a docker install in the last section of this guide.

Extract the OpenIFS package

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source /path/to/file/location/oifs-config.edit_me.sh
# using our installatinoinstallation example:
# source $HOME/openifs-48r1.1/oifs-config.edit_me.sh

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Info

Previous versions of the OpenIFS model also used a platform configuration file. Since OpenIFS 48r1 the number of variables set inside this file has been reduced to a bare minimum. At present, only the variables OIFS_HOME , OIFS_CYCLE , and OIFS_DATA_DIR  need to be set in this file. 

 Build OpenIFS (on ATOS hpc2020)

In the next step the model binary executable (and other helper programs) will be built.

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[INFO]: Good news - ctest has passed
        openifs is ready for experiment and SCM testing
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END ifstest on OpenIFS build

 Set up a forecast experiment (on ATOS hpc2020)

An example forecast experiment has been prepared for OpenIFS 48r1. The experiment ID is  ab2a. 

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