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RE: branching question.

From: Robert Hunter <robert.hunter_at_gen-i.co.nz>
Date: 2005-03-09 23:28:38 CET

John Harrold wrote:
> I'm thinking about using subversion to manage documents and other stuff at
> work. I want to take advantage of it's branching abilities, but I'm not
> how branches are handled. Based on the book:
> http://svnbook.red-bean.com/en/1.0/svn-book.html#svn-ch-4-sect-1
> It seems that when a branch is created, a new "copy" is created. In
> the subversion database, are two separate "copies" stored or are future
> revisions of the branch just stored as diffs from the version present
> when the branch was created. The latter seems to be the most logical and
> efficient. However, the documentation seems to indicate that a separate
> copy is stored. This may be addressed in the documentation, and I may
> have missed it.

It's there, in a sidebar entitled "Cheap Copies".

In short: Yes, the database only stores the differences rather than
entire byte-for-byte copies. Don't worry about space.

(by the way, the link you used above relates to the book
for the older 1.0 release of Subversion. If you're considering
a new Subversion system, then by all means use the more recent
1.1 version. In addition to the bugfixes, you get some nice
features like the new flat filesystem back-end, FSFS.)

Robert Hunter
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Received on Wed Mar 9 23:31:55 2005

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