State Remote Refid Stratum Type When Poll Reach Delay Offset Jitter # 156.144.102.1 156.144.104.1 4 Unicast server 555 1024 377 23.192 1.465 1.760 + 156.144.106.1 156.144.104.1 4 Unicast server 751 1024 377 29.431 0.030 1.339 + 156.144.109.1 156.144.104.1 4 Unicast server 583 1024 377 22.822 -0.005 1.796 # 156.144.110.1 156.144.104.1 4 Unicast server 701 1024 377 22.546 0.855 0.908 + 156.144.112.1 156.144.104.1 4 Unicast server 699 1024 377 22.950 0.070 1.015 # 156.144.120.1 156.144.104.1 4 Unicast server 646 1024 377 22.829 2.164 1.991 # 156.144.121.1 156.144.104.1 4 Unicast server 547 1024 377 24.809 -0.417 0.742 + 156.144.122.1 156.144.104.1 4 Unicast server 359 1024 377 22.891 0.153 1.089 + 156.144.123.1 156.144.104.1 4 Unicast server 388 1024 377 23.672 -0.448 1.056 + 156.144.124.1 156.144.104.1 4 Unicast server 306 1024 377 37.218 -7.239 7.356 # 156.144.125.1 156.144.104.1 4 Unicast server 91 1024 377 22.781 0.236 1.016 * 156.144.126.1 156.144.104.1 4 Unicast server 453 1024 377 22.692 0.357 0.525 # 156.144.129.1 156.144.104.1 4 Unicast server 595 1024 377 23.330 1.231 1.114 + 156.144.131.1 156.144.104.1 4 Unicast server 881 1024 377 23.196 0.637 0.763 + 156.144.134.1 156.144.104.1 4 Unicast server 617 1024 377 23.003 0.057 0.668
Why is 156.144.124.1 selected for clustering? It has the the highest delay and the highest jitter; it is not needed to synch the clock, as you can see I have plenty of candidates to choose from. -----Original Message----- From: questions-bounces+edward.mischanko=arcelormittal....@lists.ntp.org [mailto:[email protected] rg] On Behalf Of David Woolley Sent: Sunday, June 26, 2011 4:04 AM To: [email protected] Subject: Re: [ntp:questions] Selection and Clustering of candidates Mischanko, Edward T wrote: > Some of the servers > NTP selects have offsets that are higher than the majority; These might be the ones with the most correct time. A high offset only indicates a poor time if you are certain that the local time is absolutely correct. > Why are they being selected? Because they have times that are consistent with the times from all the other selected ones and NTP_MAXCLOCKS in ntpd.h hasn't been reached. > Why are so many being selected when I really want the best 5 or 6. How is ntpd to determine that they are the best ones. A high offset may simply mean the local time is wrong. > > # Miscellaneous stuff > tinker allan 7 > tos minclock 4 minsane 3 It is tos maxclock, but it doesn't seem to be documented in at least some versions of the HTML. _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
