Re: [rdiff-backup-users] Interesting write-up of 'compare-by-hash'.

[Nathaniel Smith]

On Tue, Jan 27, 2004 at 06:33:57PM -0800, Ben Escoto wrote:
> Does anyone know how BitKeeper can send only the differences without
> using a compare-by-hash algorithm?  I don't see how this is possible
> unless BitKeeper has abandoned the usual edit w/arbitrary editor and
> then checkin scheme.

IIRC BitKeeper uses a "explicit mark before editing each file" scheme
(a clean checkout marks all files as read-only), and I think it keeps
a clean local copy of the source tree as well.

That paper has some problems as well, see e.g. the general critiques
at
  http://www.venge.net/monotone/docs/Hash-Integrity.html

-- Nathaniel

-- 
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