On 6/10/11 3:18 PM, Gabriele Bulfon wrote:
> I understand this may sound a bit wary, but: what are the benefits of using
> Bacula on a ZFS storage
> rather than using Amanda or ZFS send bare utilities?
>
> I know Bacula supports ZFS acls, but we also understand the faster option of
> zfs sending.
> We also know zfs sending is not optimal for single file data recovery.
>
> So, what is the status of Bacula with ZFS snapshots? How it compares to other
> solutions?
ZFS is a peculiar animal. I don't mean that in a disparaging way, I love it.
But it may require
rethinking backup.
As you say, ZFS send/receive doesn't provide for single file recovery. However,
ZFS snapshots do.
Using rolling ZFS snapshots takes very little space, even when kept over a long
span of time. When
I've asked the question you are asking in a couple of different forums, I've
been told, use ZFS
snapshots for single file recovery and use send/receive for protection against
major failures.
Being a backup nut, I still feel I need a traditional backup system with a long
cycle of tapes. In
one case I have a multi-TB raidz2 array with a couple of years of daily
snapshots, but still do
traditional backups. I should clean out the snapshots, but space hasn't become
an issue yet.
One hangup I ran into recently was with a sort of hierarchical backup approach.
Workstations doing
rsync style rolling snapshots to the server, so the backup space on the server
is loaded with huge
numbers of hard links. On the server side, gnu tar chokes on all that. ZFS
send/receive doesn't give
me the individual file recovery. But ufsdump handles the situation nicely, so
maybe that drive gets
reverted from ZFS back to ufs, at least until the ZFS tools evolve some more.
Amanda, by the way, will work with any of those, but doesn't, in and of itself,
have anything to do
with acls. You choose the appropriate underlying native tool and plug it in.
--
---------------
Chris Hoogendyk
-
O__ ---- Systems Administrator
c/ /'_ --- Biology& Geology Departments
(*) \(*) -- 140 Morrill Science Center
~~~~~~~~~~ - University of Massachusetts, Amherst
<hoogendyk AT bio.umass DOT edu>
---------------
Erdös 4
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