[ntp:questions] Polling time backoff

shane-dated-2009 at csy.ca shane-dated-2009 at csy.ca
Sat Nov 28 23:52:34 UTC 2009


Hi,

Just wondering if there is anything in particular which would keep ntpd
polling its servers every 64s. I thought it was supposed to backoff to 1024s
eventually but this doesn't seem to be the case here.

continuum:~$ ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*GPS_NMEA(0)     .GPS.            0 l    9   16  377    0.000   -0.006   0.001
+dns1.uniserve.c 140.142.16.34    2 u   43   64  377   10.898    2.437   1.734
-dns2.uniserve.c 131.188.3.220    2 u   50   64  377    9.005   -1.581   3.804
+time.nrc.ca     132.246.168.2    2 u   24   64  377   72.240    1.565   5.935

My ntp.conf is pretty boilerplate save the following bits.
discard average 30
discard minimum 3

restrict default kod limited nomodify notrap nopeer
restrict 127.0.0.1

server 127.127.20.0 minpoll 4 prefer
fudge 127.127.20.0 flag3 1 flag2 0

The other servers are just server xxx iburst

Isn't 64s too short a polling time? ntp version is 4.2.4p6 (Debian).

Best,
Shane




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