[ntp:questions] WiFi & NTP.

Richard B. Gilbert rgilbert88 at comcast.net
Thu Aug 30 14:45:01 UTC 2007


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"!




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