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-   -   Partitioner in CFX 5.7 (http://www.cfd-online.com/Forums/cfx/20325-partitioner-cfx-5-7-a.html)

deLuther April 28, 2004 10:07

Partitioner in CFX 5.7
 
Hi All! Currently I experimenting with CFX 5.7(not beta). It looks like partitioner requirements in CFX 5.7 is higher than in v5.6 (in my case I`m using User Specified Direction). For same definition file partitioning requirements seems to be 1.5 times higher than in 5.6. And limiting 2GB memory size arise (on Linux). So I cannot run this problem in 5.7. Very sad

Glenn Horrocks April 28, 2004 18:28

Re: Partitioner in CFX 5.7
 
Hi deLuther,

Have you tried the other partitioning options? Any comments on them? Have you discussed this with your CFX rep?

Regards, Glenn

deLuther April 29, 2004 00:29

Re: Partitioner in CFX 5.7
 
Hi Glenn, For this particular problem I did not tried other partitioner options because computational domain is stretched in one dimension like, say, beam in FE. Previous experience with similar problem (domain has much less length) show that other partitioner options less eficient for computation? but I do not remember what hapens with memory requirement. For better representation here is excerpts from out-files: 5.6: +--------------------------------------------------------------------+ | Memory Allocated for Run (Actual usage may be less) | +--------------------------------------------------------------------+

Data Type Kwords Words/Node Words/Elem Kbytes Bytes/Node

Real 230352.7 57.08 79.68 899815.3 228.33 Integer 136651.8 33.86 47.27 533795.9 135.45 Character 1642.8 0.41 0.57 1604.3 0.41 Logical 40.0 0.01 0.01 156.3 0.04 Double 1200.5 0.30 0.42 9378.9 2.38

5.7: +--------------------------------------------------------------------+ | Memory Allocated for Run (Actual usage may be less) | +--------------------------------------------------------------------+

Data Type Kwords Words/Node Words/Elem Kbytes Bytes/Node

Real 321151.3 79.58 111.09 1254497.3 318.33 Integer 172744.2 42.81 59.76 674782.0 171.22 Character 1732.4 0.43 0.60 1691.8 0.43 Logical 40.0 0.01 0.01 156.3 0.04 Double 1200.5 0.30 0.42 9378.9 2.38

I contacted our local CFX representative but they only sugested to try RCB option... which can lead to slower computational time.

Regards, deLuther

deLuther May 4, 2004 15:40

Re: Partitioner in CFX 5.7
 
Further investigation (on other problems) shows that partitioner requirements same as in previous version (5.6)... But for that case it`s not true.


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