[Paraview] Invisible volume rendering in client/server mode

[Gunnar Jansen]

Oh, I forgot to mention the data type in my previous post.
You are indeed right, it is an unstructured grid. In order to make sure it
is not related to my input files, I tried with the example case XX as well
with the same results.
ParaView was built with the OpenGL2 rendering backend, as this seems to be
the new standard also with the pre-compiled clients.
I think this is not a MPI issue, as also starting only a single process
does not solve the problem.

Gunnar

2016-07-11 20:35 GMT+02:00 Utkarsh Ayachit <utkarsh.ayachit at kitware.com>:

> Odd. I wonder if it's driver related. Did you build ParaView with
> VTK_RENDERING_BACKEND set to OpenGL2? Also, "-tdx"/"-tdy" could indeed
> slow things down as it's now rendering for a tiledisplay rather than
> for a client. The rendering works in that case, since the client is
> rendering on it's own. Also what is the datatype you're rendering? I'd
> suspect it's an unstructured grid or a multiblock of unstructured
> grid.
>
> Utkarsh
>
> On Sat, Jul 9, 2016 at 3:28 AM, Gunnar Jansen <jansen.gunnar at gmail.com>
> wrote:
> > Dear ParaView users,
> >
> > I recently set up a pvserver on our small cluster. I used the most recent
> > stable ParaView release 5.1 and compiled from source.
> >
> > The connection and rendering in client/server mode works fine in all
> > representations except the "Volume" rendering. Here, depending on the
> model,
> > either no model is shown at all (just the standard 3D render screen), or
> the
> > previous representation with artifacts shows up. This seems to be a
> problem
> > of the --use-offscreen-rendering flag that I use in the pvserver startup.
> >
> > I run the server on a node with 2 CPU (with 10 cores each) and 2 Nvidia
> > Tesla K40c. I start the server with:
> >
> > xinit /usr/mpi/gcc/openmpi-1.6.5/bin/mpirun -np 4 pvserver -display :0.0
> > --use-offscreen-rendering   : -np 4 pvserver -display :0.1
> > --use-offscreen-rendering
> >
> > In the client the threshold for remote rendering is set to 0.
> >
> > If I pass additionally the -tdx=1 and -tdy=1 flags the volume rendering
> is
> > performed correctly, but the overall speed is decreased greatly.
> >
> > Thank you in advance for any help!
> >
> > Gunnar
> >
> >
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