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Fluent 6.3 on a Linux cluster

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Old   February 8, 2008, 10:29
Default Fluent 6.3 on a Linux cluster
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cfd_newbie
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Hi,

I'm working on a Linux cluster 32 bits, 5 nodes at 1.7 GHz and 2 GB of RAM on each node, the Fluent version is 6.3.

Well, I've done the same calculation on my Core Duo laptop 1.6 GHz and 2 GB of RAM, Linux on 32 bits - a simple 2D calculation, and ... the solution converged faster on my laptop.

This is something normal ? I mean a five nodes cluster should be much faster than my laptop.

Thanks in advance.

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Old   February 8, 2008, 10:50
Default Re: Fluent 6.3 on a Linux cluster
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Phil
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What is the cell count? Very low cell counts dont scale well over a cluster. You need >100k cells per cpu core.
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Old   February 8, 2008, 10:54
Default Re: Fluent 6.3 on a Linux cluster
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mAx
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not necessary you should use your cluster with 3d calculations or with a minimum of cells. try the same with a 3d model, you should see the difference

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Old   February 8, 2008, 11:01
Default Re: Fluent 6.3 on a Linux cluster
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cfd_newbie
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I use for this problem a very dense mesh 300000 cells, your suggestion is to use only 3 processors for the job ?

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Old   February 8, 2008, 12:09
Default Re: Fluent 6.3 on a Linux cluster
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Phil
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I dont bother with parallel under 300k cells PER CORE i.e. minimum 600k cells per dual core machine.
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