[ntp:questions] Disappointing results from ntpd

Daniel Norton danorton at gmail.com
Sun Aug 10 14:57:10 UTC 2008


Any idea why I'm frequently seeing my system drift off by over 750
ms ? This system has been running ntpd for weeks without configuration
changes.  Below is from a few minutes after stuffing ntpdate down its
throat (after stopping and restarting ntpd):

# ntpdate -q
server 140.99.51.115, stratum 3, offset 0.274883, delay 0.08795
server 72.233.76.194, stratum 3, offset 0.276196, delay 0.04480
server 207.210.74.166, stratum 2, offset 0.276172, delay 0.06688
server 66.250.45.2, stratum 2, offset 0.276772, delay 0.09192
server 64.202.112.65, stratum 2, offset 0.281568, delay 0.07211
10 Aug 09:47:41 ntpdate[16596]: adjust time server 207.210.74.166
offset 0.276172 sec
# ntpd --version
ntpd - NTP daemon program - Ver. 4.2.4p4
# lsb_release -d
Description:    Ubuntu 8.04
# uname -a
Linux linux1 2.6.24-16-server #1 SMP Thu Apr 10 13:58:00 UTC 2008 i686
GNU/Linux
# cat /var/lib/ntp/ntp.drift
-7.300
# cat /etc/ntp.conf
driftfile /var/lib/ntp/ntp.drift

server 0.us.pool.ntp.org prefer minpoll 11 maxpoll 13
server 1.us.pool.ntp.org minpoll 12 maxpoll 14
server 2.us.pool.ntp.org minpoll 12 maxpoll 16
server 3.us.pool.ntp.org minpoll 12 maxpoll 17

restrict -4 default kod notrap nomodify nopeer noquery
restrict -6 default kod notrap nomodify nopeer noquery
restrict 127.0.0.1
restrict ::1




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