[ntp:questions] Speed of ntp convergence

David J Taylor david-taylor at blueyonder.neither-this-part.nor-this-bit.co.uk
Sun Nov 2 06:57:27 UTC 2008

Unruh wrote:
> So how long does it take your system to correct a bad drift file?

Oh, much longer, but that just suggests that your drift file is bad, not 
any inherent fault in NTP.

>>> Note, if you are running gps, why have a poll level 6? The
>>> recommendation
>>> for ref- clocks is poll level 4?
>> Probably because the system is also polling Internet servers, and I
>> didn't want to hammer them at 16 second intervals.  It seems that
>> the Internet poll interval /must/ be the same as the ref-clock poll
>> interval, and that it doesn't automatically adjust upwards (which
>> would be nice).
> No, each source has its own poll interval. They do NOT need to be the
> same.

It's not what Dave Mills told me on this newsgroup, when PPS reference 
clocks are included.


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