ZFS have abilities to save snapshot as file object or save snapshot to other remote.
As I will focus on save snapshot to other remote, only two simple commands that involve here which are zfs send, zfs receive.
The basic concept is send snapshot that you want to send to other remote by ssh protocol and make the remote understand that you gonna give the snapshot
so the commands will be
zfs send [name of the snapshot] | ssh [username]@[remote (ip or hostname)] zfs receive [name of zfs volume]
for example
zfs send DV/Sn03 | ssh reski@zfsserver zfs receive DV/Sn03
If you receive error such as zfs command not found, the solution is that you write full path of zfs in the remote size.
zfs send DV/Sn03 | ssh reski@zfsserver /usr/sbin/zfs receive DV/Sn03
if you receive error such as cannot receive new filesystem stream: permission denied, the solution is that you have to assigned some kind of some ACL permissions to that ZFS volume (remote side). Basic permissions for this remote replication are mount, create and receive
zfs allow everyone mount,create,receive DV/Sn03
* as prerequisite : you should define DV/Sn03 first before you do zfs allow
Additional notes, to send incremental updates, just modify above command
zfs send - [name of the first snapshot] [name of the second snapshot] | ssh [username]@[remote (ip or hostname)] zfs receive [name of zfs volume]
for example
zfs send -i DV/Sn03@1 DV/Sn03@2 | ssh reski@zfsserver zfs receive DV/Sn03
additional note:
if you find message like this
cannot receive new filesystem stream: destination 'VD03/dataVM' exists
must specify -F to overwrite it
it means you have to do it like this
zfs send -i DV/Sn03@1 DV/Sn03@2 | ssh reski@zfsserver zfs receive -F DV/Sn03
Reference :
- http://docs.huihoo.com/opensolaris/solaris-zfs-administration-guide/html/ch06s03.html
- http://www.markround.com/archives/38-ZFS-Replication.html
- http://docs.oracle.com/cd/E19082-01/817-2271/gfwqj/index.html
