CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Running, Solving & CFD (http://www.cfd-online.com/Forums/openfoam-solving/)
-   -   Setup to to run in parallel (http://www.cfd-online.com/Forums/openfoam-solving/60645-setup-run-parallel.html)

Pei-Ying Hsieh (Hsieh) March 3, 2005 16:07

Hi, I have 3 computers run
 
Hi,

I have 3 computers running Fedora Core 3. I installed LAM on all 3 and all three computers have OpenFOAM installed with the same user name/password.

1. how do I make sure LAM is working properly?
2. For the same case, do I have to copy the same case on all 3 computers and then do decomposition? Or do I just have the case on one computer and then decompose? Is there any more details on setting runs in parallel?
3. this 3 computers have different cpu speeds (P4 2 GHz, AMD XP 2100+, and AMD 1 GHz), how should this be weighted? higher value means faster CPU?

Thanks!

Pei

Fabian Peng Kärrholm (Kärrholm) March 4, 2005 02:59

2. Look in the UserGuide.pdf
 
2. Look in the UserGuide.pdf under /OpenFOAM/OpenFOAM-1.0/doc/Guides-a4/ I find this guide pretty handy when trying on new things.

3. I use a metis decomposition for my cases, which usually turns out very well. It is there possible to select weights for every processor listed in system/machines . As for how to weight, I would suggest you run the same case on all three, measure the time for an iteration and then calculate weights using that time.

Hope it helps

/Fabian

Eugene de Villiers (Eugene) March 4, 2005 06:16

1. You should not install LAM
 
1. You should not install LAM as it is already part of the OpenFOAM distribution.


All times are GMT -4. The time now is 21:50.