Timothy J. Massey wrote:
>
> Some time ago, someone e-mailed a script that performed a dd/netcat in
> an rsync-like manner: it hashed blocks of the disk and if they matched
> between the two sides they were not sent. If they didn't, the block was
> sent. The idea was to limit the amount of data that would be sent in a
> dd to the relative minimum amount of data that has changed.
>
> I've tried and tried to find this thing, but I just plain cannot--either
> in the list archives or anywhere else Google searches. Does anyone have
> such a script--or even know what I'm talking about?
>
> I think this might have been a home-grown script, but it would be very
> useful, given that currently the only way to effectively clone a backup
> server is dd, and dd'ing a 500GB partition is not exactly practical,
> especially when only a few gig has actually changed from the last time...
If you are willing to trade disk space for bandwidth, you could dd a
snapshot of the partition to a file locally, then rsync the file to a
remote copy. You'll need twice the space on the remote side if you use
rsync's default behavior of building a complete new copy before
replacing the old.
--
Les Mikesell
[EMAIL PROTECTED]
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