Bottom quoting out of character:
I believe that this refers to the following article, in which the writer
wants the "best" (by which he means something like lowest offset) 6 out
of 15 servers to contribute to the final time correction.
I may have been responsible for wrongly suggesting maxclock, but not
having it documented doesn't help in that respect.
> Subject: Selection and Clustering of candidates
Mischanko, Edward T wrote:
I choose to poll 15 servers on my network for time synchronization. NTP
is selecting over 10 servers and clustering them. Some of the servers
NTP selects have offsets that are higher than the majority; in other
words, they do not have the correct time. Why are they being selected?
Why are so many being selected when I really want the best 5 or 6.
# Miscellaneous stuff
tinker allan 7
tos minclock 4 minsane 3
#
driftfile "C:\Program Files\NTP\etc\ntp.drift"
#
enable stats
statsdir "C:\Program Files\NTP\etc\" # directory for statistics
files
statistics loopstats
filegen loopstats file loopstats type day link enable
#
# Need to set up time sources...
#
#
server 000.000.102.1 minpoll 4 maxpoll 10
server 000.000.106.1 minpoll 4 maxpoll 10
server 000.000.109.1 minpoll 4 maxpoll 10
server 000.000.110.1 minpoll 4 maxpoll 10
server 000.000.112.1 minpoll 4 maxpoll 10
server 000.000.120.1 minpoll 4 maxpoll 10
server 000.000.121.1 minpoll 4 maxpoll 10
server 000.000.122.1 minpoll 4 maxpoll 10
server 000.000.123.1 minpoll 4 maxpoll 10
server 000.000.124.1 minpoll 4 maxpoll 10
server 000.000.125.1 minpoll 4 maxpoll 10
server 000.000.126.1 minpoll 4 maxpoll 10
server 000.000.129.1 minpoll 4 maxpoll 10
server 000.000.131.1 minpoll 4 maxpoll 10
server 000.000.134.1 minpoll 4 maxpoll 10
David L. Mills wrote:
Steve,
There is something wrong with the nomenclature in your message. By
definition, the number of survivors is the number remaining after the
cluster algorithm has completedd. This number is three by default, but
can be changed using the minclock option. To reduce the numb er of
survivors below three is generally a bad idea, but as I said, the option
is available.
I don't understand what you mean by "it doesn't work". The maxclock
option does not do what you want. It is intended for automatic
configuration, where it specifies the maximum number of servers
remaining after the preempt phase. For configured associations, this
number is irrelevant.
Dave
Steve Kostecke wrote:
On 2011-07-02, David L. Mills <mi...@udel.edu> wrote:
The combine algorithm operates on the survivors of the cluster
algorithm, as described on the "How NTP Works" page. The number of
survivors can be set using the minclock option. I'm not sure why you
want to do this, but the option is there.
Dave,
I've been having a discussion with someone who wishes to configure a
large number of unicast time servers and restrict the number of
survivors to a number below the default. He was attempting to accomplish
this using maxclock option, but it did not work.
Thanks,
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