[ntp:questions] how long does it take ntpd to sync up

unruh unruh at wormhole.physics.ubc.ca
Sat Aug 27 17:07:28 UTC 2011


On 2011-08-27, C BlacK <rblak at non.net> wrote:
> I read somewhere that it takes an ntpd 24 hours to truly sync up to a stratum 2 master.

More like 10, and it depends on what level of accuracy your require. it
roughly halves the error every hour (assuming a 16 second poll
interval-- slower with longer polls)

>
> Is this true? 
Speed is not one of ntpd's virtues. chrony is much faster, if you are
running linux or bsd ( and because of that is also much more accurate in
general-- ie it follows the changes in clock rate caused for example by
heating due to variable useage much better) (chrony does not exist for
Windows).



>
> Thanks
>
> Chip




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