Add a static canary subvolume chunks in deep glacier - Githubissues

candide-guevara / btrfs_to_glacier

Makes periodic snapshots of my btrfs volumes and upload them to Glacier.

GNU General Public License v2.0

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Add a static canary subvolume chunks in deep glacier #4

Open candide-guevara opened 3 years ago

candide-guevara commented 3 years ago

Problem

I want to have a "quick" way to check I can restore chunks from deep glacier into a btrfs subvolume.

Solution

Put a static subvolume (aka the same subvol for any backup) in a canary storage infrastructure.

Metadata is hardcoded so that metadata infrastructure is not needed to restore it.
Just add enough data for a single subvolume (chain restores will be tested using another mechanism).
len(chunks) > 1 but do not put a lot of data since this test costs money.
This static subvolume is created only once. It is written when you create a new backup chain.

A conscious user can run this at least once a year and check all is ok. The only issue is that it will cost a few cents and take a few hours.