[ntp:questions] simple nt.conf cases for ntp-client

David Woolley david at ex.djwhome.demon.invalid
Thu Jan 23 23:09:36 UTC 2014


On 23/01/14 13:06, Marco Marongiu wrote:

>
> 3) second filter: a new value for the error that fits the majority of
> these C references is calculated; the L references that don't fit in
> this error interval are called "outlyers"; the S=C-L references that
> remain are considered;

Ones that don't fall within the the largest mutually consistent set of 
error bounds are called "false tickers", not "outlyers".
>
> 4) peer selection: among the references in S, the one that has the
> smallest dispersion is selected, and ntpd will "follow" it until the
> next evaluation of the data collected from the sources.

This is used for the figurehead peer that defines the stratum and error 
statistics.  All the ones that are valid and not outlyers or false 
tickers will be tracked for time synchronisation purposes.  (The is a 
hysteresis mechanism that means that the system peer will not change as 
often as the description implies.)




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