[ntp:questions] Client doesn't drop failed source
unruh at wormhole.physics.ubc.ca
Sat Jan 9 04:18:16 UTC 2010
On 2010-01-09, Michael Moroney <moroney at world.std.spaamtrap.com> wrote:
> David Woolley <david at ex.djwhome.demon.invalid> writes:
>>Michael Moroney wrote:
>>> that synchronizes with the four clocks, and ntpq> peers shows one of the
>>> primaries with a "*" in the first column meaning it was synchronized to as
>>> time source, the other 3 show "+" as expected, meaning they are usable
>>> sources. We disconnect the antenna of the selected clock. As expected
>>* and + mean they are used, not just that they are usable. The time
>>used to discipline the clock is a weighted average of all of them.
> If it uses all of them, what is the difference between "*" and "+"?
> It still doesn't explain why the disconnected clock doesn't get dropped.
>>> the clock (Spectracom) changes its stratum from 1 to 16 after a delay, and
>>If it remains the best choice it could take up to 8192 seconds before
>>all the samples are flushed from the FIFO and it becomes completely
>>ineligible. There is logic to discourage early switching, as clock
>>hopping is, itself, considered a bad thing.
> OK, is 8192 the default time before a nonresponsive host gets dropped?
No, 8 poll intervals, whatever your poll interval is.
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