From: Duy Nguyen <pclouds@gmail.com>
Date: Tue, 29 Jan 2013 11:01:38 GMT
Subject: Re: [PATCH 0/2] optimizing pack access on "read only" fetch repos
Message-ID: <CACsJy8AHEyQ5-qz9auB3vT_Esmos2t-cRhtvf3zbVJDMFRET_A@mail.gmail.com>
In-Reply-To: <7vlibfxhit.fsf@alter.siamese.dyndns.org>

On Sun, Jan 27, 2013 at 1:32 PM, Junio C Hamano <gitster@pobox.com> wrote:
> I also wonder if we would be helped by another "repack" mode that
> coalesces small packs into a single one with minimum overhead, and
> run that often from "gc --auto", so that we do not end up having to
> have 50 packfiles.
>
> When we have 2 or more small and young packs, we could:
>
>  - iterate over idx files for these packs to enumerate the objects
>    to be packed, replacing read_object_list_from_stdin() step;
>
>  - always choose to copy the data we have in these existing packs,
>    instead of doing a full prepare_pack(); and
>
>  - use the order the objects appear in the original packs, bypassing
>    compute_write_order().

Isn't it easier and cheaper to create the "master index", something
like bup does?
-- 
Duy