Folks, With a leap second occurring EOD June 30th, 2015, for sites choosing to use ntp, running the latest SuSE and Red Hat releases, when the ntpd daemon was configured with the "-x" option to adjust the system clock slowly instead of changing the time instantaneously, the system clock was incorrectly changed instantaneously when a leap second occurred.
This was very recently addressed ntp.org opened Bug 2745 - Summary: ntpd -x steps clock on leap second http://bugs.ntp.org/show_bug.cgi?id=2745 and released ntp-4.2.6p5-xleap.patch http://pkgs.fedoraproject.org/cgit/ntp.git/tree/ntp-4.2.6p5-xleap.patch Red Hat has released an ntp RHBA-2015:0690-1 https://rhn.redhat.com/errata/RHBA-2015-0690.html containing this patch and my understanding is that SuSE will do this in it's coming maintenance release. Mike O'Reilly IBM Linux Change Team PS ... I've watched every Dr. Who episode and time still confuses me. Rick Troth <rickt@velocityso ftware.com> To Sent by: Linux on LINUX-390@VM.MARIST.EDU 390 Port cc <linux-...@vm.mar IST.EDU> Subject Re: Network Time Protocol Daemon needed for zLinux? 03/19/2015 08:31 AM Please respond to Linux on 390 Port <linux-...@vm.mar IST.EDU> On 03/19/2015 10:28 AM, Scott Rohling wrote: > None of this has anything to do with the sun's position .. it's having > computers all over the world show the same time at whatever moment during > the day or night you choose. Timezones are just offsets to that. Methinks the leap seconds are celestially motivated. Otherwise, yes!, apply and offset and then trust z TOD. I suggested "ntpdate at periodic (long) intervals" for situations where the earth moved under your feet. It happens. -- Rick Troth Senior Software Developer Velocity Software Inc. Mountain View, CA 94041 Main: (877) 964-8867 Direct: (614) 594-9768 ri...@velocitysoftware.com <mailto:ri...@velocitysoftware.com> ------------------------------------------------------------------------ Signature <http://www.velocitysoftware.com/> *Follow us:* Facebook <http://www.facebook.com/pages/Velocity-Software/356098274460840> LinkedIn <http://www.linkedin.com/company/1798379> Twitter <http://www.twitter.com/VelocitySoftw> Xing <http://www.xing.com/companies/velocitysoftwaregmbh> ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
