[ntp:questions] WiFi & NTP.

Richard B. Gilbert rgilbert88 at comcast.net
Fri Aug 31 00:49:06 UTC 2007


Kevin Oberman wrote:
>>From: "Richard B. Gilbert" <rgilbert88 at comcast.net>
>>Date: Thu, 30 Aug 2007 10:45:01 -0400
>>Sender: questions-bounces+oberman=es.net at lists.ntp.org
>>
>>
>>Maarten Wiltink wrote:
>>
>>>"Guy" <gdelavil at ens.insa-rennes.fr> wrote in message
>>>news:1188474891.630591.247300 at k79g2000hse.googlegroups.com...
>>>
>>>
>>>
>>>>Something important I forgot to mention is that my goal is not to
>>>>have the most precise absolute time but to have the smallest offset
>>>>as possible on a local network and using a WiFi connection.
>>>>
>>>>So I declared one of my devices as an NTP server and the other as a
>>>>client (syncing to a single time source as a matter of fact).
>>>
>>>
>>>The 'problem' with that is that you are then at the mercy of the
>>>stability of your server. The stability of the crystal that ultimately
>>>drives a local clock reference isn't great, it's quite temperature-
>>>dependent.
>>>
>>>On the other hand, it _is_ quite predictable - people have produced
>>>graphs where it is clearly visible when the airconditioning in the
>>>server room started up, or when doors and windows were opened.
>>>
>>>The lesson as I read it is to make sure your server has a stable
>>>environment. If the motherboard temperature is constant, so will be
>>>the crystal speed. However, you are surrounded here by some rather
>>>hardcore geeks, who read the lesson differently as requiring that you
>>>have the One True Time, and stability will naturally follow from it.
>>>
>>>Groetjes,
>>>Maarten Wiltink
>>>
>>>
>>
>>Let's hear it for "The One True Time"!
> 
> 
> And which time is that? UTC, GMT, TAI, ...?

UTC!

> 
> I hate leap seconds!!!

Leap seconds do not affect my daily existence.  My computer takes care 
of them.




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