[ntp:questions] Query about NTP accuracy
janspam.ceuleers at skynet.be
Sun May 24 08:27:46 UTC 2009
Terje Mathisen wrote:
> This is why you want ntpd to do the initial step, after first doing the
> full vote collection from all configured servers, not ntpdate which
> picks the first server to respond!
If that is so, then the ntpdate manpage is wrong:
ntpdate sets the local date and time by polling the Network Time Proto‐
col (NTP) server(s) given as the server arguments to determine the cor‐
rect time. It must be run as root on the local host. A number of sam‐
ples are obtained from each of the servers specified and a subset of
the NTP clock filter and selection algorithms are applied to select the
best of these.
In other words, before ntpd was capable of being a good ntpdate
replacement, best practice was to use a script to extract server lines
from ntpd.conf and pass all of those on the ntpdate command line.
More information about the questions