Re: .gitlink for Summer of Code

From: Linus Torvalds <torvalds@linux-foundation.org>
To: David Lang <david.lang@digitalinsight.com>
Cc: Josef Weidendorfer <Josef.Weidendorfer@gmx.de>,
	Junio C Hamano <junkio@cox.net>,
	Martin Waitz <tali@admingilde.org>, Eric Lesh <eclesh@ucla.edu>,
	Matthieu Moy <Matthieu.Moy@imag.fr>,
	git@vger.kernel.org
Subject: Re: .gitlink for Summer of Code
Date: Tue, 27 Mar 2007 11:15:42 -0700 (PDT)	[thread overview]
Message-ID: <Pine.LNX.4.64.0703271114000.6730@woody.linux-foundation.org> (raw)
In-Reply-To: <Pine.LNX.4.63.0703270858080.15345@qynat.qvtvafvgr.pbz>

On Tue, 27 Mar 2007, David Lang wrote:

> On Tue, 27 Mar 2007, Linus Torvalds wrote:
> 
> > - walking the *global* object list is simply not possible. You need to
> >   fsck every single subtree individually, and fsck the superproject on
> >   its own, *without* recursing into the subprojects. And you need to be
> >   able to clone the superproject and only one or two subprojects, and
> >   never see it as one "atomic" big repository.
> 
> you can do a fsck to make sure that all needed objects are available on each
> project individually, but a prune/gc _does_ need to go through the global

No it doesn't.

If you do per-project object stores, there's no need. There simply isn't 
anything to prune "globally". Everything is local.

Now, if you share the object directory, you can't prune. But that's true 
even without any "subproject" support, and has nothing to do with sub- or 
super-projects.

		Linus