this post was submitted on 19 Jun 2023
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I've been thinking about how to back up my VPS.
The host I have it with does have daily backups, but they cost money and I want to do this as cheaply as possible.
So far I moved the thing from ext4 to btrfs so I could do compression and deduplication to get the "on disk" size as small as I could (without killing CPU usage, of course).
And now that I have btrfs I can also take advantage of snapshots and btrfs send/receive.
My overall plan is to use my provider's snapshotting tool every week or two (likely automatically via their API), and btrfs send things to an unused laptop at home on a more frequent basis. This way, if things do go wrong, I can immediately roll back a week (or two), after which I can "fast forward" to the latest daily(?) backup I have.
Of course I have no idea if this will actually work in practice...