# Rendering of large dataset in pvbatch script on computational node

**URL:** https://discourse.paraview.org/t/rendering-of-large-dataset-in-pvbatch-script-on-computational-node/15595
**Category:** ParaView Support
**Tags:** python
**Created:** [October 21, 2024, 10:04am UTC](https://discourse.paraview.org/t/rendering-of-large-dataset-in-pvbatch-script-on-computational-node/15595 "2024-10-21T10:04:10Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![caddfc](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/c/a6a055/32.png) [@caddfc](https://discourse.paraview.org/u/caddfc)
#### Post date: [October 21, 2024, 10:04am UTC](https://discourse.paraview.org/t/rendering-of-large-dataset-in-pvbatch-script-on-computational-node/15595/1 "2024-10-21T10:04:11Z")

</div>

Good afternoon,  
so I have an automatisation pvbatch script for opening a large dataset of .pfb type slicing the 3D to 2D adjusting view and than taking a screenshot. This worked now well for with netcdf before and also for .pfb (with the corresponding plugin) and a small dataset. (MB)  
But for a very large dataset(GB) eventhough running interactivly with xpra on a supercomputer node, I only get the gray background in the screenshot.

Any ideas would be very appreciated, if it helps I can also share more code.  
(I just use the PFBreader with ns.global option, the sliceing and adjusting view with renderView (which works fine as i want for small datasets and I also do .UpdatePipeline and Hide() for the original data and show for the slice and at the end i do renderView.ResetCamera() and Render() and `ImageResolution=renderView1.ViewSize.  
As I said it works fine for small datasets I just get the gray background for very large datasets how can I adapt my program or is it even possible?

To run the script at the end I run the program while being on the node interactivly with:  
OMP\_NUM\_THREADS=48 srun -c 48 “$PARAVIEW\_PATH”/bin/pvbatch “$PARAVIEW\_SCRIPT” “$NETCDF\_FILE” --use-offscreen-rendering

I have the amount of points in slice:757291520  
And the needed memory size:61771520 bytes  
So it is really large compared to the smaller one.  
Maybe is there a way to reduce the grid points amount (average 10 nearest points in paraview with the filters?).

Any ideas would be very appreciated!