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From: Taylor Blau <me@ttaylorr.com>
To: Jeff King <peff@peff.net>
Cc: git@vger.kernel.org, Junio C Hamano <gitster@pobox.com>,
	Derrick Stolee <derrickstolee@github.com>
Subject: Re: [PATCH v2] builtin/pack-objects.c: introduce `pack.extraCruftTips`
Date: Wed, 3 May 2023 17:28:45 -0400	[thread overview]
Message-ID: <ZFLSDS89y8P2+g/2@nand.local> (raw)
In-Reply-To: <20230503195906.GA1796816@coredump.intra.peff.net>

On Wed, May 03, 2023 at 03:59:06PM -0400, Jeff King wrote:
> On Tue, May 02, 2023 at 08:09:47PM -0400, Taylor Blau wrote:
>
> > However, there is no option to be able to keep around certain objects
> > that have otherwise aged out of the grace period. The only way to retain
> > those objects is:
> >
> >   - to point a reference at them, which may be undesirable or
> >     infeasible,
> >   - to track them via the reflog, which may be undesirable since the
> >     reflog's lifetime is limited to that of the reference it's tracking
> >     (and callers may want to keep those unreachable objects around for
> >     longer)
> >   - to extend the grace period, which may keep around other objects that
> >     the caller *does* want to discard,
> >   - or, to force the caller to construct the pack of objects they want
> >     to keep themselves, and then mark the pack as kept by adding a
> >     ".keep" file.
>
> OK, I understand the use case you're trying to support, and your
> approach mostly makes sense. But there are two things I was surprised by
> in the implementation:
>
>   1. Does this need to be tied to cruft packs? The same logic would
>      apply to "repack -A" which turns objects loose (of course you
>      probably don't want to do that in the long term for performance
>      reasons, but it's conceptually the same thing; see below).

I agree that you wouldn't want to do it for performance reasons, but I'm
comfortable with the asymmetry here, since this is `pack.extraCruftTips`
(emphasis on "cruft"), so it's not clear that it has to be related to
"repack -A".

Happy to change things up if you feel strongly, though.

Thanks,
Taylor

  parent reply	other threads:[~2023-05-03 21:28 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-20 17:27 [PATCH] builtin/pack-objects.c: introduce `pack.extraCruftTips` Taylor Blau
2023-04-20 18:12 ` Junio C Hamano
2023-04-20 19:30   ` Taylor Blau
2023-04-20 19:52     ` Junio C Hamano
2023-04-20 20:48       ` Taylor Blau
2023-04-21  0:10 ` Chris Torek
2023-04-21  2:14   ` Taylor Blau
2023-04-25 19:42 ` Derrick Stolee
2023-04-25 21:25   ` Taylor Blau
2023-04-26 10:52     ` Derrick Stolee
2023-05-03  0:06       ` Taylor Blau
2023-05-03  0:09 ` [PATCH v2] " Taylor Blau
2023-05-03 14:01   ` Derrick Stolee
2023-05-03 19:59   ` Jeff King
2023-05-03 21:22     ` Taylor Blau
2023-05-05 21:23       ` Jeff King
2023-05-06  0:06         ` Taylor Blau
2023-05-06  0:14           ` Taylor Blau
2023-05-03 21:28     ` Taylor Blau [this message]
2023-05-05 21:26       ` Jeff King
2023-05-05 22:13         ` Jeff King
2023-05-06  0:13           ` Taylor Blau
2023-05-06  0:20             ` Taylor Blau
2023-05-06  2:12             ` Jeff King
2023-05-03 22:05 ` [PATCH v3] " Taylor Blau
2023-05-03 23:18   ` Junio C Hamano
2023-05-03 23:42     ` Junio C Hamano
2023-05-03 23:48       ` Taylor Blau
2023-05-03 23:50       ` Taylor Blau
2023-05-05 21:39     ` Jeff King
2023-05-05 22:19   ` Jeff King

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