Thank you Sir the problem was with the paths of 'bin' and 'lib' folders so i used de mpirun --prefix command. I want to run a program 'pi' now using the cluster, so where do i place de file on de master and the compute nodes?
 
Also how do i come to know that the program is using resources of both the nodes?

On Sat, Apr 4, 2009 at 7:05 PM, Jeff Squyres <jsquyres@cisco.com> wrote:
It might be best to:

1. Setup a non-root user to run MPI applications
2. Setup SSH keys between the hosts for this non-root user so that you can "ssh <otherhost> uptime" and not be prompted for a password/passphrase

This should help.



On Apr 4, 2009, at 5:51 AM, Ankush Kaul wrote:

I followed the steps given here to setup up openMPI cluster : http://www.ps3cluster.umassd.edu/step3mpi.html

My cluster consists of two nodes, master(192.168.67.18) and salve(192.168.45.65), connected directly through a cross cable.

After setting up the cluster n configuring the master node, i mounted  /tmp folder of master node on the slave node(i had some problems with nfs at first but i worked my way out of it).

Then i copied the 'pi.c' program in the /tmp folder and successfully complied it, giving me a binary file 'pi'.

Now when i try to run the binary file using the following command

#mpirun –np 2 ./Pi

root@192.168.45.65's password:
<it asks for the password>

after entering the password it gives the following error:

bash: orted: command not found
[ccomp.cluster:18963] [0,0,0] ORTE_ERROR_LOG: Timeout in file base/pls_base_orted_cmds.c at line 275
[ccomp.cluster:18963] [0,0,0] ORTE_ERROR_LOG: Timeout in file pls_rsh_module.c at line 1166
[ccomp.cluster:18963] [0,0,0] ORTE_ERROR_LOG: Timeout in file errmgr_hnp.c at line 90
[ccomp.cluster:18963] ERROR: A daemon on node 192.168.45.65 failed to start as expected.
[ccomp.cluster:18963] ERROR: There may be more information available from
[ccomp.cluster:18963] ERROR: the remote shell (see above).
[ccomp.cluster:18963] ERROR: The daemon exited unexpectedly with status 127.
[ccomp.cluster:18963] [0,0,0] ORTE_ERROR_LOG: Timeout in file base/pls_base_orted_cmds.c at line 188
[ccomp.cluster:18963] [0,0,0] ORTE_ERROR_LOG: Timeout in file pls_rsh_module.c at line 1198
--------------------------------------------------------------------------
mpirun was unable to cleanly terminate the daemons for this job. Returned value Timeout instead of ORTE_SUCCESS.
--------------------------------------------------------------------------

I am totally lost now, as this is the first time i am working on a cluster project, and need some help

Thank you
Ankush

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Jeff Squyres
Cisco Systems


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