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Local backup on TrueNAS (mander.xyz)

submitted 8 months ago by [email protected] to c/[email protected]

5 comments fedilink hide all child comments

I am building my 3-2-1 backup system and wanted to add an external HD to my TrueNAS machine. Since it only works with ZFS, I thought of setting up that drive as a compressed, dedup ZFS volume.

I have a truckload of NVMe left on the boot drive that I could repartition and turn some of the free space as a dedup vdev for the backup drive. I don't have any other physical bays to add a dedicated drive on the machine.

A) Is that a bad idea? What are the downsides of using the boot drive like that?

B) Which tool do you recommend for local backup? I'm looking for actual incremental backup, not just a sync tool.

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[–] [email protected] 2 points 8 months ago (1 children)

Restic is my tool of choice for deduplicated encrypted verifiable compressed incremental backups.

[–] [email protected] 1 points 8 months ago (1 children)

In that case, what would be better in terms of memory / CPU usage: dedup and compression at the filesystem level or disabling it and doing it at the tool level?

[–] [email protected] 2 points 8 months ago* (last edited 8 months ago)

You can’t dedup/compress restic repos at fs level due to the encryption.

Nice thing is you get those even with „dumb“ targets that can‘t do those for you.