[CIG-SHORT] Parallel computing problem

[Romain Jolivet]

Thanks for your help, 

I'm running PyLith 1.6.3, and I tried to run that with both binaries from the cig website and with the one we compiled on our machine.

Romain


Romain Jolivet
Postdoctoral Scholar
Geological and Planetary Sciences
California Institute of Technology, Pasadena, CA 
rjolivet at caltech.edu
+1 (626) 560 6356

On May 22, 2012, at 8:44 PM, Charles Williams wrote:

> What version of PyLith are you running?  I'm running the prerelease version of 1.7 and I also get a problem when I try running on more than 1 node in examples/3d/hex8; however, the problem seems to go away when I try a different linear solution option.  Try using the attached .cfg file and see if things improve.  For your particular problem, I get a different issue when running in parallel (HDF5 error).  I'm not sure what the problem might be, but we'll have a look.
> 
> Cheers,
> Charles
> 
> [see attached file: pc_fieldsplit_mult_separate.cfg]
> 
> On 23/05/2012, at 1:36 PM, Romain Jolivet wrote:
> 
>> Hi, 
>> 
>> I have a problem running pylith on multiple nodes. 
>> 
>> My model is based on an elastic medium with a fault in it. When I use the FaultCohesiveKin property and impose the displacement, everything is fine.
>> However, when I use the FaultCohesiveDyn property, with StaticFriction, it starts getting messy. My files are attached.
>> I run:
>> pylith step01.cfg
>> and the run is fine
>> If I run
>> pylith --nodes=10 step01.cfg
>> it crashes at the first time step. I tried with nodes=2 to nodes=12 (the number of cores on my machine) and I had the same result. The error message comes from petsc.
>> 
>> I went into the pylith examples to find a similar, but simpler, problem. In example/3d/hex8/, I tried to run step10.cfg:
>> with one node, it is fine:
>> pyltih step10.cfg
>> However, when you ask for several nodes (more than 2), it crashes:
>> pylith --nodes=3 step10.cfg
>> with 2 nodes, it seems to be fine, but you have a petsc error message at the end.
>> 
>> I someone has an idea on this....
>> Thank you
>> Romain
>> 
>> <TestRomain.tgz>
>> 
>> 
>> 
>> Romain Jolivet
>> Postdoctoral Scholar
>> Geological and Planetary Sciences
>> California Institute of Technology, Pasadena, CA 
>> rjolivet at caltech.edu
>> +1 (626) 560 6356
>> 
>> _______________________________________________
>> CIG-SHORT mailing list
>> CIG-SHORT at geodynamics.org
>> http://geodynamics.org/cgi-bin/mailman/listinfo/cig-short
> 
> Charles A. Williams
> Scientist
> GNS Science
> 1 Fairway Drive, Avalon
> PO Box 30368
> Lower Hutt  5040
> New Zealand
> ph (office): 0064-4570-4566
> fax (office): 0064-4570-4600
> C.Williams at gns.cri.nz
> 
> <pc_fieldsplit_mult_separate.cfg>

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