[ntp:questions] NTP and SNTP in the end, give me precision of 1ms?

Unruh 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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