Btrfs: Subvolumes and snapshots

The previous installment in LWN's ongoing series on the Btrfs filesystem covered multiple device handling: various ways of setting up a single filesystem on a set of physical devices. Another interesting aspect of Btrfs can be thought of as working in the opposite manner: subvolumes allow the creation of multiple filesystems on a single device (or array of devices). Subvolumes create a number of interesting possibilities not supported by other Linux filesystems. This article will discuss how to use the subvolume feature and the associated snapshot mechanism.

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