Hi Gilles and Jeff, @Gilles I will have a look at these files, thanks.
@Jeff this is the error message (screen dump attached) and of course the nodes names do not agree with the standard.
Patrick Le 16/06/2022 à 14:30, Jeff Squyres (jsquyres) a écrit :
What exactly is the error that is occurring? -- Jeff Squyres jsquy...@cisco.com ________________________________________ From: users<users-boun...@lists.open-mpi.org> on behalf of Patrick Begou via users<users@lists.open-mpi.org> Sent: Thursday, June 16, 2022 3:21 AM To: Open MPI Users Cc: Patrick Begou Subject: [OMPI users] OpenMPI and names of the nodes in a cluster Hi all, we are facing a serious problem with OpenMPI (4.0.2) that we have deployed on a cluster. We do not manage this large cluster and the names of the nodes do not agree with Internet standards for protocols: they contain a "_" (underscore) character. So OpenMPI complains about this and do not run. I've tried to use IP instead of host names in the host file without any success. Is there a known workaround for this as requesting the administrators to change the nodes names on this large cluster may be difficult. Thanks Patrick
