zfs share multiple hosts

bash-3.2# zfs set sharenfs=on /backup

bash-3.2# zfs set sharenfs=rw=host1,root=host2 zpool/backup

bash-3.2# share

-               /backup   sec=sys,rw=host1:host2,root=host1:host2   ""

root@minnie # showmount -e host1

export list for NFS_server:

/backup host1,host2