On Wed, 2008-02-06 at 13:42 -0600, Michael Hale wrote:
> Hello everybody,
>
> I'm thinking of building out a second machine as a backup for our mail
> spool where I push out regular filesystem snapshots, something like a
> warm/hot spare situation.
>
> Our mail spool is currently running snv_67 and the new machine would
> probably be running whatever the latest opensolaris version is (snv_77
> or later).
>
> My first question is whether or not zfs send / receive is portable
> between differing releases of opensolaris. My second question (kind
> of off topic for this list) is that I was wondering the difficulty
> involved in upgrading snv_67 to a later version of opensolaris given
> that we're running a zfs root boot configuration
For your first question, zfs(1) says:
zfs upgrade [-r] [-V version] [-a | filesystem]
Upgrades file systems to a new on-disk version. Once
this is done, the file systems will no longer be acces-
sible on systems running older versions of the software.
"zfs send" streams generated from new snapshots of these
file systems can not be accessed on systems running
older versions of the software.
The format of the stream is dependent on just the zfs filesystem version
at the time of the snapshot, so as they are backwards compatible, a
system with newer zfs bits can always receive an older snapshot. The
current filesystem version is 3 (not to be confused with zpool which is
at 10), so it's unlikely to have changed recently.
The officially supported method for upgrading a zfs boot system is to
BFU (which upgrades ON but breaks package support). However, you should
be able to do an in-place upgrade with the zfs_ttinstall wrapper for
ttinstall (the Solaris text installer). This means booting from CD/DVD
(or netbooting) and then running the script:
http://opensolaris.org/jive/thread.jspa?threadID=46588&tstart=255
You will have to edit it to fit your zfs layout.
> --
> Michael Hale
> <[EMAIL PROTECTED]
> >
> Manager of Engineering Support Enterprise
> Engineering Group
> Transcom Enhanced Services
> http://www.transcomus.com
>
>
>
-Albert
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