Danny Mayer wrote: > Gerriet M. Denkmann wrote: >> On 13 Mar 2006, at 08:50, Danny Mayer wrote: >> >>> Gerriet M. Denkmann wrote: >>>> ntpd seems to require a constant internet connection (although as far >>>> as I can see this is never explicitly stated). >>>> >>>> But what about a computer, which is only occasionally (on average once a >>>> day) connected to the internet, and for a few minutes (5 minutes on >>>> average)? >>>> >>> ntpd was designed at a time that Internet access was unreliable and you >>> would be dialing the NIST number in Colorado, US, to get an accurate >>> time source. So yes, this is actually normal. >>> >>>> Can ntpd be used in this case? >>> Yes. >>> >>>> If yes, what paramters have to be set in ntp.conf? >>> Set up your server with iburst options and don't use any restrict lines. >>> in the startup line add -g which will allow it to reset you clock even >>> if the clock is way off. >>> >>>> If no, are there any programs available to handle this? >>>> >>> ntpd works fine. Just restart ntpd every time you connect as the IP >>> address of your local system will change and ntpd does not yet handle >>> dynamic address changes on the local machine. >> This is what I currently do. >> >> But the man page says: "After one hour the frequency file is created and >> the current frequency offset written to it." >> And: "It may take some hours for the frequency and offset to settle down." >> >> As the laptop is almost never connected to the internet for 1 hour, the >> drift file exists, but just contains 0.00. >> >> And so every day, when the computer connects to the internet and ntpd is >> started, the clock jumps back by 2.2 seconds. >> >> I would much prefer a more continous operation. >> > > Someone had supplied a patch to change the default drift file write > frequency to a configurable value. This sounds like just what you need > for your case. > > I'll have to look to see where that stands. > It's bug #472 but it didn't make it into RC1 for some reason. Harlan?
Danny _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
