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starting cfx solver 19.2 on hpc

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Old   April 29, 2019, 08:11
Default starting cfx solver 19.2 on hpc
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Svetlana Tkachenko
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When i start cfx5solve 19.2 on a cluster, it partitions the mesh and things, comes to '+--------------+ Solver +--------------+' and then stops there for many hours doing nothing. I am not at all sure how to troubleshoot it. Can it be a problem with the licence?
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Old   April 29, 2019, 08:50
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Stops for hours? Do you mean that it is doing something but that you don't know what it is doing, and then after several hours continues normally? E.g. have you included radiation? I have seen cases where it took hours for CFX to do the raytracing, but then continued normally.......

Or is it really doing nothing and is waiting for you to kill the job? Does CFX leave a text file with an error in the directory that is named after the output file?
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Old   April 29, 2019, 09:43
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Erik
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This could be the result of many things. I do not think it is the licence though, that would give you an error. Usually something is not right with the configuration of distributed CFX.

You should run small test model distributed until you get everything set up correctly.

Uninstall old versions or set the environmental variables correctly. Ensure "hosts" file is correct. Allow program and processes through firewall including MPI processes. perhaps start on only 2 machines distributed, as there may be a problem with only 1 of the nodes. This could be difficult to troubleshoot.
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Old   April 29, 2019, 16:56
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Svetlana Tkachenko
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No radiation. It does not continue normally. Iteration number 1 does not begin.


I'll test with smaller distributed runs and write back. Thanks!
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Old   May 8, 2019, 09:22
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It is possibly a problem with IntelMPI. You might need to install the "old" version, which is found in the installation directory.
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Old   May 8, 2019, 21:02
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Svetlana Tkachenko
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You're right, I was loading a conflicting version of openmpi in my bashrc because I needed this for another script. Now I can see how this was a confusing and poor place to put that line in. I removed it and everything started running smoothly.
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