[ntp:questions] Stabilizing the drift file?

Richard B. Gilbert rgilbert88 at comcast.net
Wed Nov 22 15:02:00 UTC 2006

Robert Wachinger wrote:
> Hi,
> did anybody else have the problem, to have to stabilize the frequency discipline
> faster than the normal 15 minutes to hours? Does any solution exist?
> We have here the requirement to have a replaced board (a fresh one from the factory,
> where a correct content of the drift file is unknown) up after 5 minutes in a cluster,
> which also means, that its time does not stray more than 10ms (within the cluster).
> Any tips?
> We tried here to "play" with minpoll, burst, initial drift files (value 0).
> Regards, Robert

Use "iburst" on all your server statements in ntp.conf.  Be sure to use 
-q as an option when you start ntpd.  This may not be enough but there 
is not much more you can do.  A very good server or several very good 
servers may also help.  The goodness of a server is strongly dependent 
on the quality of the network path between the server and your client.

Is it possible to run this new board standalone before joining the 
cluster?  If so, that could get you a valid drift file.

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