How is ntpd data used -
Bob Goodwin
bobgoodwin at att.net
Sat Nov 6 09:44:13 UTC 2004
I run a script that does:
service ntpd restart
ntpq -p
and get the following results which leaves me wondering, does ntpd throw
out the obviously erroneous data [*] or is it used, introducing an
error into my system clock? If I understand correctly all the times are
in milliseconds and I really don't need this degree of accuracy but
still the question remains...
Any response appreciated.
Thanks.
Bob Goodwin Zuni, Virginia
~ ./tsync
Shutting down ntpd: [ OK ]
ntpd: Synchronizing with time server: [ OK ]
Starting ntpd: [ OK ]
remote refid st t when poll reach delay offset jitter
==============================================================================
ntp-1.cns.vt.ed 198.82.247.40 2 u 4 64 1 136.663 -0.563 0.004
ntp-4.cns.vt.ed 198.82.247.164 2 u 3 64 1 136.475 1.145 0.004
ntp2.jrc.us 65.211.109.12 2 u 2 64 1 137.876 0.886 0.004
ntp1.jrc.us 129.7.1.66 2 u 1 64 1 146.858 5.665 0.004 *
~ ./tsync
Shutting down ntpd: [ OK ]
ntpd: Synchronizing with time server: [ OK ]
Starting ntpd: [ OK ]
remote refid st t when poll reach delay offset jitter
==============================================================================
ntp-1.cns.vt.ed 198.82.247.40 2 u 4 64 1 144.977 0.210 0.004
ntp-4.cns.vt.ed 198.82.247.40 2 u 3 64 1 133.952 0.362 0.004
ntp2.jrc.us 65.211.109.12 2 u 4 64 1 145.856 -3.157 0.004 *
ntp1.jrc.us 129.7.1.66 2 u 3 64 1 144.844 -2.449 0.004
~ ./tsync
Shutting down ntpd: [ OK ]
ntpd: Synchronizing with time server: [ OK ]
Starting ntpd: [ OK ]
remote refid st t when poll reach delay offset jitter
==============================================================================
ntp-1.cns.vt.ed 198.82.247.40 2 u 4 64 1 136.977 -0.412 0.004
ntp-4.cns.vt.ed 198.82.247.164 2 u 3 64 1 134.940 -0.421 0.004
ntp2.jrc.us 65.211.109.12 2 u 2 64 1 145.877 -1.745 0.004
ntp1.jrc.us 129.7.1.66 2 u 1 64 1 1226.63 -539.33 0.004 *
.
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