running openFOAM on network

hawkeye321 · January 15, 2013, 15:53

Hi foamer
I am trying to run Openfoam on two machines, but I get this error:

ssh: Could not resolve hostname r-soll41: Name or service not known

The machine file is in text format and contains:
r-soll34
r-soll41
and I am running from r-soll34.

Do you have any idea why I get this error?
Do you have any step by step manual showing how to set SSH settings on the machines?

Linse · January 16, 2013, 04:12

No guarantee, Mahdi, I'm just poking at some minor points having only minor experience with ssh-connected machines. But how do you try to use the machinefile?

If I remember correctly, the basic run command should look something like:
mpirun -np 8 -hostfile machines rhoPimpleFoam -parallel
with 8 being the number of your cores and "machines" being the machinefile.
The rest should be clear, I think...

If it really is a SSH-specific problem unfortunately I can not help any further. But the error message to me simply looks like the name of the remote host was passed on like a command, not like an option to sum run-program...

sail · January 16, 2013, 09:55

you should edit you host file (ususally is in /etc/host but might depend on distro) and add a line with

r-soll41 iPAddressOfTheMachine

in addition to this, have you set up passwordless ssh access on the 41 machine?

what happens if you try to connect manually with ssh to the server?

January 15, 2013, 15:53	running openFOAM on network	#1
hawkeye321 Member ,... Join Date: Apr 2011 Posts: 92 Rep Power: 14	Hi foamer I am trying to run Openfoam on two machines, but I get this error: ssh: Could not resolve hostname r-soll41: Name or service not known The machine file is in text format and contains: r-soll34 r-soll41 and I am running from r-soll34. Do you have any idea why I get this error? Do you have any step by step manual showing how to set SSH settings on the machines?

January 16, 2013, 09:55		#3
sail Senior Member Vieri Abolaffio Join Date: Jul 2010 Location: Always on the move. Posts: 308 Rep Power: 16	you should edit you host file (ususally is in /etc/host but might depend on distro) and add a line with r-soll41 iPAddressOfTheMachine in addition to this, have you set up passwordless ssh access on the 41 machine? what happens if you try to connect manually with ssh to the server? __________________ http://www.leadingedge.it/ Naval architecture and CFD consultancy

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January 16, 2013, 04:12		#2
Linse Senior Member Bernhard Linseisen Join Date: May 2010 Location: Heilbronn Posts: 183 Blog Entries: 1 Rep Power: 15	No guarantee, Mahdi, I'm just poking at some minor points having only minor experience with ssh-connected machines. But how do you try to use the machinefile? If I remember correctly, the basic run command should look something like: mpirun -np 8 -hostfile machines rhoPimpleFoam -parallel with 8 being the number of your cores and "machines" being the machinefile. The rest should be clear, I think... If it really is a SSH-specific problem unfortunately I can not help any further. But the error message to me simply looks like the name of the remote host was passed on like a command, not like an option to sum run-program...