[CIG-SHORT] Update in SCEC CVM-H model and corresponding issues

[Brad Aagaard]

Nina-

There are several issues related to updating PyLith to be able to use 
the latest SCEC CVM-H version. Releases since 5.3 added more data files 
and greatly increased the size of the data files to provide a higher 
resolution, which makes using these versions very memory intensive. As a 
result, using them with PyLith one would often run out of memory. The 
necessary solution is to load only a subset of the model into memory at 
a time. The best solution is to convert the data files to a more 
efficient storage system which we have used in other seismic velocity 
models. This is nontrivial but SCEC has been working on some general 
tools, so we hope to provide access to the latest SCEC CVM-H model in 
the near future. In the meantime, as Charles mentioned, please use 
version 5.2 or 5.3.

Brad



On 7/26/11 2:24 PM, Charles Williams wrote:
> Dear Nina,
>
> Unfortunately, I don't think PyLith has been updated to work with the
> most recent version of CVM-H. I have version vx53 and that works OK. I
> think you may have to contact someone like Andreas Plesch to see if you
> can get an older version. If you have trouble getting it, let me know
> and I will create a tarball for you and put it where you can get it.
> Updating PyLith to use the new version actually requires an update to
> the spatialdata package on which PyLith depends. If there are
> significant improvements in the new CVM-H and people wish to update, we
> will see about upgrading that package.
>
> Cheers,
> Charles
>
> On 27/07/2011, at 5:57 AM, Nina Lin wrote:
>
>> Dear Sir/Madam,
>>
>> I've just downloaded the most recent SCEC CVM-H model from
>> structure.harvard.edu/cvm-h <http://structure.harvard.edu/cvm-h>. The
>> latest version is vx62. However, when I
>> execute the twotet4-geoproj/dislocation.cfg file, it's complaining about
>> not being able to find LA_LR.vo from the vx62/bin directory. The .vo
>> files in this directory are:
>>
>> CVM_CM.vo
>> CVM_LR.vo
>> CVM_HR.vo
>> interfaces.vo
>>
>> Same problem with vx63. Here is the complete error message:
>>
>> ##############################################
>> Traceback (most recent call last):
>> File
>> "/home/ninalin/app/pylith/pylith-1.6.1-linux-x86_64/lib/python2.6/site-packages/pylith/apps/PetscApplication.py",
>>
>> line 75, in onComputeNodes
>> self.main(*args, **kwds)
>> File
>> "/home/ninalin/app/pylith/pylith-1.6.1-linux-x86_64/lib/python2.6/site-packages/pylith/apps/PyLithApp.py",
>>
>> line 106, in main
>> self.problem.initialize()
>> File
>> "/home/ninalin/app/pylith/pylith-1.6.1-linux-x86_64/lib/python2.6/site-packages/pylith/problems/TimeDependent.py",
>>
>> line 109, in initialize
>> self.formulation.initialize(self.dimension, self.normalizer)
>> File
>> "/home/ninalin/app/pylith/pylith-1.6.1-linux-x86_64/lib/python2.6/site-packages/pylith/problems/Implicit.py",
>>
>> line 119, in initialize
>> self._initialize(dimension, normalizer)
>> File
>> "/home/ninalin/app/pylith/pylith-1.6.1-linux-x86_64/lib/python2.6/site-packages/pylith/problems/Formulation.py",
>>
>> line 446, in _initialize
>> integrator.initialize(totalTime, numTimeSteps, normalizer)
>> File
>> "/home/ninalin/app/pylith/pylith-1.6.1-linux-x86_64/lib/python2.6/site-packages/pylith/feassemble/ElasticityImplicit.py",
>>
>> line 56, in initialize
>> ModuleElasticityImplicit.initialize(self, self.mesh)
>> File
>> "/home/ninalin/app/pylith/pylith-1.6.1-linux-x86_64/lib/python2.6/site-packages/pylith/feassemble/feassemble.py",
>>
>> line 422, in initialize
>> def initialize(self, *args): return
>> _feassemble.IntegratorElasticity_initialize(self, *args)
>> RuntimeError: Error occurred while reading Gocad Voxet file
>> '/home/ninalin/app/pylith/data/vx63/bin/LA_LR.vo'.
>> Could not open Gocad Voxet file
>> '/home/ninalin/app/pylith/data/vx63/bin/LA_LR.vo' for reading.
>> ################################################
>>
>> Thank you!
>> Nina Lin
>> _______________________________________________
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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 <mailto:C.Williams at gns.cri.nz>
>
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