[ntp:questions] Re: Sufficient # servers to sync to

Brad Knowles brad at stop.mail-abuse.org
Sat Mar 19 01:56:19 UTC 2005

At 5:21 PM -0800 2005-03-18, David Schwartz wrote:

>      A machine reports a time of X and it reports its own accuracy as Y and
>  the round trip time is Z. Why does this one machine not define an interval
>  X+Y+Z to X-Y-Z?

	Because we're talking about intervals between servers.

>      I don't see why. Common sense say that if you have three servers and
>  they report:
>  10:11
>  10:11
>  12:03

	When it comes to the Byzantine agreement algorithms, things 
rarely make sense when you're talking about degenerate cases.

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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