[ntp:questions] Time sync on a windows domain

David J Taylor david-taylor at blueyonder.not-this-bit.nor-this-part.co.uk
Mon May 28 06:29:59 UTC 2007


Ryan Malayter wrote:
> On May 27, 2:36 am, "David J Taylor"
> <david-tay... at blueyonder.not-this- bit.nor-this-part.co.uk> wrote:
>
>> Ryan,
>>
>> Running NTP on my Windows systems I don't see 32ms swings:
>>
>>  http://www.david-taylor.myby.co.uk/mrtg/daily_ntp.html
>
> I should have qualified my statements a bit more... I meant using the
> Windows Time Service, the clock reports time within about +/- 16 ms
> offset. However, because of the limited resolution of Windows Time
> Service (2**-6 seconds), there is a lot of quantization noise, and it
> looks like "steps" within that 32 ms window (see my graph).
>
> When running the Windows versions of the full ntpd, obviously the
> results are much better. Precision is reported as 2**-20, IIRC, and no
> "steps" (quantization noise) are seen.
>
> But the 16 ms resolution offered by w32time is good enough for many
> applications, and reducing complexity by not having another software
> package to deploy and maintain is often desirable.

Thanks for your clariifcation.

What is the URL for your graph?

If you can automate the software deployment it may not be too bad.

Cheers,
David 





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