[ntp:questions] ntpdate works, but ntpd doesn't (reach = 0)

Danny Mayer mayer at ntp.isc.org
Fri Feb 13 04:29:56 UTC 2009


Martin Burnicki wrote:
> Of course synchronization will be better if ntpd reaches an upstream server
> continuously, but still this is better than no synchronization at all ...
> 

No it wouldn't. That's a fallacy. ntpd already oversamples. This is all
in the algorithms but sampling at the same rate provides no benefit and
it is better off reducing the sampling frequency once it has a stable state.

> And surely this results in the question which has been discussed here
> several times: why does it takes so long for ntpd to adjust an initial tiny
> offset of a few milliseconds?
> 

It's easy to overshoot when you have that small of a change.

Danny
> Martin




More information about the questions mailing list