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VisIt is an open source, versatile software for scientific visualization. VisIt is available on Puhti and we recommend the Puhti web interface remote desktop for running the GUI.


You can now also enable interactive visualization with GPU acceleration for better performance. In this case, select Accelerated visualization instead of Desktop in the Puhti web interface.


VisIt is free also for commercial use and has been released under BSD Open Source License

Parallel use

VisIt can be run interactively in parallel configuration using several processors. Login to Puhti and submit the following to launch VisIt on a compute node

module load visit/3.1.3
visit -l srun -np 2 -p test -t 00:10:00 -la --mem-per-cpu=2G -la --account=<your project>

The job reservation parameters are:

  • -np <number of cores>
  • -p <queue>
  • -t <time> (hours:minutes:seconds)
  • -la --mem-per-cpu=<memory per processor> (in GB)
  • -la --account=<the billing project for the job>

Note that running VisIt with many processors does not necessarily bring speed benefits. It will depend on VisIt's particular data reader if (and to what extent) the data can be distributed between the processors.

Using host profile of local VisIt installation

The VisIt client can be run on your local desktop computer while having VisIt components that process the data remotely on Puhti. Local VisIt host profiles can be used to launch jobs on Puhti compute nodes. Local and remote VisIt versions have to match.

An example of a working host profile is screen captured below. Note that job reservation parameters that are not directly available as profile options should be given as Advanced/Launcher arguments, see the last screen capture.

Puhti screen capture 1

Puhti screen capture 2

Puhti screen capture 3

Puhti screen capture 4

More Information

Last update: May 9, 2023