|
Re: [BackupPC-users] Block-level rsync-like hashing dd?
2011-04-12 18:53:31
"Jeffrey J. Kosowsky" <backuppc AT kosowsky DOT org>
wrote on 04/12/2011 05:20:07 PM:
> Timothy J Massey wrote at about 15:43:28 -0400 on Tuesday, April 12,
2011:
> > To slightly expand what Les wrote: there are 4 realistic
options (for a
> > very loose definition of "realistic"):
> >
> > 1) rsync the pool.
> As noted many times before, this fails and/or thrashes for large
> archives due to the humongous number of hard links
Yeah, I know. I've never made it work, either.
Other people jump up and down and claim it *can* work. What
part of "very loose definition of 'realistic'" don't you understand?
:)
> I think #4 is underappreciated given how cheap hardware is
> nowadays.
It's the only way I do redundancy with my backup servers
in production. Period.
> For the 2nd "backup" version, you can
potentially get by
> with less frequent runs say perhaps just 1 full a week. Of course,
you
> won't have as granular a series of fulls & incrementals, but since
> this is a reserve backup, you may be satisfied with that. And if not
> then once every longer period of time you can do a bit copy of your
> primary BackupPC partition if you want. I end up using a lowly 1.2GHz
> Arm CPU plug computer with just 500MB memory and 500 MB flash
plus a
> 1TB USB external drive to serve as my 2nd backup.
All of this is an excellent point and I agree with
all of it. I use VIA EPIA systems for full production: you
can't buy slower boxes. Yet they back up lots of clients. Some
people will say, "But I don't have time to do two full backups a day!"
In that case, what they're really trying to build is a "server
proxy". They then kill themselves running into all kinds of
difficulties that they simply would not have if they just used two BackupPC
servers.
And if your incremental backups truly fill up the entire backup window,
then you have problems: what happens when (not if) your dataset grows?
In other words, you've put in a crummy solution that *will* fail.
Why not fix it now instead of trying to get clever (read: stupid)
with your backups?
> AGREED - this topic has been discussed ad-nauseum on the list to date...
You might sense my frustration... :(
Timothy J. Massey
------------------------------------------------------------------------------
Forrester Wave Report - Recovery time is now measured in hours and minutes
not days. Key insights are discussed in the 2010 Forrester Wave Report as
part of an in-depth evaluation of disaster recovery service providers.
Forrester found the best-in-class provider in terms of services and vision.
Read this report now! http://p.sf.net/sfu/ibm-webcastpromo _______________________________________________
BackupPC-users mailing list
BackupPC-users AT lists.sourceforge DOT net
List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
Wiki: http://backuppc.wiki.sourceforge.net
Project: http://backuppc.sourceforge.net/
|
|
|
