I spoke too soon, it failed over to "foobar" right now. What's the recommended way to make this happen faster?
Thanks, Abhijith On Wed, Aug 21, 2024 at 3:13 AM Abhijith Sethuraj < abhijithsethur...@gmail.com> wrote: > Thanks, that's very helpful. > > Here's what I see: > > S Name/IP Address Auth COpts EOpts Last Score Interval Leap > ======================================================================= > * 1PPS N -P--- -P--- 1 1.0 -7ns +31ns N > D foobar N -P--- -P--- 3 1.0 -1550ns +2091ns N > > Going through the man pages, "foobar" is in "D" state when its root > distance (in a recent measurement) is greater than combinelimit * root > distance of current best source's root distance. So, I tried increasing > combinelimit to a higher value and it started combining. > The 1PPS signal is coming from a time server appliance that has a good > clock and uses a GNSS ref clock as well; "foobar" is another good source in > the same site. In such a case, is it best to combine both 1PPS and "foobar" > sources; or should I just use 1PPS (if available) and fallback to other > sources if 1PPS isn't available (that is, don't forcefully combine them)? > > Also, one thing that I noticed is that if I stop the 1PPS signals, it's > not falling back to "foobar"; 1PPS remains as the best source. Should I add > something in the configs to make this work? > > S Name/IP Address Auth COpts EOpts Last Score Interval Leap > ======================================================================= > * 1PPS N ----- ----- 228 1.0 -200us +200us N > D foobar N ----- ----- 1 1.0 -2650ns +1040ns N > > > Thanks in advance, > Abhijith > > > On Tue, Aug 20, 2024 at 3:45 PM Miroslav Lichvar <mlich...@redhat.com> > wrote: > >> On Tue, Aug 20, 2024 at 03:23:03PM +0530, Abhijith Sethuraj wrote: >> > Hello, >> > >> > We have a 1PPS input to the NIC and we're planning to run chrony to use >> > 1PPS as an additional refclock, in addition to getting time of day via >> NTP. >> > When we tried this out, we're not entirely sure if things work fine as >> the >> > source that gives time of day shows up as "unusable" in `chronyc >> sources`. >> >> The "?" character in the sources means a different state than those >> previously listed. Run chronyc selectdata -v to get the actual >> selection state. >> >> -- >> 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. >> >>
