Re: git branch performance problem?

From: J. Bruce Fields <bfields@fieldses.org>
Date: Oct 10, 2007, 21:39 UTC
Message-ID: <20071010213925.GB2963@fieldses.org>
In-Reply-To: <f329bf540710101430i63926b25q7d55976af96b891d@mail.gmail.com>

On Wed, Oct 10, 2007 at 06:30:02PM -0300, Han-Wen Nienhuys wrote:

Show 35 quoted lines

> 2007/10/10, Han-Wen Nienhuys <hanwenn@gmail.com>:
> > More to the point, I seemed to have lost my entire repository. This is
> > the type of surprise  I don't enjoy.
> >
> > Now, can someone explain why 'git branch' takes forever if there are
> > only two non-remote branches ?
> 
> So,
> 
> Here is a question:  I would like to share commitishes between two checkouts
> of a repository. The reason for this is that I want to easily cherry
> pick back and forth between the two. The files of in one of them
> should be continually available, since I am running out of that
> directory.
> 
> The way I solved that, was to have both repositories pointing to each
> other, using alternates.
> 
> Now, after a couple of gc and pack-refs iterations, I am greeted by
> 
> hanwen@lilypond:~/vc/git6$ git fsck
> missing tree 12b00ec3190f7b46a5fe0a3235445bead4c9645b
> broken link from    tree 1718d09e0394d113c162e4a3471e7a1f20914a94
>               to    blob 635e2802568b85017007698c0e6dd4d28dca496f
> broken link from    tree 926899798fce75038e24f8fa1838f6da8bcf105f
>               to    tree f1b852d270ebbaaf95d8ddc06c52763bad11ff25
> missing blob 99f0c0d63276fce444e3a200167b636236784c52
> missing tree f1b852d270ebbaaf95d8ddc06c52763bad11ff25
> missing blob 236962a87fafae8ca2dce2dc550d344aa7a8884a
> missing blob 7d69ca297f392a954c4cdcb62bb4c8a90ddb862b
> missing blob 9e39be8f5cb4eeff97fcfd6eb77fefeda02f0e71
> dangling blob f3a93f023080ce9fc6becb397e366cc4ceb192f5
> 
> 
> could it be that GC does not handle cyclic alternates correctly?

Does it handle alternates at all? If you run git-gc on a repository which other repositories get objects from, then my impression was that bad things happen.

--b.