Berzelius Storage policy

Berzelius Storage is intended for storage of actively used data associated with ongoing computing projects on Berzelius.¹ Storage is allocated to Berzelius projects according to the Berzelius storage allocation policy, and is limited both by volume (bytes), and number of files stored.²

Being a limited resource, storage must be used efficiently and in a way that does not cause problems for NSC staff or other projects. This includes using suitable file formats, compressing data when appropriate, packaging data in archive formats (e.g tar, zip) when appropriate and also includes how applications perform I/O (e.g not doing unnecessary I/O or I/O patterns that cause problems for other users)

Projects that continue under another name can keep their storage directory name (/proj/projname), but the amount of data that can be stored is determined by the continuation project’s allocation.

After the Project has Ended

Data that remains in a project directory after the project has ended (and is not directly followed by a continuation project) will³ by this policy be handled as follows

• 15 days after the project ends, the storage directory becomes read-only.
• 30 days after the project ends, the storage directory will disappear from view.
• 60 days after the project ends, the data will be manually deleted (i.e. “irreversibly removed”) to make room for active projects. We will attempt to by email (the one registered in SUPR) warn the project PI and all members that have stored data in the project storage directory before this happens some time in advance.

As mentioned, we will attempt to send reminder emails before data deletion happens, but we do not guarantee it (accidents and mistakes happen), securing scientific results is the responsibility of the researchers at all times.