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Warning!

Puhti and Mahti will be decommissioned after Roihu becomes available. Users should clean up unnecessary files and move any required data by the end of August 2026. See the Roihu data preparation instructions for details.

Puhti scratch is very full: keep only active data there and move or delete everything else. No new Puhti scratch quota will be granted.

What are volumes? How do I use them?

Volumes are virtual block devices exported from a central storage backend to virtual machines. A volume can be attached to one virtual machine at a time. These volumes can be further used to provide different storage options, such as NFS through a virtual machine running an NFS server.

To know how to use volumes on Pouta, see Persistent volumes.