Chris Parsons <[email protected]> wrote on 04/12/2011 07:36:26
PM:
> On 13/04/2011 5:13 AM, Timothy J Massey wrote:
> To slightly expand what Les wrote: there are 4 realistic options
> (for a very loose definition of "realistic"):
>
> 1) rsync the pool.
> 2) LVM Snapshot/dd
> 3) Break a RAID array
> 4) Run two separate BackupPC servers, both backing up the same server.
>
> You missed options 5 and 6.
> 5) Run on Solaris or Opensolaris using NFS.
ZFS.
> Make regular NFS
> snapshots (cheap) and send the snapshots to a remote Solaris
> machine. NFS even allows you to send the delta's between snapshots.
This is a superset of 2, substituting ZFS for LVM. I'm not saying that
there aren't further advantages of ZFS over LVM, but it's a variation of
#2.
If that offends you, then rename #2 as "Volume/Filesystem snapshots with
dd" and put whatever snapshotting technology you want in there.
Remember, you have to get them to another machine, so ZFS or any other
snapshot by itself won't finish the job: you then need to copy them
somewhere else. This includes SAN based solutions (though in that case,
"somewhere else" might just be defined as a different storage shelf...).
> (Got lots of memory, or a ssd log device? Disable backuppc's pool
> and rely on NFS block level de-duplication instead.)
You can't disable BackupPC's pool. And if you did, you would no longer
have BackupPC. So completely irrelevant for this conversation! :)
(Besides, we're not trying to build BackupPC at the block leven here.
We're trying to slightly extend BackupPC.)
> Our current option would now be number 6 on this list. An archive host.
> 6) Archive Host. Backups run at night, during the day, backuppc
> archives itself to the archive host. Tar files of all the backups
> sit on a remote server - full remote backups of everything on the
> backuppc. An instant replacement for tape.
While archives are very valuable (and I use them for off-site protection
as well), they are not an answer to the question, which is how to
duplicate the entire *pool*. This duplicates a single *backup*, not the
pool.
So, I stick by my 4 options, with one of them possibly slightly renamed.
Timothy J. Massey
Out of the Box Solutions, Inc.
Creative IT Solutions Made Simple!
http://www.OutOfTheBoxSolutions.com
[email protected]
22108 Harper Ave.
St. Clair Shores, MI 48080
Office: (800)750-4OBS (4627)
Cell: (586)945-8796
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