On Mon, Oct 24, 2011 at 11:21:26PM -0500, Les Mikesell wrote:
> On Mon, Oct 24, 2011 at 10:19 PM, Steve M. Robbins <steve AT sumost DOT ca>
> wrote:
> >
> > I know many people have discussed how to achive an offsite archive of
> > backuppc pool. During a discussion last February [1], Timothy Massey [2]
> > and Jeffrey Kosowsky [3] summarized the options as follows:
> >
> > 1) Run two BackupPC servers and have both back up the hosts
> > directly. No replication at all: it just works.
> > 2) Use some sort of block-based method of replicating the data
> > 3) Scripts that understand the special structure of the pool and pc
> > trees and efficiently create lists of all hard links in pc directory.
> >
> > I'll be replicating over a thin residential ISP connection (rules out
> > option #1)
>
> Unless you have several hosts that hold duplicate data, after you get
> the initial fulls option #1 with rysnc transport over ssh or a vpn
> with compression enabled won't be moving more data than other ways you
> might attempt it.
At the risk of exposing my ignorance of BackupPC internals, I don't see
how this is possible. For a full back-up, isn't it true that all the
files are transferred to the backup host, then compared to the pool?
One host of mine has 1.4M files totalling 550 GB, but the last full
backup recorded 1400 new files totalling 57GB. Thus option #1 would
transfer all 550 GB, whereas my proposal would transfer a tenth of
that. No?
-Steve
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