[ntp:questions] Synchronize clocks without a reference clock

Danny Mayer mayer at ntp.isc.org
Sat Mar 31 18:02:16 UTC 2007


Per Hedeland wrote:
> Well, I was mainly thinking of the case where you have orphan mode set
> up as a fallback to external servers - then the drift value that has
> been calculated while external servers were reachable is a good "quality
> indicator". But I assume the non-"masters" in an orphan-only setup
> calculate a drift relative to the "master" - in that case, if you're
> happy with the drift of the "master", you will be least unhappy if the
> host with the lowest drift relative to the departed "master" is chosen
> as the new "master".

I don't think that this follows at all. The drift is basically the
natural drift of the clock but even assuming that you have the
information on that server about the drift it gives you zero information
on how well it is able to keep time even when not being disciplined.

Danny



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