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March 19, 2008, 05:39 |
CFX Solver Memory Error
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#1 |
Guest
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Hi
I have a large mesh file that I am trying to solve using CFX v11. If I try and run it I get the requested memory allocation error, CFX is asking for about 6Gb of memory, The system has 16Gb (1.25Gb Hardware the rest virtual). The run fails due to 32bit Windows only being able to allocate a maximum of 2Gb RAM per process. I would like to know how I could get around this problem? I tried running in parallel on one machine with 8 and 6 partitions, although I dont really know what this means and if I have set it up right. When I do this I get the following error: +---------------------------------------------------+ | Job Information | +---------------------------------------------------+ Run mode: partitioning run Host computer: LAPTOP Job started: Tue Mar 18 19:31:04 2008 +--------------------------------------------------+ | Memory Allocated for Run (Actual usage may be | less) | +--------------------------------------------------+ Data Type Kwords Words/Node Words/Elem Kbytes Bytes/Node Real 20333.5 6.89 1.25 79427.7 27.55 Integer 260089.3 88.11 15.94 1015973.9 352.43 Character 2404.7 0.81 0.15 2348.3 0.81 Logical 58.5 0.02 0.00 228.5 0.08 Double 540.5 0.18 0.03 4222.3 1.46 +---------------------------------------------------+ | Mesh Statistics | +---------------------------------------------------+ Domain Name : Domain 1 Total Number of Nodes = 2951951 Total Number of Elements = 16316348 Total Number of Tetrahedrons = 16316348 Total Number of Faces = 626924 Domain Interface Name : DentBack Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : DentBase Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : DentFront Non-overlap area fraction on side 1 = 3.50E-07 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : DentIB Non-overlap area fraction on side 1 = 7.71E-05 Non-overlap area fraction on side 2 = 7.11E-09 Domain Interface Name : DentOB Non-overlap area fraction on side 1 = 5.43E-05 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : DentTop Non-overlap area fraction on side 1 = 1.12E-07 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : SlatTEBack Non-overlap area fraction on side 1 = 8.67E-09 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : SlatTEBackOB Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : SlatTEBase Non-overlap area fraction on side 1 = 2.12E-08 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : SlatTEBaseOB Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : SlatTEFront Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : SlatTEFrontOB Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : SlatTETop Non-overlap area fraction on side 1 = 1.96E-08 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : SlatTETopOB Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : WingTEBack Non-overlap area fraction on side 1 = 3.44E-08 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : WingTEBackOB Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : WingTEBase Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 4.56E-09 Domain Interface Name : WingTEBaseOB Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : WingTEFront Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : WingTEFrontOB Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : WingTETop Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 Domain Interface Name : WingTETopOB Non-overlap area fraction on side 1 = 0.00E+00 Non-overlap area fraction on side 2 = 0.00E+00 +------------------------------------------------------+ | Partitioning Information | +------------------------------------------------------+ Partitioning of domain: Domain 1 - Partitioning tool: MeTiS multilevel k-way algorithm - Number of partitions: 6 - Number of graph-nodes: 2951951 - Number of graph-edges: 39163518 +------------------------------------------------------+ | An error has occurred in cfx5solve: | |The ANSYS CFX partitioner exited with return code 3. | +------------------------------------------------------+ This run of the ANSYS CFX Solver has finished. Could this return code 3 mean I have setup the partioner incorrectly? If so could someone advise on the correct way to do it? Cheers Mike |
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March 19, 2008, 07:22 |
Re: CFX Solver Memory Error
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#2 |
Guest
Posts: n/a
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I think a 32 bit processor can only address 4 gb of ram. That's probably the bottle neck.
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