Snapshot

/etc/btrbk/btrbk.conf config file: volume / snapshot_dir btrbk_snapshots subvolume home incremental strict Key points: volume /: “Base path within a btrfs filesystem containing the subvolumes to be backuped (usually the mount-point of a btrfs filesystem mounted with subvolid=5 option).” In this case, we use the existing root directory — which is already a btrfs filesystem (by default on Fedora). btrbk refer this / (next to volume) as “<volume-directory>”. snapshot_dir btrbk_snapshots: btrbk_snapshots is relative to the volume set above, which in this case the / (root directory). So the full path of btrbk_snapshots will be /btrbk_snapshots, which located just under the root directory. It’s like the “destination” of snapshots. subvolume home: home is also relative to / which set above. It’s the “source” of snapshots. There are also a target field can be set: target /mnt/btrbk_backup, but it’s optional. The target is where the “backup” subvolumes to be created (refer to the man page of btrbk.conf via man btrbk.conf), while the snapshot_dir is where “snapshot” to be stored. incremental strict: which means “non-incremental (initial) backups are never created” (man btrbk.conf). What is snapshot? ...