this post was submitted on 17 Feb 2025
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Basically title. I'm in the process of setting up a proper backup for my configured containers on Unraid and I'm wondering how often I should run my backup script. Right now, I have a cron job set to run on Monday and Friday nights, is this too frequent? Whats your schedule and do you strictly backup your appdata (container configs), or is there other data you include in your backups?

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[–] [email protected] 32 points 4 days ago* (last edited 4 days ago) (2 children)

I run Borg nightly, backing up the majority of the data on my boot disk, incl docker volumes and config + a few extra folders.

Each individual archive is around 550gb, but because of the de-duplication and compression it's only ~800mb of new data each day taking around 3min to complete the backup.

Borgs de-duplication is honestly incredible. I keep 7 daily backups, 3 weekly, 11 monthly, then one for each year beyond that. The 21 historical backups I have right now RAW would be 10.98tb of data. After de-duplication and compression it only takes up 407.98gb on disk.

With that kind of space savings, I see no reason not to keep such frequent backups. Hell, the whole archive takes up less space than one copy of the original data.

[–] [email protected] 3 points 3 days ago* (last edited 3 days ago)

+1 for borg


                   Original size      Compressed size    Deduplicated size

This archive: 602.47 GB 569.64 GB 15.68 MB All archives: 16.33 TB 15.45 TB 607.71 GB

                   Unique chunks         Total chunks

Chunk index: 2703719 18695670

[–] [email protected] 5 points 4 days ago

Thanks for sharing the details on this, very interesting!