Subject: Re: [PATCH] RFC: git lazy clone proof-of-concept

From: Harvey Harrison <[email-masked]>
Date: Fri, 08 Feb 2008 12:19:39 -0800

On Fri, 2008-02-08 at 14:26 -0500, Jon Smirl wrote:
> On 2/8/08, Jakub Narebski <[email-masked]> wrote:
> > Jan Holesovsky <[email-masked]> writes:
> > One of the reasons why 'lazy clone' was not implemented was the fact
> > that by using large enough window, and larger than default delta
> > length you can repack "archive pack" (and keep it from trying to
> > repack using .keep files, see git-config(1)) much tighter than with
> > default (time and CPU conserving) options, and much, much tighter than
> > pack which is result of fast-import driven import.
> >
> > Both Mozilla import, and GCC import were packed below 0.5 GB. Warning:
> > you would need machine with large amount of memory to repack it
> > tightly in sensible time!
> 
> A lot of memory is 2-4GB. Without this much memory you will trigger
> swapping and the pack process will finish in about a month. 

Well, my modest little Celeron M laptop w/ 1GB of ram did the full
repack overnight on the gcc repo, so a month is a bit of an
exaggeration.

Cheers,

Harvey