btrbk
Tool for creating snapshots and remote backups of btrfs subvolumes
btrbk is a snapshotting and backup tool tailored for Btrfs that automates consistent, incremental backups using btrfs send/receive. It creates atomic snapshots of subvolumes, then efficiently transfers only changed blocks to local or remote targets over SSH. A declarative configuration describes sources, targets, and retention policies (hourly/daily/weekly/monthly), and btrbk enforces pruning so backup stores don’t grow without bound. The tool supports hierarchical setups—many subvolumes to...