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July 29, 2009, 00:41 |
system / solver capacity
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#1 |
Member
jaikrishna
Join Date: Mar 2009
Location: chennai
Posts: 56
Rep Power: 17 |
how do i calculate maximum or optimum amount of elements can be solve in a machine(based on number of node, ram..)?
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July 29, 2009, 06:51 |
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#2 |
Senior Member
Join Date: Apr 2009
Posts: 531
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While there are some rules of thumb, the memory required will depend on the particular case and the models used. If you run a case with x number of nodes, then just look in the out file before the first iteration to see how much memory was used. Memory will scale linearly with the number of nodes - so 2x nodes requires twice the memory etc.
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July 29, 2009, 13:46 |
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#3 |
Member
jaikrishna
Join Date: Mar 2009
Location: chennai
Posts: 56
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if my problem having x number of elements and I'm solving by serial type (ie: 1 processor) so it utilize some y amount of memory.
this same x number of elements solving by 2 processors means it utilize 2*y memory. Is this correct? mean time I'll check it I've 4 processors and 4 node license and 8GB ram. how many number of element i could run optimally? how to calculate to know this? if my problem size is 10 million elements and how do i know minimum configuration require for this? |
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July 29, 2009, 19:11 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
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Hi,
The size analysis you require should be determined by a sensitivity analysis. After you have determined the mesh size and timestep size you require you then look at what computer is required to run it. Why don't you run a 1M and a 2M node simulation and look at the memory use? Then you can extrapolate it out to the size you require. Glenn Horrocks |
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July 30, 2009, 13:04 |
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#5 |
Member
jaikrishna
Join Date: Mar 2009
Location: chennai
Posts: 56
Rep Power: 17 |
please could you explain in details with one example
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July 31, 2009, 02:51 |
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#6 |
New Member
Join Date: May 2009
Posts: 17
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Check "CPU and Memory Requirements" section under ANSYS CFX-Solver Manager User's Guide.
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