Alvis data migration¶

Last update: 2026-04-01

As Alvis is currently planned to be decommissioned 2026-06-30, this page is to help you prepare for the upcoming move to Arrhenius.

Migrating your project storage will take significant time. Data migrating can take days to over a week if you have many files in your project storage.

Arrhenius GPU run ARM¶

Arrhenius GPU partition runs on Grace Hopper nodes https://www.naiss.se/resource/arrhenius/.

This means any software build for x86 CPUs (everything from Intel and AMD) will not work. There is no point to migrating software installations.

Smaller storage¶

With the move to Arrhenius, you should expect a significant reduction in storage allocations overall.

Start cleaning today¶

You can help yourself already today by cleaning out storage areas as much as possible. This not only will help you reach any new allocation limits, but may also massively speed up the time to sync the data from Alvis at Chalmers to Arrhenius in Linköping.

In particular, number of files is a big concern and can cause syncing data to take weeks.

1. Old checkpoints, logs etc.
2. Datasets that are easy to download again, and are not actively used today.
3. Software installations (including Python and Conda environments). These will not work on Arrhenius anyway.
4. Containers, you need to rebuild or re-download these on Arrhenius.

Helping you migrate data¶

We are looking at how to help user migrate data and map user IDs on the new system, but such data migration will still take a long time due to the sheer number of files. If you reduce your usage, syncing will be faster.