Date: Wed, 4 Sep 2002 12:58:54 -0700 From: "Sameer R. Manek" <manek@ecst.csuchico.edu> To: "Kevin Oberman" <oberman@es.net>, "Jack L. Stone" <jackstone@sage-one.net> Cc: "Brooks Davis" <brooks@one-eyed-alien.net>, "David W. Chapman Jr." <dwcjr@inethouston.net>, <stable@FreeBSD.ORG> Subject: RE: Updating world with least downtime Message-ID: <LMEMIKHGPPEEMMMMGIENMEDCENAA.manek@ecst.csuchico.edu> In-Reply-To: <20020830211107.8251F5D06@ptavv.es.net>
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I recently rebuilt the world on my pII 400 system, and here is how long it
took me.
/usr/bin/time make installworld
266.34 real 74.23 user 43.33 sys
/usr/bin/time make installkernel
26.11 real 6.89 user 2.38 sys
So it took about 4.8 minutes to install the files, given average consumer
grade disks. Compiling is more cpu dependant, but the install portion is
more a function of disk-io.
Mergemaster is obviously dependent on how quickly it takes the operator to
run that command. But if you budget 10 - 15 minutes, it should be good
enough.
Sameer
> -----Original Message-----
> From: owner-freebsd-stable@FreeBSD.ORG
> [mailto:owner-freebsd-stable@FreeBSD.ORG]On Behalf Of Kevin Oberman
> Sent: Friday, August 30, 2002 2:11 PM
> To: Jack L. Stone
> Cc: Brooks Davis; David W. Chapman Jr.; stable@FreeBSD.ORG
> Subject: Re: Updating world with least downtime
>
>
>
> For a modern system and a reasonable disk, this is trivial. I have a
> system which MUST not be down for over 15 minutes and I can do it
> quite easily unless I really fumble something in mergemaster. I do
> always merge a few files later and tend to install most changes very
> quickly, having ode the same upgrade on a non-critical system just
> before I do the critical one so I know what to expect.
>
> The actual installworld time on my 1GHZ system is about 5 minutes
> (5:34 last time).
>
> R. Kevin Oberman, Network Engineer
> Energy Sciences Network (ESnet)
> Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
> E-mail: oberman@es.net Phone: +1 510 486-8634
>
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