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From: A Large Angry SCM <gitzilla@gmail.com>
To: Jakub Narebski <jnareb@gmail.com>
Cc: Junio C Hamano <gitster@pobox.com>, Jeff King <peff@peff.net>,
	Ted Ts'o <tytso@mit.edu>, Jonathan Nieder <jrnieder@gmail.com>,
	Ævar Arnfjörð Bjarmason  <avarab@gmail.com>,
	Clemens Buchacher <drizzd@aon.at>,
	git@vger.kernel.org
Subject: Re: generation numbers
Date: Thu, 07 Jul 2011 16:52:51 -0400
Message-ID: <4E161CA3.2050001@gmail.com> (raw)
In-Reply-To: <201107072231.13181.jnareb@gmail.com>

On 07/07/2011 04:31 PM, Jakub Narebski wrote:
> On Thu, 7 Jul 2011, Junio C Hamano wrote:
>> Jeff King<peff@peff.net>  writes:
>>
>>> You could "cheat" and instead of storing the sha1 of a blob object in
>>> the notes tree, use the lower 32 bits to store an actual value. I don't
>>> think that currently breaks any assumptions in the notes code, but it
>>> definitely is against the intent of it.
>>
>> I highly suspect that it would break fsck rather badly.  You may not even
>> be able to repack a repository with such a notes tree.
>
> Well, we could (ab)use file mode to mark that what would be sha1 actually
> stores fixed-width content of a file, like we do with submodules.
>
> This technique is I think quite similar in idea to filesystems storing
> contents of small files in file inode, isn't it?
>

Are the benefits really worth all these hacks?

  reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-11 19:04 [PATCH 0/4] Speed up git tag --contains Ævar Arnfjörð Bjarmason
2011-06-11 19:04 ` [PATCH 1/4] tag: speed up --contains calculation Ævar Arnfjörð Bjarmason
2011-06-11 19:04 ` [PATCH 2/4] limit "contains" traversals based on commit timestamp Ævar Arnfjörð Bjarmason
2011-06-11 19:04 ` [PATCH 3/4] default core.clockskew variable to one day Ævar Arnfjörð Bjarmason
2011-06-11 19:04 ` [PATCH 4/4] Why is "git tag --contains" so slow? Ævar Arnfjörð Bjarmason
2011-07-06  6:40 ` [PATCH 0/4] Speed up git tag --contains Jeff King
2011-07-06  6:54   ` Jeff King
2011-07-06 19:06     ` Clemens Buchacher
2011-07-06  6:56   ` Jonathan Nieder
2011-07-06  7:03     ` Jeff King
2011-07-06 14:26       ` generation numbers (was: [PATCH 0/4] Speed up git tag --contains) Jakub Narebski
2011-07-06 15:01         ` Ted Ts'o
2011-07-06 18:12           ` Jeff King
2011-07-06 18:46             ` Jakub Narebski
2011-07-07 18:59               ` Jeff King
2011-07-07 19:34                 ` generation numbers Junio C Hamano
2011-07-07 20:31                   ` Jakub Narebski
2011-07-07 20:52                     ` A Large Angry SCM [this message]
2011-07-08  0:29                       ` Junio C Hamano
2011-07-08 22:57                   ` Jeff King
2011-07-06 23:22             ` Junio C Hamano
2011-07-07 19:08               ` Jeff King
2011-07-07 20:10                 ` Jakub Narebski
2018-01-12 18:56   ` [PATCH 0/4] Speed up git tag --contains csilvers
2018-03-03  5:15     ` Jeff King
2018-03-08 23:05       ` csilvers
2018-03-12 13:45       ` Derrick Stolee
2018-03-12 23:59         ` Jeff King

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