# Fast volume rendering of time series on GPU cluster

**URL:** https://discourse.paraview.org/t/fast-volume-rendering-of-time-series-on-gpu-cluster/621
**Category:** ParaView Support
**Created:** [September 23, 2018, 12:30pm UTC](https://discourse.paraview.org/t/fast-volume-rendering-of-time-series-on-gpu-cluster/621 "2018-09-23T12:30:20Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![robertsawko](https://discourse.paraview.org/user_avatar/discourse.paraview.org/robertsawko/32/6283_2.png) [@robertsawko](https://discourse.paraview.org/u/robertsawko)
#### Post date: [September 23, 2018, 12:30pm UTC](https://discourse.paraview.org/t/fast-volume-rendering-of-time-series-on-gpu-cluster/621/1 "2018-09-23T12:30:20Z")

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I am playing with remote visualisation of relatively large data sets (~300GB per case, about 30 cases). Generally my objective is to accelerate post-processing tasks for me and my colleagues, but I appreciate I am still quite new to using PV in client-server mode and in parallel. There may be swathes of background I am missing. I feel I have five million questions on all sorts of subjects, but to focus the discussion I want to start with volume renders as I am just studing the performance.

I am converting my files from serial Ensight to VTMs. VTMs are arranged in separate time steps and decomposed with ParaView’s D3 to 64 subdomains. I am using a build v5.6 a Release build on a P8+4xP100 nodes using EGL backends. @utkarsh.ayachit has already helped me a lot by pointing out to “Use Data Partitions” option in the “Miscellanous” section. This appears to suppress the re-decomposition of the data everytime I play the volume. The video becomes sensibly quick but when I watch GPUs they still work only for a fraction of time. Are there any other tricks I can do to accelerate this process?

I am investigating:

1. alternative data formats for temporal, mesh and field data (preferrably parallel I/O),
2. temporal cache data filter,
3. different decomposition techniques: mode, ghost regions etc,
4. different cpu/gpu ratios,
5. keep the case in RAM (cluster nodes have 100s of GBs of RAM).

If you do have any advice, do let me know. I speak C++ and basic VTK so I am happy to dig in the code, but also any non-code references on the subject of parallel rendering will be much appreciated.