[ntp:questions] NTP and SNTP in the end, give me precision of 1ms?
unruh-spam at physics.ubc.ca
Sun Sep 14 16:27:55 UTC 2008
hal-usenet at ip-64-139-1-69.sjc.megapath.net (Hal Murray) writes:
>>There is nothing per se that makes this system impossible to deliver 1ms.
>>Of course it depends of where those clients are-- if they are at the bottom
>>of the sea communicating with 1bd/sec ultralow frequency radio, you will
>>not get 1ms precision.
>What's wrong with a (very) slow link? As long as there aren't any
>queueing delays, the delay should be symmetric in both directions
>and I'd expect ntpd to work OK.
And I would expect a many second difference in the delay times in the two
directions. If nthing else but slightly different message lengths.
>Does 1 bd/sec overflow some of ntpd's assumptions? Would it need
>some minpoll tweaking?
>Or maybe I should ask: How slow a link is still useful?
>These are my opinions, not necessarily my employer's. I hate spam.
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