On 7/11/2011 5:59 AM, Matthew Seaman wrote:
On 11/07/2011 11:20, Dick Hoogendijk wrote:
OK, so now my ZFS on root FreeBSD-8.2 system runs smoothly and I'm very
happy being able to have ZFS (coming from solaris11), but.. what is the
best strategy to back this fbsd system up. do I create various ZFS
backup filesystem streams or can I easely backup the zroot pool as a
whole? And if yes, how?
Grateful for all the help I can get in these matters.
[...]
What ZFS does get you in terms of backups are two things:
1) Really easy and unlimited amounts of snap-shotting. As well as
making it really simple to get a coherent point-in-time backup of
an active filesystem, they also give you a really simple 'undo'
type functionality, so you can unwind accidental deletions and
other user mistakes.
2) ZFS import and export -- again, exploiting the snap-shotting
capability, this makes it pretty easy to create a duplicate of
your filesystem onto another host, and to update the duplicate in
a very efficient way.
Cheers,
Matthew
[*] As a number of companies found out to their cost, 'in the basement
of the other tower' was not sufficiently off-site to be effective.
I recently just converted my system from raid0 to raid1, using zfs, and
because of mountpoints and other quirks you could end up having trouble
with zfs send and receive. If you're planning on backing up the whole
pool, then using a backup drive, and virtualbox with the disk image on
the backup drive to backup the pool might be easiest after you get
networking working. If you're not concerned about the whole pool, just
just create filesystems for what you want to save and use those. You
could just use the zfs send command and not recreate the filesystem, but
it's not recommended until if and when the data stream is standardized.
It'll work until Oracle breaks it.
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