[ntp:questions] Keeping NTP Honest
unruh-spam at physics.ubc.ca
Fri Jul 10 19:40:18 UTC 2009
Evandro Menezes <evandro at mailinator.com> writes:
>As I mentioned before, in some cases, NTP relies too much on low-
>stratum servers, even when they're blatantly wrong. For instance, the
>last leap second event, when many pool servers were poorly configured.
>Mulling over that, I wondered how I could tip NTP to scale down the
>poll period in such cases. So I tried this trick and it seems to work
>fairly well when only one server is kaput:
>server pool.ntp.org iburst maxpoll 6
>By having one server that remains polled every 64s, NTP could realize
>more quickly that there was something rotten in Denmark. However, if
>that one server is neither selected nor a candidate, this trick
>doesn't work. I'd hesitate to make it the preferred server though.
And you have at least a 1/5 chance that IT is the bad server. What do
you do then?
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