In last test I have made the unreachable source was selected for 10 min. After that I have stopped the test since it is way too long for our failover requirements. I will not have the system access for a while but I can write more description and provide debug logs at later time.
Fra: Miroslav Lichvar <mlich...@redhat.com> Sendt: 10. oktober 2019 16:24 Til: chrony-users@chrony.tuxfamily.org <chrony-users@chrony.tuxfamily.org> Emne: Re: [chrony-users] Multi-source: No source change from unreachable to reachable one On Thu, Oct 10, 2019 at 01:53:03PM +0000, Joanna Yurdal wrote: > chrony.conf: > refclock SHM 0 poll 2 dpoll 0 refid PTP0 precision 1.0e-9 delay 1.0e-04 prefer > server 192.168.3.103 iburst minpoll 2 > When SHM source looses reachability, each second both s-> last_sample_ago and > max_reach_sample_ago are increased by one > The condition never becomes true and the unreachable(invalid) source remains > the selected source forever. No, it shouldn't be selected forever. How long did you wait? With each sample dropped by the (reachable) NTP source max_reach_sample_ago should get smaller and at some point the SHM source should become "stale" and be unselected, if it doesn't happen earlier due to increased root distance. > I did not really understand the intention for this a comparison. > Was it indented to compare newest sample from unreachable source with the > newest sample from reachable source instead? No, it's supposed to compare the newest sample of the unreachable source with oldest sample of a reachable source to determine if the spans of the two sources still overlap. -- Miroslav Lichvar -- To unsubscribe email chrony-users-requ...@chrony.tuxfamily.org with "unsubscribe" in the subject. For help email chrony-users-requ...@chrony.tuxfamily.org with "help" in the subject. Trouble? Email listmas...@chrony.tuxfamily.org. -- To unsubscribe email chrony-users-requ...@chrony.tuxfamily.org with "unsubscribe" in the subject. For help email chrony-users-requ...@chrony.tuxfamily.org with "help" in the subject. Trouble? Email listmas...@chrony.tuxfamily.org.
