zfs split may also be undocumented depending on your distribution.
j.
On 10/28/15 5:08 PM, jason matthews wrote:
At home, I do nothing for rpools. I dont even mirror them and I havent
even written out a process for recovery. I assume I can just reinstall
and re-import any custom xml files for smf that i have archived.
for work, i have automation to rebuild rpools but i dont back them up.
Here is one thought. Use snapshots on your rpool, synchronize one or
more mirrors once per day on a rotation basis. once complete, split
the mirror. I would nail the boot device in the LSI config using
alt-b. this command sequence might be hidden depending on the version
of firmware on your controller. make sure you are install the grub
boot blocks too.
I havent tested this and the one time i actually tried to split a
mirror the system crashed. It might be worth exploring though.
j.
On 10/28/15 4:24 PM, Bob Friesenhahn wrote:
What is the recommended approach to back up a zfs root pool?
For other pools I use zfs send/receive and/or rsync-based methods.
The zfs root pool is different since it contains multiple
filesystems, with the filesystem for one one BE being mounted at a time:
% zfs list -r -t filesystem rpool
NAME USED AVAIL REFER MOUNTPOINT
rpool 79.7G 377G 50K /rpool
rpool/ROOT 29.5G 377G 31K legacy
rpool/ROOT/openindiana 15.8M 377G 3.15G /
rpool/ROOT/openindiana-1 38.9M 377G 5.97G /
rpool/ROOT/openindiana-2 40.6M 377G 11.3G /
rpool/ROOT/openindiana-2-backup-1 124K 377G 10.5G /
rpool/ROOT/openindiana-3 48.4M 377G 13.2G /
rpool/ROOT/openindiana-3-backup-1 76K 377G 11.4G /
rpool/ROOT/openindiana-3-backup-2 45K 377G 11.5G /
rpool/ROOT/openindiana-3-backup-3 123K 377G 11.9G /
rpool/ROOT/openindiana-3-backup-4 44K 377G 12.1G /
rpool/ROOT/openindiana-4 20.1M 377G 18.8G /
rpool/ROOT/openindiana-4-backup-1 95K 377G 13.3G /
rpool/ROOT/openindiana-4-backup-2 156K 377G 18.8G /
rpool/ROOT/openindiana-5 17.5M 377G 18.9G /
rpool/ROOT/openindiana-6 29.4G 377G 17.6G /
rpool/export 121M 377G 32K /export
rpool/export/home 121M 377G 32K /export/home
This means that there are multiple filesystems which would need to be
backed up in order to save a replica of the pool.
At the moment I am using rsync-based backup of only selected
filesystems.
It is not clear to me where configuration due to utilities like
'ipadm' and 'dladm' is stored, but I am pretty sure it is to files
under the /etc directory.
What is recommended/common practice for backing up the root pool?
Bob
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