As much as I hate to reply to myself, I'm going to in this case.
Digging deeper into the old OS image (I found a couple of nodes that I
forgot to image), it looks like libibverbs and librdmacm were, in fact
installed. That explains how the previous image was able to avoid the
"cannot open shared
I hope this isn't too basic of a question, but is there a document
somewhere that describes how the selection of which BTL components (eg.
openib, tcp) to use occurs when mpirun/mpiexec is launched? I know it
can be influenced by conf files, parameters, and env variables. But
lacking those, how d
