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Date:      Wed, 26 Dec 2001 14:37:16 -0600
From:      Christopher Schulte <schulte+freebsd@nospam.schulte.org>
To:        "Mike Meyer" <mwm-sender-77771d@mired.org>, Christopher Schulte <schulte+freebsd@nospam.schulte.org>
Cc:        cjclark@alum.mit.edu, Brian Behlendorf <brian@hyperreal.org>, stable@FreeBSD.ORG
Subject:   Re: make buildkernel fails on behalf of config version
Message-ID:  <5.1.0.14.0.20011226142742.03c2fde0@pop3s.schulte.org>
In-Reply-To: <15402.12857.406331.699967@guru.mired.org>
References:  <5.1.0.14.0.20011226135014.03758008@pop3s.schulte.org> <20011226105454.Y92442-100000@localhost> <20011225153309.C136@gohan.cjclark.org> <5.1.0.14.0.20011226135014.03758008@pop3s.schulte.org>

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At 02:25 PM 12/26/2001 -0600, Mike Meyer wrote:
>Given a reasonable processor, it's not "many hours", it's more like 15
>minutes even with "best practice" methods. That's because you can do
>the timeconsuming parts of the process with the machine still in
>service.

Not always practical.

If my production server allows interactive login of non-trusted users, 
(shell server for example) I cannot allow these users to have access while 
building of world happens.

I must

1) kill user processes
2) disable remote user login
3) update source
4) build
5) install (install kernel && boot single-user && install world)
6) reboot
7) allow access again

Even on fast CPU and disk this can take hours.

This is a relatively rare (IMHO) circumstance and was included for 
completeness of the thread.

Bottom line is still that kernel and world should be in sync. :)

>         <mike
>--
>Mike Meyer <mwm@mired.org>                      http://www.mired.org/home/mwm/
>Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.

--c


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