DRBL cluster with Open MPI 1.8.4

Question

When virtual/diskless node is used on DRBL cluster using Open MPI version 1.8.4, the error occurs:

Error: unknown option "--hnp-topo-sig" 

I guess something with the topology signature and looks new. Any suggestions? Typical command:

mpirun --machinefile machines -np 4 mpi_hello 

machinefile: node1 slots = 4

Thank you in advance

Answer 1

This suggests that you are running different mpi versions on the nodes. You can confirm if this is the case by ssh'ing into each node and running 'mpirun --version'