[Paraview] catalyst with parallel rendering

[Mark Olesen]

Hi Andy,

Welcome back from hols!

This actually missed the question.

I assume that we get whatever pvserver up and running in parallel 
(generally have indeed used a pvserver build with mesa and llvmpipe 
rendering), how do we attach to it from catalyst?

Using a GUI "connect" button seems pointless/self-defeating, but how can 
I convey to catalyst that I'd like to connect to a particular server?

Cheers,

/mark

On 06/01/18 16:56, Andy Bauer wrote:
> Hi Mark,
> 
> If you want to create images from Catalyst runs you'll probably want to 
> build the ParaView that you're linking to with either OSMesa or EGL (and 
> Qt disabled). This gets around needing the X context for rendering since 
> I believe running with offscreen enabled is not sufficient. EGL comes 
> with most of the NVIDIA drivers -- see 
> https://blog.kitware.com/off-screen-rendering-through-the-native-platform-interface-egl/ 
> for how to build PV with it. If you want to go the OSMesa route I'd 
> recommend using the ParaView superbuild 
> (https://gitlab.kitware.com/paraview/paraview-superbuild) to build it 
> for you.
> 
> Does this answer your question? I just got back from vacation and am 
> trying to catch up on more things than my brain can currently handle so 
> let me know if you have more questions.
> 
> Best,
> Andy
> 
> 
> 
> On Mon, May 28, 2018 at 11:25 AM Mark Olesen <Mark.Olesen at esi-group.com 
> <mailto:Mark.Olesen at esi-group.com>> wrote:
> 
>     For the mailing list, since this must probably be a FAQ (even if I seem
>     to find the answer in the usual places).
> 
>     I would like to have paraview rendering in parallel for a simulation
>     with catalyst. For simplicity, I'm fiddling about on a local
>     workstation, but would like to generalize later. it should work without
>     live visualization enabled, or requiring a GUI to connect.
> 
>     I'd presume using something like the following
> 
>     mpirun -np 12 pvserver --server-port=123456 --force-offscreen-rendering
> 
>     would be setup a parallel rendering session as usual. However, after
>     scouring docs there doesn't seem to be an obvious way to connect this
>     within catalyst (without a GUI).
> 
>     The only access point that I seem to find is to define an MPI
>     communicator for initializing catalyst after some how (some hand-waving
>     here) querying a pvserver connection for its host topology and defining
>     an appropriate communicator.
> 
>     Cheers,
> 
>     /mark
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-- 
Dr Mark OLESEN
Principal Engineer, ESI-OpenCFD
ESI GmbH | Einsteinring 24 | 85609 Munich | GERMANY
Mob. +49 171 9710 149
www.openfoam.com | www.esi-group.com | mark.olesen at esi-group.com