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ntp: add offset option

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Add offset option to the server/pool/peer directive. It specifies a
correction which will be applied to offsets measured with the NTP
source. It's particularly useful to compensate for a known asymmetry in
network delay or timestamping errors.
This commit is contained in:
Miroslav Lichvar
2016-06-28 15:27:44 +02:00
parent 632cd1a177
commit 6cd558398a
5 changed files with 22 additions and 1 deletions
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7
doc/chrony.conf.adoc
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@@ -116,6 +116,13 @@ If a measurement has a ratio of the increase in the round-trip delay from the
minimum delay amongst the previous measurements to the standard deviation of
the previous measurements that is greater than the specified ratio, it will be
rejected. The default is 10.0.
*offset* _offset_:::
This option specifies a correction (in seconds) which will be applied to
offsets measured with this source. It's particularly useful to compensate for a
known asymmetry in network delay or timestamping errors. For example, if
packets sent to the source were on average delayed by 100 microseconds more
than packets sent from the source back, the correction would be -0.00005 (-50
microseconds). The default is 0.0.
*minsamples* _samples_:::
Set the minimum number of samples kept for this source. This overrides the
<<minsamples,*minsamples*>> directive.