[Paraview] RAM friendly file format?

[Dominik Szczerba]

noelieboy at online.ie wrote:
> I appears to crash when it is trying to render the model. I select the
> file to open, its takes approx 6/7 minutes to read, and during the
> rendering process, when the progress bar at the bottom right corner of
> the paraview gui is approaching 100% is crashes. This is before anything
> is dispayed in the 3d view window. So I am not entirely sure if it is
> because RAM is exceeded or perhaps graphics card memory? I am trying to
> display a model with 15million unstructured grid polygons. Would binary
> legacy files allow larger models (models with more polygons) to be
> displayed, or would using binary files only help with the actual vtk
> file size and file reading time? the memory monitor at time of crash for
> the paraview application is:
> CPU:92%
> CPU time:0:07:03
> Mem Usage:798,184 K
> Mem Delta:118,360 K
> VM size:1,027,240 K

did you monitor resources during the process

> 
> When i look at the paraview trace file, there are loads of the following
> error, each with a different element number:
> 
> # Error or warning:
> # There was a VTK Error in file:
> c:\dev\paraview24\vtk\common\vtkDataArrayTemplate.txx (241)
> #  vtkIdTypeArray (0EE032F8): Unable to allocate 41943170 elements of
> size 4: bad allocation

this is a request for 160MB contiguous memory chunk, might simply be
unavailable if you loaded many files before and thus segmented the memory.

DS

> 
> Have i exceeded the number of elements that paraview can display,
> regardless of file type?
> 
> 
> thanks for any help you can give!
> 
> 
> Quoting mattijs <m.janssens at opencfd.co.uk>:
> 
>> binary legacy VTK files are probably as ram efficient as any.
>>
>> Does paraview crash when reading the file or when displaying it? If
>> the first
>> your files are probably excessively big, if second the file format
>> does not
>> matter. Did you monitor the ram usage?
>>
>> Can you split your problem into smaller files? Write different results to
>> different files?
>>
>>
>> On Friday 03 February 2006 09:30, noelieboy at online.ie wrote:
>>
>>> Hi there,
>>> I am currently writing legacy VTK files of a surface made
>>> unstructured_grid using fortran 90, and look at them  in Paraview that
>>> is installed on my desktop PC (2GB RAM). I now want to start viewing
>>> large models and using the current method the files are getting big and
>>> also paraview crashes (i assume due to lack of RAM). Is there any
>>> particular file format (xml/ensight etc) that is designed to use less
>>> system ram when visualising the models, for the same model detail? And
>>> as a second question, which one would be the recommended format for
>>> generation using fortran90 ?
>>>
>>>
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>>
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> 
> 
> 
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-- 
Dominik Szczerba, Dr.
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi