Looking at the logs on my Sun Blade 2000 running Solaris 10, I see numerous occasions on which the time has been stepped. Looking at the few only (today, 1/5/2008), I see it was stepped around +0.3 sec at 3 AM, then -0.4 at 4:30 am, then half an hour later at 5am it was moved -0.6 sec, then 40 minutes later it is moved another -0.6 sec. Since then (its now 1:30 pm), it has not changed.
Is this excessive? I cant believe the clock is that unstable. Its not in an air-condition room, but the machine has an uptime of a few weeks, so it must be reasonably temperature stable now. Apr 27 14:08:07 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) 0.228893 s Apr 28 06:35:55 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) 0.177999 s Apr 28 06:59:39 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.338394 s Apr 28 21:22:22 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.270417 s Apr 29 02:52:35 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) 0.250878 s Apr 29 07:09:23 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) 0.129417 s Apr 29 07:36:45 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.331172 s Apr 29 21:08:29 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) 0.220048 s Apr 29 23:09:43 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.261370 s Apr 30 00:00:50 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.386788 s Apr 30 17:23:40 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.188325 s May 1 03:01:27 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) 0.296458 s May 1 04:29:22 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.444097 s May 1 05:00:18 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.635503 s May 1 05:39:13 kestrel xntpd[245]: [ID 774427 daemon.notice] time reset (step) -0.665786 s My config file is below. I'm not sure if I would be better picking time servers close to me. # ident "@(#)ntp.server 1.6 00/07/17 SMI" # # /etc/inet/ntp.server # # An example file that could be copied over to /etc/inet/ntp.conf and # edited; it provides a configuration template for a server that # listens to an external hardware clock, synchronizes the local clock, # and announces itself on the NTP multicast net. # # This is the external clock device. The following devices are # recognized by xntpd 3-5.93e: # # XType Device RefID Description # ------------------------------------------------------- # 1 local LCL Undisciplined Local Clock # 2 trak GPS TRAK 8820 GPS Receiver # 3 pst WWV PSTI/Traconex WWV/WWVH Receiver # 4 wwvb WWVB Spectracom WWVB Receiver # 5 true TRUE TrueTime GPS/GOES Receivers # 6 irig IRIG IRIG Audio Decoder # 7 chu CHU Scratchbuilt CHU Receiver # 8 parse ---- Generic Reference Clock Driver # 9 mx4200 GPS Magnavox MX4200 GPS Receiver # 10 as2201 GPS Austron 2201A GPS Receiver # 11 arbiter GPS Arbiter 1088A/B GPS Receiver # 12 tpro IRIG KSI/Odetics TPRO/S IRIG Interface # 13 leitch ATOM Leitch CSD 5300 Master Clock Controller # 15 * * TrueTime GPS/TM-TMD Receiver # 17 datum DATM Datum Precision Time System # 18 acts ACTS NIST Automated Computer Time Service # 19 heath WWV Heath WWV/WWVH Receiver # 20 nmea GPS Generic NMEA GPS Receiver # 22 atom PPS PPS Clock Discipline # 23 ptb TPTB PTB Automated Computer Time Service # 24 usno USNO USNO Modem Time Service # 25 * * TrueTime generic receivers # 26 hpgps GPS Hewlett Packard 58503A GPS Receiver # 27 arc MSFa Arcron MSF Receiver # # * All TrueTime receivers are now supported by one driver, type 5. # Types 15 and 25 will be retained only for a limited time and may # be reassigned in future. # # Some of the devices benefit from "fudge" factors. See the xntpd # documentation. # Either a peer or server. Replace "XType" with a value from the # table above. #server navobs1.oar.net 127.127.8.0 mode 5 #server gnomon.cc.columbia.edu 127.127.8.1 mode 5 #server ntp.colby.edu 127.127.8.2 mode 5 #server clepsydra.dec.com 127.127.8.3 mode 5 #server chronos.cru.fr 127.127.8.4 mode 5 server navobs1.oar.net server utcnist.colorado.edu server gnomon.cc.columbia.edu server ntp.colby.edu server clepsydra.dec.com server chronos.cru.fr server ptbtime1.ptb.de server ntp.metas.ch #server 127.127.XType.0 prefer #server 127.127.8.0 prefer #fudge 127.127.XType.0 stratum 0 ### uncommenting bradcost #broadcast 224.0.1.1 ttl 4 broadcast 224.0.1.1 ttl 0 #enable auth monitor driftfile /var/ntp/ntp.drift statsdir /var/ntp/ntpstats/ logconfig =all #filegen peerstats file peerstats type day enable #filegen loopstats file loopstats type day enable #filegen clockstats file clockstats type day enable #keys /etc/inet/ntp.keys #trustedkey 0 #requestkey 0 #controlkey 0 _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
