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All subvolumes share the space of the Btrfs volume. You may create subvolumes at will. (You may think of subvolumes as sort of "dynamic partitions" inside a Btrfs volume) | All subvolumes share the space of the Btrfs volume. You may create subvolumes at will. (You may think of subvolumes as sort of "dynamic partitions" inside a Btrfs volume) | ||
When making snapshots (or send/receive) every subvolume will be handled separately. For example when you have 2 subvolumes(@, @home), and make a snapshot of one of them(@), this snapshot will contain every bit of data of all | When making snapshots (or send/receive) every subvolume will be handled separately. For example when you have 2 subvolumes(@, @home), and make a snapshot of one of them(@), this snapshot will contain every bit of data of all files in this subvolume(@), but none of the data from the other subvolume(@home). So if you make a few subvolumes, you are able to '''follow different strategies for snapshots''' of them. And you can '''restore''' each of them '''separately'''. | ||
By convention the names of subvolumes start with '''@ (@home, @snapshots''' ...). | By convention the names of subvolumes start with '''@ (@home, @snapshots''' ...). | ||
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=== subvolume '''@home''' === | === subvolume '''@home''' === | ||
This is the subvolume where all '''user data''' ist stored. When you rollback your "@", this will not change at all. You may take snapshots of /home at a different rate and for different reasons. While snapshots of "@" are good for rollback, snapshots of @ | This is the subvolume where all '''user data''' ist stored. When you rollback your "@", this will not change at all. You may take snapshots of /home at a different rate and for different reasons. While snapshots of "@" are good for rollback, snapshots of @home are good for '''undeleting''' accidentally by users deleted (or overwritten) files. | ||
=== subvolume '''@snapshots''', '''@home.snapshots''' === | === subvolume '''@snapshots''', '''@home.snapshots''' === |