Re: MTBF data for linux

From: J. Dow (jdow@earthlink.net)
Date: Sat Sep 02 2000 - 01:46:44 EDT

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    From: "Chris Wedgwood" <cw@f00f.org>
    To: "Alan Cox" <alan@lxorguk.ukuu.org.uk>

    > We ran 1.2.13lmp for about 1100 days before the box finally got
    > turned off - twice around the uptime clock and more
    >
    > That's must be some kind of unofficial record... I though 400+ days
    > was pretty neat, but 1100 says is really impressive, especially on a
    > kernel which has races with jiffie wraps...

    Um, another "uptime benchmark" is the little machine (old 75MHz
    Pentium) we use here as our internal net's gateway to the internet
    via IP Masquerading. It is the machine on the net with the honorary
    unimaginative name, linux. Little linux endeared himself to me by
    reaching 450+ days uptime as a v.90 dialup and internal http server
    before I rebooted him for some upgrades. We went DSL. I needed
    to install a new NIC. I'm not adventuresome enough to hotplug a
    PCI card. So at something like 450 days, 6 hours and somewhat
    more than another half hour he was cleanly shutdown. I installed a
    new disk as hdc, a new CDROM as hdd, a new NIC, and rebooted.
    He came up clean first time. Then I partitioned and mounted the
    new disk, transferred critical files, and rebooted again to install
    RedHat 6.2 and once more to upgrade the kernel. He has a month
    of uptime at this point. (I took him down one more time to remove
    the tiny original disks he ran on and move the 2gig drive to hda
    and the CDROM to hdc after he'd been up and clean about a week
    and a half.)

    It appears Linux stays up longer than you care to leave it up. I
    admit this was with no load to speak of. But it was kinda fun to
    hold a birthday party for him at one year. (Heh, I even moved him
    across the room sitting on top of the UPS when I rearranged the
    furniture on my side of the room. hey, I'm female. I get to do silly
    things like that. {O,o})

    Er, do the True64 machines have any practical uptime problem?
    The one BIX runs on seems to accumulate some impressive
    uptime under the load the tiny number of remaining members
    place on the machine.

    {^_^}

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