[Paraview] Problems loading .vtu beyond a certain resolution

[Erik Keever]

Berk,

That may be; I haven't checked the routine that generates cell connectivity in 
our exporter yet. I agree that for larger output sets ascii will be too slow. 
It's already a bit plodding for ~1-2M cell simulations, and we're looking at 
5-20M cells fairly soon.

It just seems odd that so far smaller datasets work fine and larger ones 
always seem to fail though. Shouldn't bad connectivity fail indiscriminately?

-- Erik

On Friday 05 March 2010, you wrote:
> I don't think that this has anything to do with any limitation. I suspect
> that there is
> something wrong in the connectivity of your mesh. Both of those methods use
> the
> connectivity information and are likely to crash if you have cells pointing
> to non-
> existent point ids for example.
>
> By the way, I don't recommend using the XML formats in ASCII mode for this
> size
> data. The reader is pretty slow in parsing ASCII files. You would get
> significant
> read-time improvement by using the appended mode (raw - no compression or
> encoding) or even the legacy format in binary. If you must do ASCII, I
> suggest
> using the legacy format.
>
> Cheers,
> -berk
>
> On Fri, Mar 5, 2010 at 2:21 AM, Erik Keever <ejkeever at nerdshack.com> wrote:
> > Hello,
> >
> > I'm using Paraview for visualization of 3D hydrodynamic and mhd
> > simulations.
> > My datasets are generated by a code with a structured grid and are
> > exported to VTK in ascii format. Data for each variable (rho, p, e, B,
> > gravity) is exported as one block in a <DataArray></DataArray>, with
> > point data and cell
> > data in 4 similar arrays with 3, 8, 8 and 12 times as many entries as
> > there are points .
> >
> > Trying to open a 100^3 dataset brings about a segfault in libvtkGraphics:
> > 0x00007fffe9742d88 in vtkDataSetSurfaceFilter::InsertQuadInHash(long
> > long, long long, long long, long long, long long) ()
> > from /usr/lib64/paraview-3.6/libvtkGraphics.so.pv3.6
> >
> > Opening a 99x100x100 and trying to apply CellDataToPointData causes a
> > different crash:
> > 0x00007fffe7bbfe21 in vtkCellLinks::BuildLinks(vtkDataSet*,
> > vtkCellArray*) ()
> >   from /usr/lib64/paraview-3.6/libvtkFiltering.so.pv3.6
> >
> > A 95x100x100 opens and works. My colleague has read that this may be a
> > limit
> > in the serial vtk format, e.g.
> > http://www.paraview.org/pipermail/paraview/2009-September/013768.html
> >
> > Is this fixable or do we need to export to a different format?
> >
> > -- Erik
> >
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