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Re: Predictable Internet Time

2017-03-28 01:38:20
Joe,

I have read your I-D and like it! Let me start there :-)

What I think is not clear enough is the problem with POSIX, and it should be 
more clear in some place, maybe section 6.1, that POSIX definition which is in 
use in quite a number of systems do not handle leap second very well. Too many 
do believe the time_t definitions include the number of seconds since epoch 
when in reality it does not (as you note in the definitions).

One could even question whether it is Continuous as two seconds will have the 
same number since epoch around the addition of a leap second (the last second 
of the day with leap second and the first the day after the addition of leap 
second). I claim it is not as if you look at also fractions of seconds it will 
go backward like:

:
(N-1).0
(N-1).1
:
(N-1).9
N.0
N.1
:
N.9
N.0
N.1
:
N.9
(N+1).0
(N+1).1
:

There are some people that have suggested a change, for example 
<http://www.cl.cam.ac.uk/~mgk25/time/c/> but I have not seen any movement. 
Maybe you know more than me on this?

   Patrik

On 27 Mar 2017, at 21:34, Joe Touch wrote:

Hi, all,

I've submitted the time frame discussion intended to resolve this issue, 
which also recently arouse on another mailing list. Further discussion on 
this draft will occur on the ART mailing list (art(_at_)ietf(_dot_)org).

Joe

-----------

A new version of I-D, draft-touch-time-01.txt
has been successfully submitted by Joe Touch and posted to the IETF 
repository.

Name:         draft-touch-time
Revision:     01
Title:                Resolving Multiple Time Scales in the Internet
Document date:        2017-03-27
Group:                Individual Submission
Pages:                17
URL:            https://www.ietf.org/internet-drafts/draft-touch-time-01.txt 
Status:         https://datatracker.ietf.org/doc/draft-touch-time/
Htmlized:       https://tools.ietf.org/html/draft-touch-time-01 Htmlized:     
  https://datatracker.ietf.org/doc/html/draft-touch-time-01 Diff:           
https://www.ietf.org/rfcdiff?url2=draft-touch-time-01

Abstract:
   Internet systems use a variety of time scales, which can complicate   time 
comparisons and calculations. This document explains these   various ways of 
indicating time and explains how they can be used   together safely. This 
document is intended as a companion to   Internet time as discussed in RFC 
3339.

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