Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big picture)
Doug Arnold <doug.arnold@meinberg-usa.com> Fri, 08 January 2021 15:27 UTC
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From: Doug Arnold <doug.arnold@meinberg-usa.com>
To: Martin Burnicki <martin.burnicki@meinberg.de>, Ulrich Windl <Ulrich.Windl@rz.uni-regensburg.de>, "mlichvar@redhat.com" <mlichvar@redhat.com>, "emmanuel.fuste@thalesgroup.com" <emmanuel.fuste@thalesgroup.com>
CC: "ntp@ietf.org" <ntp@ietf.org>, "magnus@rubidium.se" <magnus@rubidium.se>
Thread-Topic: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big picture)
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Date: Fri, 08 Jan 2021 15:27:20 +0000
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Subject: Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big picture)
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When I first heard of leap seconds I thought it was a terrible idea, a clumsy hack. Since then I've come to understand that database and other application programmers are not timing people and often don't handle the possibility of leap seconds, or don't handle it correctly. I believe that Google and other large data center companies have figured out that it causes less problems to mess up the time for a while than to have leap seconds. Doug On 1/8/21, 10:22 AM, "Martin Burnicki" <martin.burnicki@meinberg.de> wrote: Doug Arnold wrote: > I think that the point of a leap smear is that no special handling of leap seconds is needed by the client. It is introduced gradually over a number of polling periods. That's exactly the point. You want to hide the leap second from the client to avoid that *applications* run into problems when the kernel just steps the time back by 1 second. Martin -- Martin Burnicki Senior Software Engineer MEINBERG Funkuhren GmbH & Co. KG Email: martin.burnicki@meinberg.de Phone: +49 5281 9309-414 Linkedin: https://www.linkedin.com/in/martinburnicki/ Lange Wand 9, 31812 Bad Pyrmont, Germany Amtsgericht Hannover 17HRA 100322 Geschäftsführer/Managing Directors: Günter Meinberg, Werner Meinberg, Andre Hartmann, Heiko Gerstung Websites: https://www.meinberg.de https://www.meinbergglobal.com Training: https://www.meinberg.academy
- [Ntp] NTPv5: big picture Hal Murray
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] NTPv5: big picture Hal Murray
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] NTPv5: big picture Doug Arnold
- Re: [Ntp] NTPv5: big picture Salz, Rich
- Re: [Ntp] NTPv5: big picture Hal Murray
- Re: [Ntp] NTPv5: big picture Kurt Roeckx
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- Re: [Ntp] NTPv5: big picture Paul Gear
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- [Ntp] NTP Security (was NTPv5: big picture) Hal Murray
- Re: [Ntp] NTPv5: big picture Hal Murray
- [Ntp] CLOCK_TAI (was NTPv5: big picture) Hal Murray
- Re: [Ntp] NTP Security (was NTPv5: big picture) Salz, Rich
- [Ntp] Antw: [EXT] Re: NTPv5: big picture Ulrich Windl
- [Ntp] Antw: [EXT] Re: NTPv5: big picture Ulrich Windl
- [Ntp] Antw: [EXT] Re: NTPv5: big picture Ulrich Windl
- [Ntp] Antw: [EXT] Re: NTPv5: big picture Ulrich Windl
- Re: [Ntp] Antw: [EXT] Re: NTPv5: big picture Kurt Roeckx
- [Ntp] Antw: Re: Antw: [EXT] Re: NTPv5: big picture Ulrich Windl
- Re: [Ntp] NTPv5: big picture Miroslav Lichvar
- Re: [Ntp] Antw: [EXT] Re: NTPv5: big picture Miroslav Lichvar
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] NTPv5: big picture Doug Arnold
- Re: [Ntp] NTPv5: big picture Doug Arnold
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTPv5: big picture Salz, Rich
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] Antw: [EXT] Re: NTPv5: big picture Magnus Danielson
- Re: [Ntp] Antw: [EXT] Re: NTPv5: big picture Magnus Danielson
- Re: [Ntp] NTPv5: big picture Dieter Sibold
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Warner Losh
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- [Ntp] Antw: [EXT] Re: NTPv5: big picture Ulrich Windl
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTPv5: big picture Miroslav Lichvar
- Re: [Ntp] NTPv5: big picture Miroslav Lichvar
- Re: [Ntp] NTPv5: big picture Miroslav Lichvar
- Re: [Ntp] NTPv5: big picture Hal Murray
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Hal Murray
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] Antw: [EXT] Re: NTPv5: big picture Magnus Danielson
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTPv5: big picture Miroslav Lichvar
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTPv5: big picture Salz, Rich
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTPv5: big picture James Browning
- Re: [Ntp] NTPv5: big picture Daniel Franke
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] NTPv5: big picture James Browning
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTPv5: big picture Daniel Franke
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Kurt Roeckx
- Re: [Ntp] NTPv5: big picture Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Kurt Roeckx
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] NTPv5: big picture Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTPv5: big picture Doug Arnold
- Re: [Ntp] NTPv5: big picture Doug Arnold
- Re: [Ntp] NTPv5: big picture Hal Murray
- Re: [Ntp] NTPv5: big picture Salz, Rich
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTPv5: big picture Hal Murray
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Kurt Roeckx
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTPv5: big picture Salz, Rich
- Re: [Ntp] NTPv5: big picture Daniel Franke
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Watson Ladd
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTPv5: big picture Philip Prindeville
- [Ntp] Antw: [EXT] Re: NTPv5: big picture Ulrich Windl
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Philip Prindeville
- [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big p… Ulrich Windl
- [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big p… Ulrich Windl
- [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big p… Ulrich Windl
- [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big p… Ulrich Windl
- [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big p… Ulrich Windl
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Hal Murray
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Paul Gear
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Paul Gear
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Philip Prindeville
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big p… Ulrich Windl
- [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: big p… Ulrich Windl
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Doug Arnold
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Doug Arnold
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Warner Losh
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Doug Arnold
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Martin Burnicki
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Doug Arnold
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Hal Murray
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Steve Allen
- Re: [Ntp] CLOCK_TAI (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… James
- [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (was NT… Ulrich Windl
- [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (was NT… Ulrich Windl
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… Hal Murray
- [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (was NT… Ulrich Windl
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… Hal Murray
- Re: [Ntp] Antw: [EXT] Re: CLOCK_TAI (was NTPv5: b… Martin Burnicki
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… Magnus Danielson
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… Martin Burnicki
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… Martin Burnicki
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… Martin Burnicki
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… FUSTE Emmanuel
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… Hal Murray
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… Magnus Danielson
- Re: [Ntp] Antw: Re: Antw: [EXT] Re: CLOCK_TAI (wa… FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) Watson Ladd
- Re: [Ntp] NTP Security (was NTPv5: big picture) James Browning
- Re: [Ntp] NTP Security (was NTPv5: big picture) Kurt Roeckx
- Re: [Ntp] NTP Security (was NTPv5: big picture) James
- Re: [Ntp] NTP Security (was NTPv5: big picture) Watson Ladd
- Re: [Ntp] NTP Security (was NTPv5: big picture) Harlan Stenn
- Re: [Ntp] NTP Security (was NTPv5: big picture) Hal Murray
- Re: [Ntp] NTP Security (was NTPv5: big picture) James Browning
- Re: [Ntp] NTP Security (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTP Security (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTP Security (was NTPv5: big picture) Hal Murray
- Re: [Ntp] NTP Security (was NTPv5: big picture) Salz, Rich
- Re: [Ntp] NTP Security (was NTPv5: big picture) Watson Ladd
- Re: [Ntp] NTP Security (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) Hal Murray
- Re: [Ntp] NTP Security (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) Mark Andrews
- Re: [Ntp] NTP Security (was NTPv5: big picture) Kurt Roeckx
- Re: [Ntp] NTP Security (was NTPv5: big picture) Salz, Rich
- Re: [Ntp] NTP Security (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTP Security (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) Kurt Roeckx
- Re: [Ntp] NTP Security (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTP Security (was NTPv5: big picture) Marcus Dansarie
- Re: [Ntp] NTP Security (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTP Security (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) Doug Arnold
- Re: [Ntp] NTP Security (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTP Security (was NTPv5: big picture) Magnus Danielson
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) Kurt Roeckx
- Re: [Ntp] NTP Security (was NTPv5: big picture) Salz, Rich
- Re: [Ntp] NTP Security (was NTPv5: big picture) Miroslav Lichvar
- Re: [Ntp] NTP Security (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTP Security (was NTPv5: big picture) Philip Prindeville
- Re: [Ntp] NTP Security (was NTPv5: big picture) Watson Ladd
- Re: [Ntp] NTP Security (was NTPv5: big picture) FUSTE Emmanuel
- Re: [Ntp] NTP Security (was NTPv5: big picture) Marcus Dansarie
- Re: [Ntp] NTP Security (was NTPv5: big picture) Magnus Danielson
- [Ntp] Antw: [EXT] Re: NTP Security (was NTPv5: bi… Ulrich Windl