V-Ray Next GPU Distributed Rendering Performance Issues

[ScottD]

I've noticed some rather interesting performance when using Distributed Rendering with V-Ray Next GPU (4.02.04), in which it does not look like that Distributed Rendering is contributing all that much to the overall rendering.

I have two machines that I primarily use for rendering. (Both on the latest version of Win10.)

Main Workstation:
3x Quadro K60000

Render Server
1x Quadro GP100

Benching marking the performance on a scene I am working on, I see the following with all hardware enabled for rendering:

Worktation (Solo): 25min
Render Server (Solo): 32min
Workstation (Server on DR): 21min

Seeing that my render server, which is almost on par with my main workstation, only saves me 4 minutes of render time seems pretty weak. I noticed while the Render Server is rendering, that the GPU utalization is consistenly bouncing from 100% all the way down to 0 every few seconds. I have played with the Ray Bundle Size number, including increasing to 256+, and that has actually increased the rendering time by an additional 3 minutes.

Now I'm not expecting to cut my render time compeltey in half with this, but I feel like I'm not getting the complete performance out of my server. Is there anything else I can look at to help with this? Or has anyone seen this behavior before? I'd be more than happy to share my scene files.

Thank you,
-S

[Morbid Angel]

I am speaking hypothetically but progressive rendering is not very efficient over network, unless you have 10 gigabit or something similar. Even on cpu the performance will be degraded. I think we have to wait for cuda bucket rendering then it will be better. If you want to utilize two cards best thing is to have them together in one motherboard.

[ScottD]

Yeah that oddly/sadly enough does make sense....

[savage309]

Try increasing rays per pixel, keep the old Ray bundle size.
if you render different frames, rendering different frames in different nodes always work best.
We will have bucket mode soon, it will also help.

Best,
Blago.

[ScottD]

Thank you Blago! That totally helped. I thought I had played with that setting already, but perhaps I didn't increase it high enough to make a difference. I set it to 64 and was able to cut my render time down to 15 minutes. Which is more in line where I expected it to be.

[gregvfx]

Hi, I have Connection timeout errors Could not use any of the blah blah
Any clue why?

[savage309]

Hi, I have Connection timeout errors Could not use any of the blah blah
Any clue why?

Not really, maybe there really is network problem?

Best,
Blago.