Re: Creating objects manually and repack

From: Junio C Hamano <junkio@cox.net>
Date: Aug 4, 2006, 18:24 UTC
Message-ID: <7v64h8l5om.fsf@assigned-by-dhcp.cox.net>
In-Reply-To: <Pine.LNX.4.64.0608041052030.5167@g5.osdl.org>

Linus Torvalds <torvalds@osdl.org> writes:

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> On Fri, 4 Aug 2006, Linus Torvalds wrote:
>> 
>> You may definitely want to pack the pack-files together every once in a 
>> while. Doing so is not that hard: just list all the objects in all the 
>> pack-files you want to merge, which in turn is trivial from reading the 
>> index of the pack-files (and then you do want to do the filename, 
>> although you can just use the pack-file name if you want to).

That would only work *once*, because the resulting pack would now have blobs from two or more different files and you cannot tell them apart. So in order to collapse 110k packs into one, you would pack packs into one every 330 packs, create trees and commits for connectivity, and run the final repack -a -d over the result, or something like that, I suppose...

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> Btw, that index format is actually documented (and it really is _very_ 
> simple) in Documentation/technical/pack-format.txt.
>
> To get a list of all object names in a pack-file, you'd basically do just
> something like the appended.

git-show-index?