From: Junio C Hamano <gitster@pobox.com>
Date: Mon, 11 Jun 2012 15:40:57 GMT
Subject: Re: Keeping unreachable objects in a separate pack instead of loose?
Message-ID: <7vd35597qu.fsf@alter.siamese.dyndns.org>
In-Reply-To: <E1SdhJ9-0006B1-6p@tytso-glaptop.cam.corp.google.com>

"Theodore Ts'o" <tytso@mit.edu> writes:

> Which got me thinking.... the whole point of leaving the objects loose
> is to make it easier to expire them, right?   But given how expensive it
> is to have loose objects lying around, why not:
>
> a)  Have git-pack-objects have an option which writes the unreachable
>     objects into a separate pack file, instead of kicking them loose?
>
> b)  Have git-prune delete a pack only if *all* of the objects in the
>     pack meet the expiry deadline?
>
> What would be the downsides of pursueing such a strategy?  Is it worth
> trying to implement as proof-of-concept?

I do not offhand see a downside; as a matter of fact, there has
already been the first-step change in the direction in v1.7.10.2
and newer that avoids exploading the unreachable ones into loose
object if we know they are going to be immediately pruned.