Jim, I assume you are referring to this:
http://wiki.openindiana.org/oi/rsync+daemon+service+on+OpenIndiana, thanks!
My concern is that typically rsync will take quite a while to traverse a
large set of files before sending only changed files; a classic example
is backing up say 1TB of maildir emails, it may take 4+ hours, and you
now have to deal with a situation where your midnight backup is really a
"somewhere between midnight and 4am" backup. And of course, if you want
to take snapshots/backups of comstar volumes, rsync isn't quite the
right fit.
On the other hand, a zfs snapshot gives an almost-at-the-time backup
(give or take a few seconds), versus the aforementioned rsync. The zfs
snapshot can then be sent off-site, independent of the backup activity.
However, having used zetaback, warmer, as well as other zfs scripts,
what I've noticed so far is that sometimes, the snapshot send/receive
"hangs" (for want of a better word), then the other automated, scheduled
jobs then queue and "hang" behind the first (since they tend to be
incremental).
If anybody has encountered and found a solution or even a way to
troubleshoot why that particular job "hangs", I'd appreciate any feedback!
Phing
On 12/09/2012 01:47, Jim Klimov wrote:
2012-09-11 18:56, Mark Creamer wrote:
A recent thread caused me to look for open source projects that leverage
ZFS to backup systems. I found a couple, such as OmniTI's
Zetaback<http://labs.omniti.com/labs/zetaback>,
but that one appears to be dead - at least the links don't work and
the Git
page shows no recent activity. Nexenta's commercial product for Windows,
"Delorean", also appears to have been killed (unfortunately without
first
being released to the community as far as I can tell). Wondering if
anyone
knows of any other projects that use scripts or some other method to
manage
system backups with zfs. I'm hoping to build on the ideas of someone
more
knowledgeable to automate my snapshot and recovery efforts.
Regarding backup of other OSes to ZFS servers and leveraging ZFS
from there on, I can suggest rsync (or cwrsync in case of Windows
clients). This is easily automatable on clients (push to rsync
server) or on the server (pull from clients), provided that you
set up the security/logins appropriately.
The ZFS-enabled server can take care of snapshotting successful
rsync run results, deduplication if appropriately spec'ed, etc.
I posted an enhanced SMF script and config file snippets on OI
wiki to run the rsync server and take ZFS auto-snapshots after
successful completion of incoming rsync sessions (push mode);
it is even more trivial in pull mode initiated by the server -
it can "mkdir .../.zfs/snapshot/$SNAPNAME" given the proper
access via "zfs allow").
HTH,
//Jim Klimov
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