ZFS deduplication

• Automatic deduplication and compression of data, selectable per volume or filesystem according to administrator policy

zfs set dedup=on POOL_NAME/FS_NAME

zpool list POOL_NAME

Before activating deduplication:

zpool list ZPOOL_NAME
NAME        SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH  ALTROOT
ZPOOL_NAME  7.25T   163G  7.09T         -     0%     2%  1.00x  ONLINE  -

zpool get all ZPOOL_NAME | grep dedup

See also

• ZFS: ZFS deduplication, ZFS snapshot, zfs list, zpool status, zpool create, zfs create, zfs get all, zfs set, zfs mount, zfs umount, zfs rollback
• deduplication

https://wiki.ubuntu.com/ZFS