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Setup to to run in parallel

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Old   March 3, 2005, 16:07
Default Hi, I have 3 computers run
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Pei-Ying Hsieh (Hsieh)
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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
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Old   March 4, 2005, 02:59
Default 2. Look in the UserGuide.pdf
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Fabian Peng Kärrholm (Kärrholm)
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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
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Old   March 4, 2005, 06:16
Default 1. You should not install LAM
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Eugene de Villiers (Eugene)
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1. You should not install LAM as it is already part of the OpenFOAM distribution.
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