From: Jeff King <peff@peff.net>
To: Alexander Miseler <alexander@miseler.de>
Cc: Pete Wyckoff <pw@padd.com>,
git@vger.kernel.org, emontellese@gmail.com, schacon@gmail.com,
joey@kitenet.net
Subject: Re: Fwd: Git and Large Binaries: A Proposed Solution
Date: Thu, 10 Mar 2011 17:24:43 -0500 [thread overview]
Message-ID: <20110310222443.GC15828@sigill.intra.peff.net> (raw)
In-Reply-To: <4D793C7D.1000502@miseler.de>
On Thu, Mar 10, 2011 at 10:02:53PM +0100, Alexander Miseler wrote:
> I've been debating whether to resurrect this thread, but since it has
> been referenced by the SoC2011Ideas wiki article I will just go ahead.
> I've spent a few hours trying to make this work to make git with big
> files usable under Windows.
>
> > Just a quick aside. Since (a2b665d, 2011-01-05) you can provide
> > the filename as an argument to the filter script:
> >
> > git config --global filter.huge.clean huge-clean %f
> >
> > then use it in place:
> >
> > $ cat >huge-clean
> > #!/bin/sh
> > f="$1"
> > echo orig file is "$f" >&2
> > sha1=`sha1sum "$f" | cut -d' ' -f1`
> > cp "$f" /tmp/big_storage/$sha1
> > rm -f "$f"
> > echo $sha1
> >
> > -- Pete
After thinking about this strategy more (the "convert big binary files
into a hash via clean/smudge filter" strategy), it feels like a hack.
That is, I don't see any reason that git can't give you the equivalent
behavior without having to resort to bolted-on scripts.
For example, with this strategy you are giving up meaningful diffs in
favor of just showing a diff of the hashes. But git _already_ can do
this for binary diffs. The problem is that git unnecessarily uses a
bunch of memory to come up with that answer because of assumptions in
the diff code. So we should be fixing those assumptions. Any place that
this smudge/clean filter solution could avoid looking at the blobs, we
should be able to do the same inside git.
Of course that leaves the storage question; Scott's git-media script has
pluggable storage that is backed by http, s3, or whatever. But again,
that is a feature that might be worth putting into git (even if it is
just a pluggable script at the object-db level).
-Peff
next prev parent reply other threads:[~2011-03-10 22:24 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AANLkTin=UySutWLS0Y7OmuvkE=T=+YB8G8aUCxLH=GKa@mail.gmail.com>
2011-01-21 18:57 ` Fwd: Git and Large Binaries: A Proposed Solution Eric Montellese
2011-01-21 21:36 ` Wesley J. Landaker
2011-01-21 22:00 ` Eric Montellese
2011-01-21 22:24 ` Jeff King
2011-01-21 23:15 ` Eric Montellese
2011-01-22 3:05 ` Sverre Rabbelier
2011-01-23 14:14 ` Pete Wyckoff
2011-01-26 3:42 ` Scott Chacon
2011-01-26 16:23 ` Eric Montellese
2011-01-26 17:42 ` Joey Hess
2011-01-26 21:40 ` Jakub Narebski
2011-03-10 21:02 ` Alexander Miseler
2011-03-10 22:24 ` Jeff King [this message]
2011-03-13 1:53 ` Eric Montellese
2011-03-13 2:52 ` Jeff King
2011-03-13 19:33 ` Alexander Miseler
2011-03-14 19:32 ` Jeff King
2011-03-16 0:35 ` Eric Montellese
2011-03-16 14:40 ` Nguyen Thai Ngoc Duy
2011-01-22 0:07 ` Joey Hess
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