[ntp:questions] 500ppm - is it too small?

Ulrich Windl Ulrich.Windl at RZ.Uni-Regensburg.DE
Thu Nov 12 12:39:56 UTC 2009

"nemo_outis" <abc at xyz.com> writes:

> "Richard B. Gilbert" <rgilbert88 at comcast.net> wrote in
> news:poydnd1spod4pBTXnZ2dnUVZ_vudnZ2d at giganews.com: 
>> I still haven't seen any argument that supporting a value greater than
>> 500 PPM is worth the trouble!
> I still haven't seen any evidence that there is much trouble - only 
> anticipatory speculative whinging. 

Think about the existing kernel implementations!

> Nor, for that matter, has there been much other than speculation and vague 
> anecdotal recollections that the 500 ppm limit *may* have had some 
> justification and not been entirely arbitrary.

Let's do it like IPv6: With NTPv6 lets move to 128bit timestamps. Then
you'll get your 96 bits worth frequency error. The a few people will
surely complain why somebody chose that arbitrary limit ;-)

> This doesn't inspire much confdence about the documentation of the 
> architecture and design decisions regarding ntp.
> Regards,

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