Migration of some environment variables from openmpi 4 to openmpi 5

[francesco-ballarin]

Background information

What version of Open MPI are you using? (e.g., v4.1.6, v5.0.1, git branch name and hash, etc.)

5.0.5

Describe how Open MPI was installed (e.g., from a source/distribution tarball, from a git clone, from an operating system distribution package, etc.)

From Debian's package https://tracker.debian.org/pkg/openmpi

Please describe the system on which you are running

Not relevant

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Details of the problem

Hi,
I am updating several scripts related to debian packaging to openmpi 5.

I have changed OMPI_MCA_rmaps_base_oversubscribe to PRTE_MCA_rmaps_default_mapping_policy already, as discussed in https://docs.open-mpi.org/en/v5.0.x/mca.html

However, the scripts also use the following environment variables

• OMPI_MCA_btl_base_warn_component_unused
• OMPI_MCA_plm_rsh_agent
• OMPI_MCA_orte_rsh_agent

but I can't find them on that webpage.

Can you tell me what is the corresponding name in openmpi 5?
Is it as easy as replacing OMPI with PRTE? I'd rather ask and be extra sure before doing a massive search and replace in a lot of files ;)

Thanks,
Francesco

[rhc54]

OMPI_MCA_btl_base_warn_component_unused

Unchanged

OMPI_MCA_plm_rsh_agent

Should still be recognized (auto updated to the new form), but you can also change it to PRTE_MCA_plm_ssh_agent

OMPI_MCA_orte_rsh_agent

This has disappeared, I'm afraid

[francesco-ballarin]

Thanks very much for the quick reply, I'll replace the environment variables as suggested.