[time] outlier

David J Taylor david-taylor
Thu Nov 2 12:40:21 UTC 2006

Tim Shoppa wrote:
> "David J Taylor" <david-taylor at blueyonder.co.uk> wrote:
>> It's where one system is grossly different to all the rest.  Suppose
>> that you had 10 server.  Your offsets with 9 servers are in the
>> range -0.1s to +0.1s, but one server shows an offset of 0.9s.  It
>> would be the "outlier" - something which lies outside the rest.
> "Yeahbut" - NTP is particularly aggressive about marking servers
> as outliers, especially when it has a large number of servers to
> choose from. It can afford to be picky. It's usually not worth
> getting worked up about an outlier or two as being a bad server.
> In most (but not all!) cases transient outliers are the result
> of variable network latency.
> Tim.


I was under the impression that the OP was asking about the English 
language definition of outlier (particularly as it was mis-spelt), and I 
answered accordingly.

You clarification of the usage in the context of NTP is appreciated.

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