Date: Fri, 1 Apr 2005 08:04:40 -0500 From: David Magda <dmagda@ee.ryerson.ca> To: Peter Jeremy <PeterJeremy@optushome.com.au> Cc: stable@freebsd.org Subject: Re: Kernel NTP flipping between FLL and PLL modes Message-ID: <c39d8d30ebd2ee994f784608129b00d6@ee.ryerson.ca> In-Reply-To: <20050401104508.GJ71384@cirb503493.alcatel.com.au> References: <20050401104508.GJ71384@cirb503493.alcatel.com.au>
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On Apr 1, 2005, at 05:45, Peter Jeremy wrote: > Any suggestions as to why this is happening? (And how I can stop > it regularly flipping) I don't think this is really an issue. It may be annoying to see it in the logs, but NTPv4 uses each algorithm when it's appropriate to get the most accurate time. Since network conditions change, the way NTP has to deal with them changes since it queries other NTP servers over the network. This was actually freebsd-questions last year and one response pointed to this paper: http://www.eecis.udel.edu/~mills/database/papers/allan.pdf You may want to check-out the the netgroup comp.protocols.time.ntp if you want to ask the experts (and authors) on NTP.
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