[OpenIndiana-discuss] rpool defragmentation

[Gary Gendel]

# zpool list
NAME      SIZE  ALLOC   FREE  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH ALTROOT
rpool      68G  49.5G  18.5G         -    50%    72%  1.00x  ONLINE -
users     928G  72.4G   856G         -     1%     7%  1.00x  ONLINE -

# zfs list
NAME                    USED  AVAIL  REFER  MOUNTPOINT
rpool                  48.9G  16.9G    82K  /rpool
rpool/ROOT             44.9G  16.9G    22K  legacy
rpool/ROOT/hipster-17  44.9G  16.9G  34.9G  /
rpool/dump             1.97G  16.9G  1.97G  -
rpool/export             32K  16.9G    32K  /export
rpool/swap             2.01G  16.9G  2.01G  -
users                  72.4G   827G  72.3G  /export/home

How does one defragment this?  I thought about creating a new BE and 
then sending the current BE to it, but there doesn't seem to be enough room.

Gary