CSC has several computing resources that are available for universities and research institutes. For the geospatial community the most relevant ones are the supercomputer Puhti and the cloud computing environment. Longer introduction of using these computing resources for GIS can be found from CSC pages.
Short instructions on how to use Taito.
Short instructions on how to use cPouta.
A lot of examples for using Puhti, cPouta or Notebooks service for GIS purposes. Puhti examples include both R/Python and the batch job script, also for parallel analysis.