Re: [PATCH 0/4] Add git-pack-intersect

[Junio C Hamano <junkio@cox.net>]

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Lukas Sandstr^[.A^[Nvm <lukass@etek.chalmers.se> writes:

> Perhaps if git-daemon ever does caching of packfiles, removing the smaller
> packfiles might not be optimal.

Ah, that reminds me of something.

I did not advertise it too much, but you can put a prepackaged
packs in $GIT_DIR/pack-cache/ and it is used when upload-pack
notices it is creating that exact pack.

This is useless for ordinary repository, but can be useful for
historical repositories whose heads/tags never change (e.g. the
Linux kernel repository resurrected from bkcvs).  There you
could:

	$ git repack -a -d
	$ ln $GIT_DIR/objects/pack/pack-* $GIT_DIR/pack-cache/.

and a clone request would feed the pack, without regenerating
the pack data from scratch.  upload-pack still reads, sorts and
computes SHA1 hash of the list of objects to find the pack name,
but that is a fairly quick operation, compared to the rest of
the pack generation process.