> On Jun 21, 2019, at 5:02 PM, Ralph Castain <r...@open-mpi.org> wrote:
> Too many emails to track :-(
> Should just be “--map-by core --rank-by core” - nothing fancy required. 
> Sounds like you are getting --map-by node, or at least --rank-by node, which 
> means somebody has set an MCA param either in the system config file or the 
> environment.

Yeay, that worked.  Apparently I didn’t try every combination.  I feel like the 
documentation could be better, since I clearly wasn’t able to figure this out, 
but I’m not sure what particular wording to suggest.  Let me think about it.

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