[ntp:questions] Local (own site) NTP servers.

David J Taylor david-taylor at blueyonder.not-this-part.nor-this.co.uk.invalid
Fri Jul 24 06:26:28 UTC 2009


David Woolley wrote:
[]
> Normally people reckon in terms of low 10s of mss for Windows,
> although there are claims of better performance, possibly on lightly
> loaded systems.

When configured as a stratum-1 ref-clock, I regularly see much better than 
10ms with Windows:

~100-150us on an XP server system:
  http://www.satsignal.eu/mrtg/feenix_ntp_2.html

~500us on an XP interactive system:
  http://www.satsignal.eu/mrtg/stamsund_ntp_2.html

~100us on a Windows 2000 server system:
  http://www.satsignal.eu/mrtg/bacchus_ntp-p.html

For a Windows XP client system synced over the LAN to these stratum-1 
servers I typically see an accuracy of about 1.5ms.

  http://www.satsignal.eu/mrtg/narvik_ntp-b.html

Loopstats available:

  http://www.satsignal.eu/mrtg/daily_ntp.html#Loopstats

Temperature stability appears to be one limiting factor.

Cheers,
David 




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