[Paraview] Invisible volume rendering in client/server mode

[Utkarsh Ayachit]

I think I am able to reproduce the issue. I'll get back to you once I know more.

On Tue, Jul 12, 2016 at 2:23 AM, Gunnar Jansen <jansen.gunnar at gmail.com> wrote:
> 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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