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

Per Hedeland per at hedeland.org
Sat Mar 19 14:00:58 UTC 2005

In article <mailman.30.1111197488.588.questions at lists.ntp.isc.org> Brad
Knowles <brad at stop.mail-abuse.org> writes:
>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.

The intervals relevant for the clock selection algorithm are per server.
See e.g. "Clock select principles" on page 9 of the "NTP Architecture,
Protocol and Algorithms" document available at
http://www.eecis.udel.edu/~mills/ntp.html .

--Per Hedeland
per at hedeland.org

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