Dear Open MPI users, Please help me to find the solution for the problem using mpirun with a ROCK cluster, 3 nodes. I use the command: mpirun -np 12 --machinefile machinefile.txt --allow-run-as-root ./wrf.exe But mpirun was unable to access other nodes (as the below photo). But actually I checked the connection of three nodes by command "ping node's IP", they are well connected. [image: 2.png] My machinefile.txt includes IP of three nodes (frontend and 2 connected nodes), like this: 10.1.85.1 slots=4 10.1.85.254 slots=4 10.1.85.253 slots=4
My cluster is built by a ROCK cluster, with 3 nodes, CPUS 8 per each node. *My question is: How can I connect 3 nodes to run together?* Please advise Thanks Ha Chi -- *Ms. Nguyen Nhat Ha Chi* PhD student Environmental Engineering and Management Asian Institute of Technology (AIT) Thailand
