[ntp:questions] Re: Sufficient # servers to sync to
brad at stop.mail-abuse.org
Sat Mar 19 00:41:33 UTC 2005
At 3:16 PM -0800 2005-03-18, David Schwartz wrote:
> The assumption is that you have three servers, two of which are working
> and one of which is not. If two of them are working, then their intervals
> *must* overlap.
They can't overlap, since it takes two machines to *define* an
interval. If you have three machines, you may have as many as two
different intervals. If one of those machines is insane, then you're
back to the well-known two-machine problem.
> Obviously if you have three servers and no two of them are
> reliable, you are screwed.
You're pretty much screwed if you have just three servers and any
one of them is unreliable.
Brad Knowles, <brad at stop.mail-abuse.org>
"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
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