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Re: GPL-compatible implementation of VCDIFF (RFC3 284)


From: Simon Waters
Subject: Re: GPL-compatible implementation of VCDIFF (RFC3 284)
Date: Thu, 12 Aug 2004 22:21:30 +0100
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Florian Weimer wrote:
| Is there a GPL-compatible implementation of VCDIFF, as described in
| RFC3284?  The implementation should achieve reasonable performance,
| and it must be able to operate on data streams (so that it's possible
| to compute deltas of files of arbitrary size).

What are you trying to achieve?

As the RFC seems horribly hard way to explain - it seems to be achieving
the same as compressing the diff. Or are you purely trying to be
compatible with an existing implementation?

When diff gave up on me due to file size, I used rdiff, which is
designed to sync two bigs files with sparse differences that have got
out of sync, without copying one file to another machine. rdiff isn't as
effective at making the difference file small, but when the source files
are big the GNU diff tool dies horribly, and the "diff" options to
handle big files with sparse changes doesn't seem to help.
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