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A comment on An Introduction to ZFS. Parent comment
-Unlike btrfs subvolumes, zfs datasets can be mounted with different zfs-specific mount options, such as compression algorithms or recordsizes.
-zfs can take atomic recursive snapshots of nested datasets, whereas btrfs snapshots of a subvolume do not include nested subvolumes.
Overall, zfs treats datasets as first-class citizens, whereas the only purpose of btrfs subvolumes seems to be to exclude folders from snapshots.
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-Unlike btrfs subvolumes, zfs datasets can be mounted with different zfs-specific mount options, such as compression algorithms or recordsizes.
-zfs can take atomic recursive snapshots of nested datasets, whereas btrfs snapshots of a subvolume do not include nested subvolumes.
Overall, zfs treats datasets as first-class citizens, whereas the only purpose of btrfs subvolumes seems to be to exclude folders from snapshots.