[CIG-SHORT] Parallel computing problem

[Charles Williams]

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



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
> 
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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

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