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Script that does just that - creates backups using snapshot of btrfs filesystem. Also it makes rotation of snapshots by removing old ones and keeping as many snapshots as you want.
This is a pretty naive implementation of replication exact set of subvolumes from one location to another, plays nicely with Just backup btrfs
move noisy directories out of your snapper-configured btrfs subvolumes, cleaning up what's already been replicated
A simple tool for BTRFS subvolumes and snapshots