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[General] Rendering Speedup (3 Minutes per Step)

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Old   July 15, 2014, 14:05
Default Rendering Speedup (3 Minutes per Step)
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Tobias Holzmann
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Dear all,

I have just a very simple question to you.
While rendering my actual project (multiphase ~ 2.000.000 cells, hexadominant from snappyHexMesh) one rendering step takes round about 3 minutes. I have 1200 steps to render. Therefor I should run my computer for 3600 minutes --> 60h.

This time is "okay" if I will render it during weekend but I think this problem could be speed up in an very good way, isn't it?

First some information

My personal desktop pc:

  • CPU: FX-8150 (8 xore)
  • Mainboard: Crosshair Formula IV

My cluster:

  • CPU: 2x Opteron 6200 (12 Core)
  • Mainboard: Supermicro h8dgi-f
  • GPU - Onboard 16 MB (so none)

At the moment I use paraview on my desktop PC and the rendering step take ~ 3 minutes.

So is there a way to make it faster, any link, literature, hints are recommended.

I think there are users that doing high rendering with PV.
There should be a way to speed it up!



  • setting up a PV server on my cluster with OSMesa and off-screen-rendering does not work --- I can not see volume rendering on my client.
  • setting up a pv server on my local machine is the same as use pv as single client - render time ~ 3 minutes.

Regards Tobi
Keep foaming,
Tobias Holzmann
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Old   November 12, 2019, 02:56
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Did you manage to speed up your renders? I am sitting in a similar situation that volume renders take very long to load.
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Old   November 19, 2019, 10:43
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With a "traditional" CPU rendering approach, there are usually two bottlenecks that can be reduced:
1) CPU processing time. Start Paraview in parallel on more than one core
2) I/O bottleneck. Paraview has to read the data for each new step from disk. Use faster storage, ideally NVMe SSDs or something with similar read speed. And of course, make sure there are no slow interconnects between the machine that runs Paraview, and the storage device.
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Old   November 20, 2019, 01:33
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Thanks for the reply,
I have only just recently learnt about running paraview in parallel which is helping but it seems it will only run in parallel automaticity with certain data while a recomposed case will not, and a decomposed case has volume rendering problems on my Mac. It noticed the storage speed problems, unfortunately my mother board canít take NVMe but I bought another SSD for my computer and more ram. So I hope it helps.
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