[ntp:questions] Bug 2341 - ntpd fails to keep up with clock drift at poll>7

Mischanko, Edward T Edward.Mischanko at arcelormittal.com
Tue Dec 3 04:16:12 UTC 2013

Yes, it is strange.  My point as a software tester, and user, is that if software doesn't work as documented or intended, the why needs to be discovered and addressed with a solution that matches documentation.


From: questions-bounces+edward.mischanko=arcelormittal.com at lists.ntp.org [questions-bounces+edward.mischanko=arcelormittal.com at lists.ntp.org] on behalf of Harlan Stenn [stenn at ntp.org]
Sent: Monday, December 02, 2013 2:10 PM
To: Brian.Inglis at SystematicSw.ab.ca
Cc: questions at lists.ntp.org
Subject: Re: [ntp:questions] Bug 2341 - ntpd fails to keep up with clock        drift at poll>7

Brian Inglis writes:

> When I ran current stable under Win 7 with only network servers I
> found I had to drop minpoll to 4 (default is 6) so iburst would
> quickly get a good offset and pull drift down from initial
> out-to-lunch estimate compared to drift file contents.

This is strange - iburst sends its polls at 2 second intervals, and with
a good drift file will sync the clock in about 11 seconds' time.

Dropping minpoll from 6 to 4 should only help if the initial conditions
are "off" enough that the initial iburst volley didn't match up with
things like the stored drift value.

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