Re: Figured out how to get Mozilla into git

From: Linus Torvalds <torvalds@osdl.org>
Date: Jun 9, 2006, 20:40 UTC
Message-ID: <Pine.LNX.4.64.0606091331170.5498@g5.osdl.org>
In-Reply-To: <9e4733910606091317p26d66579mdf93db293f93fb50@mail.gmail.com>

On Fri, 9 Jun 2006, Jon Smirl wrote:

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>
> > Git is much better at packing than either CVS or SVN. Get used to it ;)
> 
> The git tree that Martin got from cvsps is much smaller that the git
> tree I got from going to svn then to git.  I don't why the trees are
> 700KB different, it may be different amounts of packing, or one of the
> conversion tools is losing something.

.. or one of them is adding something.

For example, it may well be that cvs2svn does a lot more commits or something like that.

That said, I don't even see where git-svn packs anythign at all, and you're absolutely right that when/how you repack can make a huge difference to disk usage, much more so than any importer details.

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> > Do you have all the cvsps patches? There's a few important ones floating
> > around, and David Mansfield never did a 2.2 release..
> 
> I am running cvsps-2.1-3.fc5 so I may be wasting my time. Error out is
> 535MB now.
> He sent me some git patches, but none for cvsps.

I've got a couple, but I was hoping David would do a cvsps-2.2. I have this dim memory of him saying he had done some other improvements too.

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> I haven't come up with anything that is likely to result in Mozilla
> switching over to git. Right now it takes three days to convert the
> tree. The tree will have to be run in parallel for a while to convince
> everyone to switch. I don't have a solution to keeping it in sync in
> near real time (commits would still go to CVS). Most Mozilla
> developers are interested but the infrastructure needs some help.

Sure. That said, I pretty much guarantee that the size issues will be much much worse for any other distributed SCM.

If Mozilla doesn't need the distributed thing, then SVN is probably the best choice. It's still a total piece of crap, but hey, if crap (== centralized) is what people are used to, a few billion flies can't be wrong ;)

If you got your import done, is there some place I can rsync it from, and at least I can make sure that everything works fine for a repo that size.. One day the Mozilla people will notice that they really _really_ want the distribution, and they'll figure out quickly enough that SVK doesn't cut it, I suspect.

		Linus