Adam -
There are a couple of theoretical limits on how many requests you can have
outstanding (at some point, you will run the host out of memory). However,
those issues should be a problem when posting the MPI_Isend or MPI_Irecv, not
during MPI_Waitall. 2.1.0 is pretty old; the first step
I'm running OpenMPI 2.1.0 on RHEL 7 using TCP communication. For the
specific run that's crashing on me, I'm running with 17 ranks (on 17
different physical machines). I've got a stage in my application where
ranks need to transfer chunks of data where the size of each chunk is
trivial (on the
