Time Problem in 5.0
Dan Nelson
dnelson at allantgroup.com
Fri Apr 25 18:08:39 PDT 2003
In the last episode (Apr 25), Bill Moran said:
> Dan Nelson wrote:
> >In the last episode (Apr 25), Bill Moran said:
> >>I'm going to repeat myself here: ntpdate is depreciated. The
> >>functionality in it is duplicated by ntpd. It shouldn't even be in
> >>the 5.0 tree. I'm considering filing a pr to request that it be
> >>removed. Opinions?
> >
> >ntpdate has two nice features:
> >
> >1 - It runs in under a second. This is useful during the startup
> > sequence, so you know all of your daemons come up with the right
> > time. "ntpd -q" took 3 and 5 1/2 minutes to return my prompt on
> > tests on two different machines.
>
> That's because ntpdate is an unreliable hack of the ntp system. Read
> some of these docs on reliable time-keeping any you'll understand why
> ntpd takes so long, even with -q:
> http://www.eecis.udel.edu/~ntp/ntpfaq/NTP-a-faq.htm The use of a
> single NTP server is never considered a good idea.
During the boot process I could care less if I'm a half-second off.
I'd rather not be an hour or a day off, though. I just want ntpdate to
give me a reasonable clock for 5 minutes until ntpd gets itself
synched. An unreliable hack is perfect.
--
Dan Nelson
dnelson at allantgroup.com
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