[ntp:questions] Re: Client Clock Updates
Richard B. Gilbert
rgilbert88 at comcast.net
Thu Nov 17 20:59:44 UTC 2005
Steve Pope wrote:
>How do you control how often a client updates it local clock from the
ntpd does this automagically. It works best if you just leave it
alone. If you feel that you MUST tinker with it, you can specify
MINPOLL and MAXPOLL in the server statement. MINPOLL sets the minimum
poll interval. The default is 6 (shorthand for 2^6 or 64 seconds).
MAXPOLL sets the maximum interval, the default is 10 (2^10 or 1024
seconds. ntpd starts by using the value of MINPOLL. As the local
clock is pulled into synch, ntpd increases the interval to MAXPOLL.
ntpd will select the optimum polling interval if you allow it to.
The only circumstances I can think of in which you might need to tamper
with the defaults would be using a dial-up modem to get the time. In
this case you might want to extend the polling interval to eight or
twelve hours or even more. The accuracy of your clock will suffer but
what you save in phone bills may compensate for that.
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