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SubjectRe: MTBF data for linux
On Fri, 1 Sep 2000, Jim Garlick wrote:
> Can someone point me to MTBF data for Linux? I realize this is kind of
> vague. Ideally I would like MTBF for kernel 2.2.14 running on SMP Alpha,
> but any data is better than nothing. This is to help win an argument to
> put linux on a large cluster. Thanks in advance.

Thanks for all the replies so far (public and private). Just to clarify:
the argument is Compaq Tru64 vs linux for a large (~1000 node) cluster of
alphas. NT is not in the running, so old ammo from the desktop wars
won't help here.

What I'm looking for is someone who is running a large number of nodes and
has gathered statistics reflecting the average number of system crashes over
time. Obviously this depends on hardware, workload, power, etc.; however
a good MTBF for any cluster of linux systems would help build a little
confidence.

Simply pointing to the many large HPC linux clusters in use all over the
world, or even at other U.S. energy labs apparently isn't convincing enough.

Thanks again,

Jim

On Fri, 1 Sep 2000, Matthew Dharm wrote:

> I agree that the MTBF can be very misleading...
>
> But put it this way: My server ran 2.2.14 for over 400 days before I
> rebooted it. It was down for about 5 minutes while rebooting (probably
> less).
>
> My NT Server gets a nightly reboot. I can't get it to run for more than a
> week without it developing _some_ problem.
>
> Mind you, on both of these systems, nobody is doing any development/kernel
> hacking/anything. They're just mail/www/ftp/dns/login (for linux) servers.
> To a first order approximation, they're basically the same hardware, both
> protected by a UPS.
>
> Matt
>
> On Fri, Sep 01, 2000 at 10:38:54PM +0200, Igmar Palsenberg wrote:
> > On Fri, 1 Sep 2000, Jim Garlick wrote:
> >
> >
> > MTBF is something that says shit. depends on hardware, what the machine
> > does, if it has a UPS, etc, etc, etc, etc.
> >
> > This machine is running 2 years without problems.
> >
> > > Jim Garlick
> >
> >
> > Igmar
> >
> > -
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>

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