Thanks Jeff for the doc. However I'm not sure if I understand your following comment correctly. If I remove the MX BTL plugins, a.k.a., mca_btl_mx.la and mca_btl_mx.so, I'm now getting errors of these components not found.
[n0026.hbar:09467] mca: base: component_find: unable to open .../mca_btl_mx.la: file not found (ignored) [n0026.hbar:09467] mca: base: component_find: unable to open .../mca_btl_mx.so: file not found (ignored) And it still uses TCP BTL instead of MX MTL from what I can tell. Am I doing things wrong? Thanks, Yong On Fri, Jun 29, 2012 at 4:23 AM, Jeff Squyres <jsquy...@cisco.com> wrote: > If you want to use the MX MTL, it may be simplest to simply remove the MX BTL > plugin from your installation directory. That way, it *should* auto-select > the MX MTL when you have machines with MX, and when you're on machines that > do not have MX but do have OpenFabrics devices, it should auto-select the > openib BTL.