Add SUM sysctl

[Mike Meyer]

On Sun, 17 Apr 2011 15:11:03 +0300
Daniel Braniss <danny at cs.huji.ac.il> wrote:
> when something gets too complicated, it's usualy helpful to look for other ways
> out:
> the /(root) + /usr + kernel-debuging + src is less than 1GB, so what I
> do (when diskless is not an option), I have a 2 partitions, both bootable,
> and so i ALWAYS update the non active one, then
> 1- I always have a working / in case the update screwed something
> 2- I can update without problems.

A number of people have mentioned this, but none have pointed out that
with a ZFS system, you don't even have to keep a spare partition
around to do this.

Cryx provided this script
(http://anonsvn.h3q.com/projects/freebsd-patches/browser/manageBE/manageBE)
which makes updating a FreeBSD system as simple any Unix system I've
seen.

	<mike
-- 
Mike Meyer <mwm at mired.org>		http://www.mired.org/consulting.html
Independent Software developer/SCM consultant, email for more information.

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