While mvapich from version 2.3 deprecated the Nemesis interface, is there any way now to configure it at once for Infiniband support with fallback to TCP when failed? Or do I have to have two compilations for different network setups in my grid?
I'll answer my question with the information from MVAPICH developers:
At this point, the default MVAPICH channel cannot use TCP as a fallback if IB fails. We will see if such a support can be enabled in the future.