Dear Patrick and all, Finally I solved the problem. I need to mount -t nfs the home directory of host to the node/home And then I can run in the cluster
Thank you for your time. Best regards Ha Chi On Thu, 4 Jun 2020 at 17:09, Patrick Bégou < patrick.be...@legi.grenoble-inp.fr> wrote: > Ha Chi, > > first running MPI applications as root in not a good idea. You must create > users in your rocks cluster without admin rights for all that is not system > management. > > Let me know a little more about how you launch this: > 1) Do you run "mpirun" from the rocks frontend or from a node ? > 2) Ok from ssh from the frontend to the node but BETWEEN 2 nodes ? > > Patrick > > Le 04/06/2020 à 10:02, Hà Chi Nguyễn Nhật a écrit : > > Dear Patrick, > Thanks so much for your reply, > Yes, we use ssh to log on the node. From the frontend, we can ssh to the > nodes without password. > the mpirun --version in all 3 nodes are identical, openmpi 2.1.1, and same > place when testing with "whereis mpirun" > So is there any problem with mpirun causing it to not launch to other > nodes? > > Regards > HaChi > > On Thu, 4 Jun 2020 at 14:35, Patrick Bégou via users < > users@lists.open-mpi.org> wrote: > >> Hi Ha Chi >> >> do you use a batch scheduler with Rocks Cluster or do you log on the node >> with ssh ? >> If ssh, can you check that you can ssh from one node to the other >> without password ? >> Ping just says the network is alive, not that you can connect. >> >> Patrick >> >> Le 04/06/2020 à 09:06, Hà Chi Nguyễn Nhật via users a écrit : >> >> 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 >> >> >> > > -- > *Ms. Nguyen Nhat Ha Chi* > PhD student > Environmental Engineering and Management > Asian Institute of Technology (AIT) > Thailand > > > -- *Ms. Nguyen Nhat Ha Chi* PhD student Environmental Engineering and Management Asian Institute of Technology (AIT) Thailand
