Date: 04 Jan 2003 05:58:13 +0000 From: Wes Peters <wes@softweyr.com> To: freebsd-stable@freebsd.org Subject: Re: FreeBSD Stability Message-ID: <1041659893.9975.179.camel@zaphod.softweyr.com> In-Reply-To: <20030103154323.GA454@laurel.tmseck.homedns.org> References: <200212170023.gBH0Nvlu000764@beast.csl.sri.com> <20030103000232.GA52181@blazingdot.com> <Pine.GSO.4.51.0301021738490.19685@xmission.xmission.com> <20030103062708.GA426@laurel.tmseck.homedns.org> <20030103084232.GA3371@localhost.bsd.net.il> <20030103154323.GA454@laurel.tmseck.homedns.org>
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On Fri, 2003-01-03 at 15:43, Thomas Seck wrote:
> * Nimrod Mesika (nimrod-me@bezeqint.net):
>
> [Uptime]
>
> > Think about compute servers. Our CAD servers can run simulations and
> > other types of processes for ~40 hours. You definitely don't want to
> > interrupt a running system and it finding some idle time for service
> > gets really difficult.
>
> Of course not. But these are probably neither publicly accessible nor
> 'monitored' by Netcraft and thus not subject to public 'uptime-size'
> wars.
>
> > Would be nice if you could upgrade subsystems one at a time. This
> > way one could, for example, shutdown the network subsystem, load
> > the new version and restart it.
>
> Sounds like what microkernels were designed for.
>
> > And uptimes are not important. Downtimes *are*.
>
> Yes. Especially the unscheduled ones.
Don't be silly, uptimes are terribly important when they're not long
enough to be useful. They're no longer important when they've gotten
long enough to last between system upgrades, which FreeBSD and a number
of other systems are regularly capable of these days.
I remember people being mightily impressed with VAX/VMS systems being
able to stay up for 30 days at a time. I also more recently recall
system administrators being very disappointed by Windows NT servers
because they couldn't stay up for 6 days at a time and they had NO time
in their schedule when the machines could be rebooted without disrupting
workflow between 0400 Monday and 0400 Saturday.
--
Where am I, and what am I doing in this handbasket?
Wes Peters wes@softweyr.com
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