Alan B. Pearce wrote:

> One other question, do any of the CVS systems allow incremental backups,
> where only items changed since a last full backup would be backed up? This,
> to me anyway, would seem to be a sensible way of doing it without needing to
> spend money on a tape drive or whatever, to do a full backup each time.

Yes and no, depending on what you mean by "item".

CVS is based on RCS files. Every file in your sandbox corresponds to a file
in the repository, which contains the complete history of that file. The
file changes whenever you commit to it.

So yes, if you do incremental backups (with a backup app that supports
that, like xcopy :) you would back up only the files that changed since
last time.

But no, you would not only back up what changed, you would back up all
files that changed -- including the history parts that didn't change. (Say
you change a character in a 100k file, you'd still back up the 100k file.)

Sector-oriented incremental backups may work differently, but that's a
different story.

Gerhard

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