TELEMAC-MASCARET Forum: Use TELEMAC system in an HPC environment (1/1)

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TOPIC: Use TELEMAC system in an HPC environment

Use TELEMAC system in an HPC environment 12 years 3 months ago #6274

bouanan.aissa OFFLINE Senior Boarder Posts: 65 Thank you received: 1	Hello, I would like to use our HPC cluster for TELEMAC simulations (Windows Server 2008 HPC). It works very well for CFD calculation but have no idea how to configure TELEMAC to make use of it. Since the system is a 128 processor cluster, can TELEMAC make use of all the process ? Aissa
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Use TELEMAC system in an HPC environment 12 years 3 months ago #6275

pham
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Hello Aissa,

Yes TELEMAC can. Nevertheless, computation (CPU) times may not be optimal if using all of them, depending on the number of elements per core (see scalability). Moreover, depending on the architecture of your cluster, if the nodes are not fully loaded, CPU times may sometimes be better (e.g. if your cluster is made of 16 nodes of 2 quad-core processors, by using 16 nodes of with only 6 out of 8 cores, you can get better CPU times).

Hope this helps,

Chi-Tuan

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Use TELEMAC system in an HPC environment 12 years 3 months ago #6276

bouanan.aissa OFFLINE Senior Boarder Posts: 65 Thank you received: 1	Hello again, Therefore what are the steps to let TELEMAC make use of the cluster. Knowing that I have access to a 128 cores cluster, should I use only 120 instead of 128? How can I know the optimum cpu time? Thank you, Aissa
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Use TELEMAC system in an HPC environment 12 years 3 months ago #6284

sebourban OFFLINE Administrator Principal Scientist Posts: 814 Thank you received: 219	Hello Aissa, try looking at this post: Runnin Telemac -3d with python script on cluster There are information about how to configure your systel.cfg file. Note that all depends on the "queing" system you use. You may have to adapt your HPC script as a reault. Hope this helps. Sébastien.
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Use TELEMAC system in an HPC environment 12 years 3 months ago #6285

pham
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Thank you received: 619

Hello Aissa,

To run TELEMAC with python environment on cluster, Sébastien has already answered.

"How can I know the optimum cpu time?" If you have no ideas, try powers of two with all nodes fully loaded (e.g. 2, 4, 8, 16, 32, 64 and 128 in your case, just be sure that nobody else runs simulation at the same time on the same cores, but that should be managed by your cluster root).

How many elements do you have in your geometry file? Depending on the cluster, around 5,000 elements per core is around the optimal value.

Hope this helps,

Chi-Tuan

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The following user(s) said Thank You: bouanan.aissa

Use TELEMAC system in an HPC environment 12 years 3 months ago #6300

bouanan.aissa OFFLINE Senior Boarder Posts: 65 Thank you received: 1	Thank you guys for your helping hand. I'll give it a try next week and will let you know if it is working Merci encore pour votre support, vous êtes les meilleurs :) Aissa,
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Use TELEMAC system in an HPC environment 12 years 3 months ago #6449

bouanan.aissa OFFLINE Senior Boarder Posts: 65 Thank you received: 1	Hello again, I tried hardly to use information from the link provided by Sebourban, but it was unsuccessful ;-(. Could some, please, provide me with a systel file defined to work with win 7 x64? Thank you, Aissa
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