collecting the differences between a local host and remote archive to third local location (a usb device)

[Justin T Pryzby]

You can use rsync --write-batch (and write-batch-only).

Justin

On Thu, Oct 11, 2012 at 02:33:22PM -0700, Dan Stromberg wrote:
> I wonder if rdiff would do this nicely...?
> http://librsync.sourcefrog.net/doc/rdiff.html
> 
> On Thu, Sep 27, 2012 at 12:33 AM, Benjamin Ward <ben at forward.net.au> wrote:
> 
> >
> > Hi everyone,
> >
> > I'm trying to archive to a remote host but the size of the data to copy is
> > prohibitively large to consider doing the sync over the wire (it's TBs of
> > raw video), so i was wondering if it was possible to use a usb attached
> > storage device as the transport medium.
> >
> > Is it possible for rsync to compare the two systems (over the network)
> > finding any newer or different files on the local system as compared to the
> > remote archive (ignoring local deletes), then copy only those
> > new/differences to a locally attached portable drive so that the portable
> > drive can be physically taken across town to the other system, plugged in
> > and then the new data be ingested so that a subsequent rsync between the
> > the two systems would see those files as synchronised?
> >
> > I thought the --compare-dest option might be the way to go, as per this
> > post:
> >
> > http://lists.samba.org/archive/rsync/2006-June/015827.html
> >
> > but it seems to not behave the way i thought it would.
> >
> > Thanks in advance, and apologies if I'm asking a bleeding obvious
> > question. :)
> >
> > Kind regards,
> > Ben
> >

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