From: Avery Pennarun <apenwarr@gmail.com>
Date: Mon, 15 Feb 2010 19:19:48 GMT
Subject: Re: [PATCH] don't use mmap() to hash files
Message-ID: <32541b131002151119o2f528ddv147d71d12d9d11fe@mail.gmail.com>
In-Reply-To: <alpine.LFD.2.00.1002150016110.1946@xanadu.home>

On Mon, Feb 15, 2010 at 12:48 AM, Nicolas Pitre <nico@fluxnic.net> wrote:
> Ideally you don't keep volatile objects into huge packs.  That's why we
> have .keep to flag those packs that are huge and pure so not to touch
> them anymore.

Of course the problem here is that as soon as you import a single
(possibly volatile) 2GB file, your pack becomes "huge."  So these
heuristics stop working very well and start to need some revision.

Thanks for the clarification on packing and repacking.  I might be
able to use this method to come up with a better repacking/pruning
algorithm in bup, and from there to perhaps forward it on to git.

Have fun,

Avery