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problem in the CFX12.1 parallel computation

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Old   February 24, 2011, 08:48
Default problem in the CFX12.1 parallel computation
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I am using the LINUX CFX12.1 parallel computation to modeling an axial compressor flow. The total grid elements is about nine million. Eight computers were used with a HP MPI distributed parallel.

The problem is that the computation stopped at about 40th step, with no error pop out. I am sure the CPU and memory is sufficient for the computation, but why i got the interruption?

Another problem is that should I do anything when I manually stopped a MPI parallel computation. I find that, the computation become slow when it is started after a parallel computation stopped.

Thanks firstly,

BalanceChen
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Old   March 1, 2011, 08:20
Default Problem has been figured out in the CFX12.1 parallel computation, Thank you~
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I choose the partition type to "uniform" and then the problem dissappears~
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Old   July 7, 2011, 10:26
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Quote:
Originally Posted by BalanceChen View Post
I am using the LINUX CFX12.1 parallel computation to modeling an axial compressor flow. The total grid elements is about nine million. Eight computers were used with a HP MPI distributed parallel.

The problem is that the computation stopped at about 40th step, with no error pop out. I am sure the CPU and memory is sufficient for the computation, but why i got the interruption?

Another problem is that should I do anything when I manually stopped a MPI parallel computation. I find that, the computation become slow when it is started after a parallel computation stopped.

Thanks firstly,

BalanceChen
Hi BalanceChen,
I have a question to ask.

I'm using the same CFX and I want to use a supercomputer with 4nodes*4 ppn= 16
my problem is that when I use serial it solve about 12 iterations per hour.

when I use any parallel or Distributed parallel the speed is slowerrrr.. 2 iterations per hour.

do you know why?

regards.
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