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From: Lars Schneider <larsxschneider@gmail.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git <git@vger.kernel.org>, Jeff King <peff@peff.net>,
	Duy Nguyen <pclouds@gmail.com>
Subject: Re: worktrees vs. alternates
Date: Wed, 16 May 2018 11:51:26 +0200	[thread overview]
Message-ID: <81B00B00-00F4-487A-9D3E-6B7514098B29@gmail.com> (raw)
In-Reply-To: <87po1waqyc.fsf@evledraar.gmail.com>


> On 16 May 2018, at 11:29, Ævar Arnfjörð Bjarmason <avarab@gmail.com> wrote:
> 
> 
> On Wed, May 16 2018, Lars Schneider wrote:
> 
>> I am looking into different options to cache Git repositories on build
>> machines. The two most promising ways seem to be git-worktree [1] and
>> git-alternates [2].
>> 
>> I wonder if you see an advantage of one over the other?
>> 
>> My impression is that git-worktree supersedes git-alternates. Would
>> that be a fair statement? If yes, would it makes sense to deprecate
>> alternates for simplification?
>> 
>> [1] https://git-scm.com/docs/git-worktree
>> [2] https://git-scm.com/docs/gitrepository-layout#gitrepository-layout-objectsinfoalternates
> 
> It's not correct that worktrees supersede alternates, or the other way
> around, they're orthagonal features.
> 
> git-worktree allows you to create a new working directory connected to
> the same local object store.
> 
> Alternates allow you to declare in any given local object store, that
> your set of objects isn't complete, and you can find the rest at some
> other location, those object stores may or may not have more than one
> worktree connected to them.

OK. I just wonder in what situation I would work with an incomplete
object store. The only use case I could imagine is that two repos share
a common set of objects (most likely blobs). However, in that situation
I would keep the two independent lines of development in a single repo
with two root commits.

Would it be fair to say that "git alternates" are a good mechanism to 
cache objects across different repos? However, I would consider a cache 
hit  between different repos unlikely. In that line of thinking
"git worktree" would be a good (maybe better?) mechanism to cache objects
for a single repo?

Thanks,
Lars

  parent reply	other threads:[~2018-05-16  9:51 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-16  8:13 worktrees vs. alternates Lars Schneider
2018-05-16  9:29 ` Ævar Arnfjörð Bjarmason
2018-05-16  9:42   ` Robert P. J. Day
2018-05-16 11:07     ` Ævar Arnfjörð Bjarmason
2018-05-16  9:51   ` Lars Schneider [this message]
2018-05-16 10:33     ` Ævar Arnfjörð Bjarmason
2018-05-16 13:02       ` Derrick Stolee
2018-05-16 14:58         ` Konstantin Ryabitsev
2018-05-16 15:34           ` Ævar Arnfjörð Bjarmason
2018-05-16 15:49             ` Konstantin Ryabitsev
2018-05-16 17:54               ` Ævar Arnfjörð Bjarmason
2018-05-16 17:14           ` Martin Fick
2018-05-16 17:41             ` Konstantin Ryabitsev
2018-05-16 18:02               ` Ævar Arnfjörð Bjarmason
2018-05-16 18:12                 ` Konstantin Ryabitsev
2018-05-16 18:26                   ` Martin Fick
2018-05-16 19:01                     ` Konstantin Ryabitsev
2018-05-16 19:03                       ` Martin Fick
2018-05-16 19:11                         ` Konstantin Ryabitsev
2018-05-16 19:18                           ` Martin Fick
2018-05-16 19:23                       ` Jeff King
2018-05-16 19:29                         ` Konstantin Ryabitsev
2018-05-16 19:37                           ` Jeff King
2018-05-16 19:40                             ` Martin Fick
2018-05-16 20:06                               ` Jeff King
2018-05-16 20:43                                 ` Martin Fick
2018-05-16 20:02                             ` Konstantin Ryabitsev
2018-05-16 20:17                               ` Jeff King
2018-05-17  0:43                               ` Sitaram Chamarty
2018-05-17  3:31                                 ` Jeff King
2018-05-19  5:45                                   ` Duy Nguyen
2018-05-16 19:14           ` Jeff King
2018-05-16 21:18             ` Stefan Beller
2018-05-16 23:45               ` Jeff King

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