[ntp:questions] Re: NTP settings on overload network

david at djwhome.demon.co.uk david at djwhome.demon.co.uk
Sat Jul 1 08:22:25 UTC 2006

In article <1151666841.775293.92670 at i40g2000cwc.googlegroups.com>,
markon at gmail.com wrote:

> I am using NTPd on overloaded network where delay is going between 7ms
> - 1300ms and sometimes NTP wrongly synchronize time +-800s. Is that a
> way to properly set up ntp to work on this circumstances.

"tinker huffpuff" was introduced to cope with the typical case of this
symptom (e.g. lunch time web surfing peaks).  The other approach is to
re-compile with a maximum root delay that is only slightly larger than
than needed in non-overloaded times.

In the old days, the network would have been so slow that the maximum
root delay would have been exceeded anyway.  It is the increase in
connection speeds for sites with a consumer type traffic profile that
has meant that assymmetric delays don't trigger this limit.

> A log is below:

Your log covers an inadequate amount of time to actually show this
symptom properly as the key symptom is balancing positive and 
negative steps.

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