Oh, and while I'm thinking of it, what are your thoughts on using ZFS' dedup
feature on a BackupPC pool? I'm aware that a goodly amount of RAM would be
required for that feature. But since BackupPC's dedup feature is file-based,
and ZFS' dedup feature is block-based, even more space could be saved;
particularly when you're backing up things like .pst files, where a large
majority of the file is the same, save a few bytes/KB/MB. Such files are
flagged by BackupPC as different.
Thanks,
--Mark
-----Original Message-----
From: Lars Tobias Skjong-Børsting [mailto:lists AT snota DOT no]
Sent: Saturday, March 02, 2013 2:28 PM
To: backuppc-users AT lists.sourceforge DOT net
Subject: Re: [BackupPC-users] BackupPC Pool synchronization?
Hi Mark,
On 3/1/13 10:37 PM, Mark Campbell wrote:
> Question, taking your model here, and applying it to my situation, how
> well would this work:
>
> BackupPC server, with a RAID1 zpool, with the third member being my
> external fireproof drive. Rather than the rotation you described,
> just leave it as is as it does its daily routine. Then, should the
> day come where I need to grab the drive and go, plugging the drive
> into a system with ZFSonLinux & BackupPC installed, could I mount this
> drive by itself?
Yes, this is no different, really. It would work very well. Just keep it in
sync, and all should be fine. You can just pull out any drive at will, without
causing any filesystem corruption. The fireproof drive can be inserted in a
different computer with ZFS support and you can run "zpool import" and then you
can mount the filesystem.
You shouldn't use USB for your external drive, though. E-SATA, Firewire or
Thunnderbolt is fine.
> I really like your idea of zfs send/receive for the remote copy. Do
> you have any tips/pointers/docs on the best way to run it in this
> scenario?
I don't mean to say RTFM, but the top results of a Google search are as good a
starting point as any:
https://www.google.com/search?q=zfs+send+receive+backup
I think this article is quite good:
http://cuddletech.com/blog/pivot/entry.php?id=984
If you have any further questions, don't hesitate to ask. :)
--
Best regards,
Lars Tobias
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