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From: Kilgallen@SpamCop.net (Larry Kilgallen)
Newsgroups: comp.lang.ada
Subject: Re: Quality systems (Was: Using Ada for device drivers? (Was: the
  Ada mandate, and why it collapsed and died))
Date: 22 May 2003 07:52:41 -0500
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In article <baidl0$267i$1@ID-175126.news.dfncis.de>, Vinzent Hoefler <ada.rocks@jlfencey.com> writes:
> Marin David Condic wrote:
> 
>> It may have been possible to
>>kill it, but if it could stay up and running for months on end and not
>>crash under a large variety of uses, this ought to be good enough for a
>>large variety of users.
> 
> Well, I can exactly tell you when we had a power outage the last time:
> 
> |1:46pm  up 209 days,  4:22,  1 user,  load average: 2.00, 2.00, 2.03
> 
> Is that "good enough" already?

Certainly not, even though that uptime and failure reason match my own.
I always figure my failure to provide a UPS is my own problem, but
there are some whose needs are more critical.

The record I know of without a reboot is about 16 years, for the Irish
Railway.  When they finally brought the machine down, it was running a
_very_ old version of the operating system.

But that machine did not have a wide variety of usages, and the OS was
old enough that some of those user-provoked crashes we know from history
were likely still present.

But we are concerned about the defects that have _not_ yet been fixed
in contemporary releases of the operating system.