On Tue, Sep 2, 2014 at 1:17 PM, Miroslav Lichvar <mlich...@redhat.com> wrote: > On Fri, Aug 29, 2014 at 06:31:10PM +0200, Kay Sievers wrote: >> On Wed, Aug 27, 2014 at 4:47 PM, Miroslav Lichvar <mlich...@redhat.com> >> wrote: >> > After receiving a reply from the server, allow two missed replies before >> > switching to another server to avoid unnecessary clock hopping when >> > packets are getting lost in the network. >> >> Hmm, what's the reason to do this? The servers in the list are not >> better or worse or sorted, are they? > > No, they are not, but offsets measured from different NTP servers are > usually different (as the clocks are never exactly accurate, there are > asymmetries in the network, etc.), so reselection introduces an offset > that has to be corrected, possibly by stepping the clock. Also the > polling interval may be shortened unnecessarily. > > Allowing few missed replies avoids reselection on every lost packet.
Sounds good. Applied. Thanks, Kay _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel
