Solution Analysis LINUX NTP clock synchronization delay

Synchronization is not delayed like this, IP is false, safety


[root@machine-js-app3 ~]# ntpdate -d 80.12.64.89
11 Jun 15:14:04 ntpdate[19272]: ntpdate [email protected] Tue Jul  6 21:50:29 UTC 2010 (1)
Looking for host 80.12.64.89 and service ntp
host found : 80.12.64.89
transmit(80.12.64.89)
receive(80.12.64.89)
transmit(80.12.64.89)
receive(80.12.64.89)
transmit(80.12.64.89)
receive(80.12.64.89)
transmit(80.12.64.89)
receive(80.12.64.89)
transmit(80.12.64.89)
server 80.12.64.89, port 123
stratum 4, precision -24, leap 00, trust 000
refid [80.12.64.89], delay 0.02609, dispersion 0.00000
transmitted 4, in filter 4
reference time:    e0a8a80e.8aecd287  Mon, Jun 10 2019 17:57:34.542
originate timestamp: e0a9d33c.62d137d5  Tue, Jun 11 2019 15:14:04.386
transmit timestamp:  e0a9d33c.627cb6d2  Tue, Jun 11 2019 15:14:04.384
filter delay:  0.02612  0.02611  0.02609  0.02611 
         0.00000  0.00000  0.00000  0.00000 
filter offset: 0.001024 0.001015 0.001019 0.001006
         0.000000 0.000000 0.000000 0.000000
delay 0.02609, dispersion 0.00000
offset 0.001019
11 Jun 15:14:04 ntpdate[19272]: adjust time server 80.12.64.89 offset 0.001019 sec



[root@machine-app1 ~]# ntpdate -d 8012.64.89
11 Jun 15:13:31 ntpdate[9551]: ntpdate [email protected] Tue Jul  6 21:50:29 UTC 2010 (1)
Looking for host 80.12.64.89 and service ntp
host found : 80.12.64.89
transmit(80.12.64.89)
receive(80.12.64.89)
transmit(80.12.64.89)
receive(80.12.64.89)
transmit(80.12.64.89)
receive(80.12.64.89)
transmit(80.12.64.89)
receive(80.12.64.89)
transmit(80.12.64.89)
server 80.12.64.89, port 123
stratum 4, precision -24, leap 00, trust 000
refid [80.12.64.89], delay 0.02605, dispersion 0.00003
transmitted 4, in filter 4
reference time:    e0a8a80e.8aecd287  Mon, Jun 10 2019 17:57:34.542
originate timestamp: e0a9d32c.bbd9260e  Tue, Jun 11 2019 15:13:48.733
transmit timestamp:  e0a9d31b.f298274b  Tue, Jun 11 2019 15:13:31.947
filter delay:  0.02609  0.02605  0.02608  0.02608 
         0.00000  0.00000  0.00000  0.00000 
filter offset: 16.78571 16.78577 16.78582 16.78588
         0.000000 0.000000 0.000000 0.000000
delay 0.02605, dispersion 0.00003
offset 16.785772
11 Jun 15:13:31 ntpdate[9551]: step time server 80.12.64.89 offset 16.785772 sec

Delay 16s


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Origin blog.51cto.com/sf1314/2407449