Re: [gentoo-dev] overlay support current proposal?

["Chris Bainbridge" <chris.bainbridge@gmail.com>]

On 27/03/06, Ryan Phillips <rphillips@gentoo.org> wrote:
> Aron Griffis <agriffis@gentoo.org> said:
> > Have you followed the threads in the past regarding using other
> > version control systems for portage?  Some devs have done benchmarks
> > and found that there are blocking issues with subversion, particularly
> > because of its repo-wide revisions that prevent multiple commits from
> > happening simultaneously.
>
> In actuality, Subversion does 98% of the commit in an initial
> transaction, and the blocking only occurs in the last 2% with the FSFS
> filesystem.  It really isn't an issue and shouldn't prevent us from
> adopting it.

All svn commits are atomic, and that requires some kind of global
lock. I'd say the (slight) performance penalty is worth it for that
feature alone. I'd also point out that the KDE project have everything
in a single svn repository and can manage >10,000 commits per month
with no problems. There are various testimonials around from people
claiming to be running svn on multiple GB repositories with >17,000
commits a month.

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