Re: [PATCH] git exproll: steps to tackle gc aggression

From: Duy Nguyen <pclouds@gmail.com>
Date: Aug 6, 2013, 12:24 UTC
Message-ID: <CACsJy8CGWJ07Uk8EBjfejdyshKB1NKk=_7VUoeyZWZgJFqCSkg@mail.gmail.com>
In-Reply-To: <1375756727-1275-1-git-send-email-artagnon@gmail.com>

On Tue, Aug 6, 2013 at 9:38 AM, Ramkumar Ramachandra <artagnon@gmail.com> wrote:

Show 6 quoted lines

> +               Garbage collect using a pseudo logarithmic packfile maintenance
> +               approach.  This approach attempts to minimize packfile churn
> +               by keeping several generations of varying sized packfiles around
> +               and only consolidating packfiles (or loose objects) which are
> +               either new packfiles, or packfiles close to the same size as
> +               another packfile.

I wonder if a simpler approach may be nearly efficient as this one: keep the largest pack out, repack the rest at fetch/push time so there are at most 2 packs at a time. Or we we could do the repack at 'gc --auto' time, but with lower pack threshold (about 10 or so). When the second pack is as big as, say half the size of the first, merge them into one at "gc --auto" time. This can be easily implemented in git-repack.sh.

-- 
Duy