[ntp:questions] How to measure the quality of NTP server
natalie.abravanel at kaminario.com
Tue Feb 16 13:54:49 UTC 2016
Before synching to a server, I would like to define some criteria for a good NTP source.
If I query ntp server:
ind assid status conf reach auth condition last_event cnt
1 36430 961a yes yes none sys.peer sys_peer 1
associd=0 status=0618 leap_none, sync_ntp, 1 event, no_sys_peer,
version="ntpd 4.2.6p5 at 1.2349-o Mon Jan 25 14:08:27 UTC 2016 (1)",
processor="x86_64", system="Linux/2.6.32-431.el6.x86_64", leap=00,
stratum=3, precision=-24, rootdelay=183.660, rootdisp=63.268,
reftime=da6da105.8ad1ef23 Tue, Feb 16 2016 15:22:13.542,
clock=da6da4db.d53c285b Tue, Feb 16 2016 15:38:35.832, peer=36430,
tc=10, mintc=3, offset=0.584, frequency=-17.995, sys_jitter=0.000,
* What should be decent values for : precision, rootdelay, rootdisp, frequency, sys_jitter, clk_jitter, clk_wander?
I don't want to start syncing with in accurate source (and I have limitations to sync only to one server, which usually as I understand is less recomanded)
I am trying to find some benchmarks for a good quality ntp server.
* The association rv=0, is it reflect the system clock? (I am a bit confused...) I know that other associations if exist reflect the state to a specific refid
Appreciate any help,
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