Backup on Betzy, Fram, Saga, and NIRD

Warning

Only home directories with enforced quotas are backed up

Any $HOME area using more then 20 GiB or more than 100000 files is not backed up. To have your $HOME backed up, you need to shrink the disk usage below the 20 GiB limit and below 100000 files and notify support.

If “dusage” repots 0 Bytes limits, this means that you do not have disk quotas activated and this means that these folders are not backed up.

Warning

Betzy: NO BACKUP

Backup on Betzy will be switched on only after the pilot period is finished.

Betzy, Fram and Saga

Home directories on Betzy, Fram and Saga (/cluster/home/$USER) are backed up nightly to user’s home directory on NIRD (/nird/home/$USER/backup/fram or /nird/home/$USER/backup/saga).

$HOME/nobackup and $HOME/tmp directories are excluded from the backup.

The nnXXXXk project directories (/cluster/projects/nnXXXXk) are backed up nightly to NIRD.

The shared areas in /cluster/shared are not backed up to NIRD.

The scratch areas in /cluster/work/jobs and /cluster/work/users do not have any backup.

NIRD

Both home directories (/nird/home/$USER) and project areas (/nird/projects/NSxxxxK) have backup in the form of snapshots and geo-replication.

Snapshots are taken with the following frequencies:

  • /nird/home/$HOME:

    • daily snapshots for the last 7 days

    • weekly snapshots for the last 6 weeks

    • this also includes snapshots of the Betzy, Fram and Saga home directory backup

  • /nird/projects/NSxxxxK:

    • daily snapshots for the last 7 days

    • weekly snapshots for the last 6 weeks

Snapshots are available at the following places:

  • /nird/home/u1/.snapshots

  • /nird/projects/NSxxxxK/.snapshots

How to recover deleted/overwritten data

To recover a deleted or overwritten file /nird/projects/NSxxxxK/dataset1/myfile, you can copy a snapshot back to the folder and restore the deleted/overwritten file:

$ cp /nird/projects/NSxxxxK/.snapshots/DATE/dataset1/myfile /nird/projects/NSxxxxK/dataset1/

Select the DATE accordingly to your case.

Similarly, a deleted/overwritten file in the home directory can be recovered like this:

$ cp /nird/home/u1/.snapshots/DATE/$USER/mydir/myfile /nird/home/$USER/mydir/

Note that snapshots are taken every night only. This means that deleted files which did not exist yet yesterday cannot be recovered from snapshots.