Re: [LEAPSECS] Look Before You Leap ? The Coming Leap Second and AWS | Hacker News

2015-05-19 Thread Poul-Henning Kamp
buggy standards with a huge installed base getting >fixed? Yes, plenty. Building codes. Electrical codes. Traffic codes. The deciding factor is always number of people killed and maimed. ... Or the rich loosing money, that always gets political action. -- Poul-Henning Kamp

Re: [LEAPSECS] Look Before You Leap – The Coming Leap Second and AWS | Hacker News

2015-05-19 Thread Poul-Henning Kamp
d"... Reported to me from the hall-way-track at the last WP7A meeting: "The main drive to ditch leap-seconds comes from the only country ever to flunk Metric-101" -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC

Re: [LEAPSECS] Look Before You Leap – The Coming Leap Second and AWS | Hacker News

2015-05-18 Thread Poul-Henning Kamp
oth choices, but I'd probably go with Googles to avoid the sharp corners. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by inco

[LEAPSECS] LOD and gravity connected ?

2015-04-29 Thread Poul-Henning Kamp
http://iopscience.iop.org/0295-5075/110/1/10002/article -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [LEAPSECS] Vive la différence! (was Re: financial markets)

2015-04-27 Thread Poul-Henning Kamp
ts will remove leaps from GMT as well, so there still won't be any difference, and people will in all likelyhood still confuse them. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never

Re: [LEAPSECS] financial markets

2015-04-26 Thread Poul-Henning Kamp
going on here is that the biggest financial hub in the USA doesn't know the difference between UTC and GMT. That just shows that timekeeping is already far to complex for normal people and that simplification and fewer timescales is the way to go. -- Poul-Henning Kamp | UNIX since Zi

Re: [LEAPSECS] the DNS idea is old

2015-04-09 Thread Poul-Henning Kamp
. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ LEAPSECS mailing list

Re: [LEAPSECS] Civil timekeeping before 1 January 1972

2015-03-13 Thread Poul-Henning Kamp
ronize computer clocks, in particular it defines the measurement unit on this scale to be 2^-32 SI second and the handling of epoch roll-overs (every 2^32 SI seconds). But more importantly, when we get to the point were we are arguing over the meaning of common well known words we might as well

Re: [LEAPSECS] Letters Blogatory

2015-03-11 Thread Poul-Henning Kamp
r his opinion, which as others have pointed out, interfaces badly with reality. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice w

Re: [LEAPSECS] final report of the UK leap seconds dialog

2015-02-06 Thread Poul-Henning Kamp
In message <20150206134600.gl61...@davros.org>, "Clive D.W. Feather" writes: >Poul-Henning Kamp said: >> The specification of local time is in (super-/sub-)national >> legislation. >> >> In EU it is in the directive about Daylight Savings Ti

Re: [LEAPSECS] final report of the UK leap seconds dialog

2015-02-05 Thread Poul-Henning Kamp
very good argument for the positioin notion that unelected and unrepresentative scientists should not get to decide where and when the Sun is supposed to be in the sky above. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [LEAPSECS] final report of the UK leap seconds dialog

2015-02-05 Thread Poul-Henning Kamp
ion. In EU it is in the directive about Daylight Savings Time. Most such legislation says "UTC +/- $integer_hours" and it follows trivially that leapseconds happen at localtime of +/- $integer_hours. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | T

Re: [LEAPSECS] final report of the UK leap seconds dialog

2015-02-05 Thread Poul-Henning Kamp
und and mostly populated I have a hard time seeing any other longitude offering significant relief from this problem. If one takes a strictly democratic view on this, China gets to veto quite a wide slab of longitudes, given that they have the timezone with most people in it. -- Poul-Henning Kam

Re: [LEAPSECS] final report of the UK leap seconds dialog

2015-02-05 Thread Poul-Henning Kamp
would happen at 8 or 9am on any day of the week, ie: during the busiest hour of traffic, on roads, rails and in the air ? That's what a similar "dialog" would warn about, if it were conducted in China or Japan. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@fr

[LEAPSECS] Spot the leapsecond

2015-02-02 Thread Poul-Henning Kamp
http://xkcd.com/1481/ -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence

Re: [LEAPSECS] All of this has happened before

2015-01-29 Thread Poul-Henning Kamp
In message , Rob Seaman writes: >On Jan 28, 2015, at 1:34 PM, Poul-Henning Kamp wrote: > >> "Derives from" is not a "physical reality", it's merely a social custom. > >So many replies to choose from [...] ... all of them unresponsive to my com

Re: [LEAPSECS] All of this has happened before

2015-01-28 Thread Poul-Henning Kamp
In message , Rob Seaman writes: >And length of day most assuredly derives from the synodic day, >i.e., mean solar time. Is there not one fewer day in the year than >sidereal rotations? "Derives from" is not a "physical reality", it's merely a soci

Re: [LEAPSECS] The leap second, deep space and how we keep time -Brooks

2015-01-28 Thread Poul-Henning Kamp
ll, these guesses/estimates are not inferior to the ones you already list ? Listing them all would be sound science, and maybe the good ol' "Trust the median" will eventually help us, given enough estimates ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org

Re: [LEAPSECS] All of this has happened before

2015-01-28 Thread Poul-Henning Kamp
rt your opinions. Likewise, as for your personal "physical reality" isn't trumping anything, unless you're also the one paying the piper. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-taho

Re: [LEAPSECS] leap second and DUT1 database

2015-01-28 Thread Poul-Henning Kamp
ilover is possible, in both the hot and cold spare case. GPS is actually the easy case, because the announce leap seconds months in advance. DCF77 gives you only one hour notice about the leapsecond. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC

Re: [LEAPSECS] CEPT ECC viewpoint on leap seconds

2015-01-28 Thread Poul-Henning Kamp
at we can ever implement leap-seconds in a responsible fashion, if even a such persons do not grasp what it is ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD s

Re: [LEAPSECS] The leap second, deep space and how we keep time -Brooks

2015-01-28 Thread Poul-Henning Kamp
even demanding, that the pedestrians upgrade their programming skills is not credible however. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately

Re: [LEAPSECS] The leap second, deep space and how we keep time -Brooks

2015-01-28 Thread Poul-Henning Kamp
d noises". It would certainly improve things a lot, because clients, which may upgrade at a different rate than servers, could just ignore any server which indicates a leapsecond. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeB

Re: [LEAPSECS] Bulletin C and all that

2015-01-25 Thread Poul-Henning Kamp
be garbage; it's so bad it makes me dislike the entire >organization. Fortunately your personal tastes or distastes have little impact on what is the normative definition. Like it or not, 8601 it is. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP

Re: [LEAPSECS] DNS examples

2015-01-24 Thread Poul-Henning Kamp
In message , Tim Shepard writes: >What should "next.leapsec.com" point at after July 1, 2015 in the few >weeks before Bulletin C number 50 is issued? It should point to C49 until C50 is published. And I think it should be bulletin-c.$domain -- Poul-Henning Kamp

Re: [LEAPSECS] crc-8?

2015-01-23 Thread Poul-Henning Kamp
fashion, [...] Nope. Only if the probability of bit-flipping depends on the data, but that has nothing to do with CRC. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to ma

Re: [LEAPSECS] crc-8?

2015-01-23 Thread Poul-Henning Kamp
t the number of >leap seconds, rather than just tell a general lie about an IP address, >the CRC won't protect you. Sorry, I somehow got the sign flipped on what you said. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeB

Re: [LEAPSECS] DNS examples

2015-01-23 Thread Poul-Henning Kamp
most recent bulletin C. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.

Re: [LEAPSECS] crc-8?

2015-01-23 Thread Poul-Henning Kamp
. Uhm, that crafty DNS server would surely be able to come up with a new non-eyebrow-raising CRC8 value as well... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to mal

Re: [LEAPSECS] crc-8?

2015-01-23 Thread Poul-Henning Kamp
undoubtedly be overkill. The CRC protects against the common risks (lying DNS resolvers), we don't need more than that. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-t

Re: [LEAPSECS] DNS examples

2015-01-23 Thread Poul-Henning Kamp
he old >record had to be restored. It's the difference between "have not been told that X will happen" and "have been told that X will not happen." -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committe

Re: [LEAPSECS] stale leap second information

2015-01-19 Thread Poul-Henning Kamp
In message , Tony F inch writes: >If you are only broadcasting the next or just recently occurred leap >second, What I'm doing is really making Bull-C available with a trivial DNS query. It is exactly the info from Bull-C I want to encode, no more, no less. -- Poul-H

Re: [LEAPSECS] stale leap second information

2015-01-19 Thread Poul-Henning Kamp
c. > >What do "free WIFI" portals do with TXT records? A fair number of them seem to return "A $MYGW" for *any* DNS query. >What do they do with NTP requests? They generally seem to allow NTP through once you're logged in. -- Poul-Henning Kamp | UNI

Re: [LEAPSECS] stale leap second information

2015-01-18 Thread Poul-Henning Kamp
ity, I would send both an IPv6 and IPv4 DNS record as response, hoping that at least one of them makes it through. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Neve

Re: [LEAPSECS] Comments on predictions for this century

2015-01-18 Thread Poul-Henning Kamp
atmospheric warming, because it seems a lot of the heat went into the oceans instead. (And that should worry people a LOT!) 3. The coincidence is that the volcanoes may connect two rather different phenomena on a decadal scale. -- Poul-Henning Kamp | UNIX since Zilog Zeu

Re: [LEAPSECS] stale leap second information

2015-01-17 Thread Poul-Henning Kamp
n any API to execute a custom DNS query. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be exp

Re: [LEAPSECS] Comments on predictions for this century

2015-01-17 Thread Poul-Henning Kamp
g both ways, as a matter of stresses in one direction and lubrication in the other. As interesting as this might be intellectually, if melting ice-sheets case an order of magnitude more volcano eruptions leap seconds will not be our most pressing problem. Poul-Henning -- Poul-Henning Kamp |

Re: [LEAPSECS] stale leap second information

2015-01-17 Thread Poul-Henning Kamp
cused on how NTP/PTP clients will be able to get/validate leapsecond information efficiently and reliably. >Unless there is an overriding value in efficient encoding, There is. getaddrinfo(3) is almost always available and works about as well as any protocol on the internet can work. --

Re: [LEAPSECS] stale leap second information

2015-01-17 Thread Poul-Henning Kamp
ng these numbers as source or destination addresses. 2. I live in a civilized society and have repeatedly heard lawyers from the US deflate once they realized that they didn't known what the relevant laws said, much less the language to find out. -- Poul-Henning Kamp | UNIX

Re: [LEAPSECS] stale leap second information

2015-01-17 Thread Poul-Henning Kamp
In message <89326.1421483...@critter.freebsd.dk>, "Poul-Henning Kamp" writes: >I played a bit with the idea this morning, and I think this is how I would >do it: > > +---+---+-+-+---+ > |1 1 1 1|M M M M M

Re: [LEAPSECS] stale leap second information

2015-01-17 Thread Poul-Henning Kamp
Attached is a proof of concept in python. You can poke the result at my test-domain "leap.net-tid.dk" Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC

Re: [LEAPSECS] stale leap second information

2015-01-16 Thread Poul-Henning Kamp
belief that you can trust these fine gentlemen ? I doubt it. The ideal situation would be that IERS and the major timelabs agreed to do this, so that a DNS lookup of leapsecond.iers.org, leapsecond.nist.gov, leapsecond.ptb.de and so an all did the same thing, and people could pick who they trust

Re: [LEAPSECS] stale leap second information

2015-01-16 Thread Poul-Henning Kamp
eekend regarding the CRC checksum... The CRC is there to detect when DNS replies are rewritten to point everything at captive portals, as is the case on a lot of "free WIFI" networks etc. Your idea offers no way to detect that... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.2

Re: [LEAPSECS] stale leap second information

2015-01-16 Thread Poul-Henning Kamp
(1...12) 8 bit signed int before count 2 bit signed int (after - before) count 10 bit CRC-10 Obviously the IPv6 mapping can be even more robust. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committ

Re: [LEAPSECS] stale leap second information

2015-01-16 Thread Poul-Henning Kamp
lookup and get the TTL and don't need to do another lookup until the TTL expires. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice

Re: [LEAPSECS] This year's Y2K: 'Leap second' threatens to break the Internet -Brooks

2015-01-15 Thread Poul-Henning Kamp
rder of a millisecond per year. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by inc

Re: [LEAPSECS] stale leap second information

2015-01-14 Thread Poul-Henning Kamp
t has been documented since at least NTPv3 a couple of decades ago. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _

Re: [LEAPSECS] stale leap second information

2015-01-14 Thread Poul-Henning Kamp
In message <20150114115758.gvgcdclg%sdao...@yandex.com>, Steffen Nurpmeso write s: >"Poul-Henning Kamp" wrote: > | > |In message <54b621b5.1080...@rubidium.dyndns.org>, Magnus Danielson writes: > | > |>> About one year ago I contac

Re: [LEAPSECS] stale leap second information

2015-01-14 Thread Poul-Henning Kamp
rks almost everywhere. > >That would be one of many ways that it should be distributed. Absolutely. But the reason why DNS would be nice is that it's lightweight. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD commit

Re: [LEAPSECS] stale leap second information

2015-01-14 Thread Poul-Henning Kamp
eally useful would be if they provided the current leapsecond count and the date of the next (if known) via DNS. DNS because it has built in caching and works almost everywhere. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD co

Re: [LEAPSECS] stale leap second information

2015-01-13 Thread Poul-Henning Kamp
l sense, but in these days of "cyberwar worries" a lot of people will not be legally able to rely on it anymore... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to

Re: [LEAPSECS] the big artillery

2014-11-06 Thread Poul-Henning Kamp
23°59' and 24°00' had sixtyone seconds once every other year or so. "minutes" and "seconds" are fractions of 60 and have been so since babylonian times for minutes and since 13-mumble for seconds. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.o

Re: [LEAPSECS] Notation for transmitted vs. paper time scales

2014-11-05 Thread Poul-Henning Kamp
tion of a second. But today the "paper" is used ti signify things which needlessly takes weeks and months. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice

Re: [LEAPSECS] Notation for transmitted vs. paper time scales

2014-11-05 Thread Poul-Henning Kamp
algorithm (ie: one which reduces a clocks weight earlier in time for something it did later.) For all practical purposes we could dismiss with paper clocks and go real time, but I'm sure astronomers will tell us that would do things to the cows milk or something... -- Poul-Henning Ka

Re: [LEAPSECS] the big artillery

2014-10-30 Thread Poul-Henning Kamp
;. You mean the same way leapseconds redefine "minute" by making them have the counter intuitive numbers of seconds ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribu

Re: [LEAPSECS] Changing the name of UTC

2014-10-16 Thread Poul-Henning Kamp
M-DD, for "UTC" read ${NEW_UTC_NAME}" would clear the hurdle they erected in one line. So even if the #2 crowd wins their name-change battle, they would still loose the war. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TC

Re: [LEAPSECS] Do lawyers care (know) about leap seconds?

2014-10-01 Thread Poul-Henning Kamp
dy has support for it, and the data received by NTP >is then clear and complete. And because the typical update cycle for the time-zone database is highly erratic and nonexistent on many legacy platforms. If leap-seconds were announced 10 years in advance it would be different. -- Poul-Henning

Re: [LEAPSECS] Leap second relationship to ISO 8601

2014-08-28 Thread Poul-Henning Kamp
sn't care or try to make sense of what the numbers might mean. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be e

Re: [LEAPSECS] Leap second relationship to ISO 8601

2014-08-27 Thread Poul-Henning Kamp
if you had written some ...EST or ...DST, and that would take you into the murky swamp of the olsen timezone database. By explicitly stating the UTC offset numerically, 8601 decouples it from any cultural basis it might have had and becomes a standalone representation of a moment in time. --

Re: [LEAPSECS] Leap second relationship to ISO 8601

2014-08-27 Thread Poul-Henning Kamp
ot represent daylight saving nor time zones. I'm told this was by design. The intent was that you could always use an 8601 string without reference to "external cultural databases". -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 9

Re: [LEAPSECS] Earth speeding up?

2014-04-15 Thread Poul-Henning Kamp
which would make it anybodys guess what will happen. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.

Re: [LEAPSECS] earth speeding up

2014-04-15 Thread Poul-Henning Kamp
That said, I'm not sure I fully buy Toms prediction yet, 35 years isn't that long of a data-set -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what ca

Re: [LEAPSECS] Forgetting summer time

2014-04-02 Thread Poul-Henning Kamp
ood drive current to the vibrator motor. The missing SIM card would be the key here: Without that the phone doesn't set its clock from the network. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-t

Re: [LEAPSECS] tz mail list, ado points to Matsakis of USNO

2014-03-01 Thread Poul-Henning Kamp
t;define the second", the explicitly picked up the SI standard second. You have no idea how tired I'm getting of you continuously spewing this kind of manipulative crap... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [LEAPSECS] xkcd clock

2014-02-26 Thread Poul-Henning Kamp
on the three times I've looked at it today. http://xkcd.com/now -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what c

Re: [LEAPSECS] xkcd clock

2014-02-26 Thread Poul-Henning Kamp
In message , "Richard B. Langley" writes: >Guess this is meant to be used with the image printed out and then >the map and time zones circle cut out and then pinned at [...] No, it's intended to be used on-line, where it is supposedly always in the right configuration.

Re: [LEAPSECS] Definition of Standard time - Brooks Harris

2014-02-16 Thread Poul-Henning Kamp
o vague and fuzzy that we should naturally expect people to use it carelessly and without any formal definition. Sort of like "RS-232"... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-ta

Re: [LEAPSECS] happy anniversary pips

2014-02-11 Thread Poul-Henning Kamp
was a leap second. > >My understanding wasn't that all Linux kernels crashed. Only the ones which cared enough about time-keeping to run NTPD. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-

Re: [LEAPSECS] happy anniversary pips

2014-02-07 Thread Poul-Henning Kamp
ing a quick and swift death back when that was first proposed. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately b

Re: [LEAPSECS] Embedded software

2014-01-19 Thread Poul-Henning Kamp
In message <20140119182454462945.77293...@comcast.net>, Joseph Gwinn writes: >This is the bounding case. ATC systems typically do not jump at the >leap, they slide over 10 seconds or so. In Denmark they go hands off "until stuff look normal again". -- Poul-Henning K

Re: [LEAPSECS] Birth date question

2014-01-19 Thread Poul-Henning Kamp
l the way >through the system. Conversely, it potentially exposes parents >to an additional year of childcare costs. Yes, similar 'red lines' exist in most countries. The point I made was that the state does not care what side of that line any one particular kid lands. -- Poul-Hen

Re: [LEAPSECS] Future time

2014-01-19 Thread Poul-Henning Kamp
them to figure out when to get out of bed in their local realities. My experience is that people react with surprise initially, but that once you've "broken them in" and explained why you do it, there are far fewer "oops I missed the time" incidents, in particular aro

Re: [LEAPSECS] Future time

2014-01-19 Thread Poul-Henning Kamp
In message <20140119164807.ga19...@ucolick.org>, Steve Allen writes: >If the leap seconds were placed into a similarly inconsequential part >of the interfaces then the applications could be similarly wrong about >leap seconds yet life would go on. They are. It does. So far. -

Re: [LEAPSECS] Birth date question

2014-01-19 Thread Poul-Henning Kamp
n the morning, despite the fact that they likely were born later in the day -- or maybe even in a different timezone. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute

Re: [LEAPSECS] Common Calendar Time (CCT) -Brooks Harris

2014-01-18 Thread Poul-Henning Kamp
In message <71d95256-adee-4323-ade4-b945643ab...@batten.eu.org>, Ian Batten wri tes: > >On 18 Jan 2014, at 11:28, Poul-Henning Kamp wrote: >> >> For instance I doubt you'll find any UK politician willing to push >> a s/GMT/$whatever/ legislation since that wi

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-18 Thread Poul-Henning Kamp
power. The question is if anybody is going to follow their *recommendation*. It's not like their recommendations have much legal weight, remember the OSI protocols ? Remember the Modem Wars ? -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP sinc

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-18 Thread Poul-Henning Kamp
t is inappropriate to require that a time >represented as seconds since the Epoch precisely represent the number of >seconds between the referenced time and the Epoch." That made a lot of sense at the time: Operators would have had to manually update systems to know about the leap sec

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-18 Thread Poul-Henning Kamp
roblem" would be quite >different. time_t uses at least the concept of "day". No, in fact it doesn't, it just counts seconds, one after the other. The reason why leapseconds is a problem is that people assume that it *also* counts minutes, hours and days also. -- Poul-

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-18 Thread Poul-Henning Kamp
Standards should be written for the future, the past don't care if you change them. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be e

Re: [LEAPSECS] Common Calendar Time (CCT) -Brooks Harris

2014-01-18 Thread Poul-Henning Kamp
will just feed the UKIP trolls and become a factor in the Scottish independence referendum. So exactly how do you propose to sell this idea ? Remember, the your "competition", changing the definition of UTC without retaining the name does not require any laws to be changed. -- Poul-Henning

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-18 Thread Poul-Henning Kamp
ware, the POSIX time_t does not do that. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-17 Thread Poul-Henning Kamp
quot; according to the parents wishes. And then came the kicker: One of the older nurses gravely pointed out that it *was* important to get it *exactly right*, otherwise the newborn couldn't rely on his horoscope. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | T

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-16 Thread Poul-Henning Kamp
: Number of computers with correct clocks pretty much follows the fraction of computers running something better than Win98 and connected to the net by non-dial-up means. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-16 Thread Poul-Henning Kamp
ooth function of time in most countries. UTC was standardized exactly in order to get these legislators out of international phone bills. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe

Re: [LEAPSECS] LEAPSECS Digest, Vol 88, Issue 31

2014-01-15 Thread Poul-Henning Kamp
In message , Richard Clark writes: >I've always liked the view that the first century spanned the years 1-99. Yes, the appeal is obvious, apart from that pescy detail of "century" meaning "hundred"... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@

Re: [LEAPSECS] LEAPSECS Digest, Vol 88, Issue 31

2014-01-15 Thread Poul-Henning Kamp
g about this subject from what I'd call trustworthy sources. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be

Re: [LEAPSECS] LEAPSECS Digest, Vol 88, Issue 31

2014-01-14 Thread Poul-Henning Kamp
Anno Domini" convention was put into tradition, it would only make sense for them to talk about the year before and the year after. Nobody would have any reason to put a zero in there, If they had tried to do so, it would give no meaning to them, because "year zero" would literall

Re: [LEAPSECS] LEAPSECS Digest, Vol 88, Issue 31

2014-01-14 Thread Poul-Henning Kamp
In message <52d5cb82.1050...@cox.net>, Greg Hennessy writes: >On 01/14/2014 06:29 PM, Poul-Henning Kamp wrote: > >> It follows rather trivially from the fact that there were no >> year zero, that the first century must contain the years [1...100] in >> order to

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-14 Thread Poul-Henning Kamp
ernments who can mess with their timezones as they see fit. Also, what Warner and I have proposed is that it *might* be possible to make leap-seconds less damaging by announcing them 10 years in advance, rather than a fraction of a year ahead of time. But the changing-reality-thingie ? Nope, havn&#x

Re: [LEAPSECS] LEAPSECS Digest, Vol 88, Issue 31

2014-01-14 Thread Poul-Henning Kamp
years [N*100-99, N*100] Consequently the 20th century must be the years [1901...2000] Q.E.D. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adeq

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-14 Thread Poul-Henning Kamp
In message <20140114150535.ga4...@ucolick.org>, Steve Allen writes: >These international agencies with multi-letter-acronym names are >still not listening to each other about the nitty gritty details. ... said the man from UCO/LO(ISB) :-) -- Poul-Henning Kamp | UNIX sinc

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-14 Thread Poul-Henning Kamp
to any particular lump of orbital debris. In particular not in deference to lack of imagination on the part of scientist two centuries ago. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Nev

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-14 Thread Poul-Henning Kamp
In message <20140114103334.gv21...@fysh.org>, Zefram writes: >Poul-Henning Kamp wrote: >>They chose UTC because they meant UTC. >... >>The reason why they didn't cater to leap-seconds ? >> >>They hadn't heard about them at the time. > >It's

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Poul-Henning Kamp
special purpose navigation service for the U.S. Navy. And this timeline may also provide clues, if somebody sift it: http://www.loran-history.info/LORAN_Implementation_Planning_Installation_and_Termination/1950-1959/1950_1959.htm -- Poul-Henning Kamp | UNIX since Zi

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Poul-Henning Kamp
tamps on the X.25 lines, and we just slaved to those, trusting that if it was good enough for telcos, we'd be clear also. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to m

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Poul-Henning Kamp
chive I might be able to find it. He's also still alive so he can be asked, but his eyesight is very very bad, and I doubt he reads emails any more. (Dave Mills was intimately involved in Loran-C, and he's the brain behind the 16-pulse "tactical" Loran-C during the vietnam war.)

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-13 Thread Poul-Henning Kamp
and protocols for handling traffic and time on international telegraph, telephone and radiotelephone connections. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to mali

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-12 Thread Poul-Henning Kamp
ation, was to make it possible to precisely schedule and bill international tele-traffic. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explaine

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-12 Thread Poul-Henning Kamp
In message <52d2fe51.40...@cox.net>, Greg Hennessy writes: >On 01/12/2014 02:47 AM, Poul-Henning Kamp wrote: >> In message <52d20beb.60...@edlmax.com>, Brooks Harris writes: >> >> >>> Yes, in my opinion its unfortunate they chose to use the term "

Re: [LEAPSECS] presentations from AAS Future of Time sessions

2014-01-12 Thread Poul-Henning Kamp
;inside" UTC didn't mater to them, UTC was the accepted international timescale and they used it as such. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what c

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