[ntp:questions] ntpd: time reset problem

Unruh unruh-spam at physics.ubc.ca
Mon Sep 14 21:33:50 UTC 2009


E-Mail Sent to this address will be added to the BlackLists <Null at BlackList.Anitech-Systems.invalid> writes:

>David Lord wrote:
>> Can you then suggest how it's at all possible for ntpd
>>  to be of any use on a mobile connection with such high
>>  latency?

>Interplanetary Timekeeping ?
><http://www.cis.udel.edu/~mills/ipin.html>


IF the latency is known to be symmetric ( which it is on an
interplanetary system) then large latency is no problem. If it is not
known to be symmetric and worse, both in and out latencies are variable,
then it is pretty well impossible.
Note that despite this, ntp is probably the best you can do. Ie, there
are no other procedures which will give you better time with those kind
of latencies.

>-- 
>E-Mail Sent to this address <BlackList at Anitech-Systems.com>
>  will be added to the BlackLists.




More information about the questions mailing list