Hi,

I was able to compile & install MPICH on a master virtual machine for a user cosy11.

There are identical 2 VM running with IPs 198.125.163.212, 198.125.163.207

I picked IP=212 as my master node.

On this node I can run pi computation on two processes:

cosy11@mpi-be6bebee-55e3-4901-a5bb-637395ba46f6 mpich-3.1]$ mpiexec -n 2 ./examples/cpi
Process 1 of 2 is on mpi-be6bebee-55e3-4901-a5bb-637395ba46f6
Process 0 of 2 is on mpi-be6bebee-55e3-4901-a5bb-637395ba46f6
pi is approximately 3.1415926544231318, Error is 0.0000000008333387
wall clock time = 0.000310

The next step of instruction (h)

http://www.mpich.org/static/downloads/3.1/mpich-3.1-README.txt

tells me to define  machinefile , below is my definition:

$ cat machinefile 

198.125.163.207:2
198.125.163.212:2

Note, I verified I can ssh to both machines from IP=212, but I must type in the password

$ ssh cosy11@198.125.163.212

$ ssh cosy11@198.125.163.207

Now, I try to compute pi on both VMs and  mpiexec get stuck asking for the password (see the screen shot)

mpiexec -f machinefile -n 4 ./examples/cpi

I must somehow pass credentials for user=cosy11 to both VMs - how?

Have I missed this step of the instruction?

Do I need  to use ssh-key added to my ssh-add list  on IP=212  to make mpiexec to work with remote hosts?

Is there other solution you prefer?

Can you help me how to overcome that?

Thanks

Jan

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-- 
Antonio J. Peña
Postdoctoral Appointee
Mathematics and Computer Science Division
Argonne National Laboratory
9700 South Cass Avenue, Bldg. 240, Of. 3148
Argonne, IL 60439-4847
apenya@mcs.anl.gov
www.mcs.anl.gov/~apenya