NTS and ipv6

Gary E. Miller gem at rellim.com
Thu Jul 25 20:06:48 UTC 2019

Yo Paul!

On Thu, 25 Jul 2019 12:46:45 -0700
Paul Theodoropoulos <paul at anastrophe.com> wrote:

> refclock shm unit 1 refid PPS minpoll 1 maxpoll 4 flag4 1 prefer
> refclock shm unit 0 refid GPS minpoll 1 maxpoll 4 flag4 1 noselect

I used to that, but it has bad effects on startup.

ntpd tends to add servers and refclocks in the order found in the
ntp.conf.  SHM1 is prolly your best source, so good to have at the

SHM0 is probably your worst source, but it will be the second one added.
It will likely differ a lot from SHM1, thus prevent them both from
being used until more servers are added so the clusters can be

Put the SHM0 last, and your ntpd will converge faaster on startup.

So best to rank your sources, in order from best to worst in the file.

If you care about startup speed.  Others say never restart...

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin
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