[ntp:questions] preempt Option

mills at udel.edu mills at udel.edu
Wed Nov 8 16:34:08 UTC 2006


I may have misread your original question. The preempt option is 
intended for the pool scheme and may not work as you expect. A 
preemptable association is expendable and presumed to exist only as the 
survivor of the selection algorithm which acts to cast off outlyers 
until a minimum number of survivors remain. Unless you really know what 
you are doing, it is probably best that you avoid this option.


evandro at mailandnews.com wrote:

> Dave,
> Here's what I see:
> I configure a server to have a preempt association.  Instead of showing
> in the servers list with a KOD as you said, it doesn't show up at all.
> Will this preemptable server ever be contacted again?
> I came up the preempt server option because I wanted to have a backup
> server in case of failure of the main ones.  But because this server
> runs Windows XP, it's pretty jittery, and because it was close and was
> of a higher stratum than other more consistent servers, it ended up
> being picked as the sync server.  But in spite of NTP's decision, it's
> still a poor time reference.
> Or perhaps would letting the client do its best on its own be better
> than using a poor backup server?

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