Using snapshots for backupsĪ snapshot resides on the same disk where the subvolume is located. This is a convenient way to perform backups. Added/modified files, and deleted files in the subvolume still reside in the snapshots. Occupied space will increase alongside the data changes in the original subvolume or in the snapshot itself, if it is writeable.
However, taking a snapshot is not like performing a rsync or a cp, and a snapshot doesn’t occupy space as soon as it is created.Įditors note: From the BTRFS Wiki – A snapshot is simply a subvolume that shares its data (and metadata) with some other subvolume, using Btrfs’s COW capabilities. Snapshots are an interesting feature of Btrfs.
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