and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds...
Should not be ms instead of us for a transatlantic cable? 60us at light
speed is only 18km ;)
Regards,
Javier
El 16/09/2011 23:53, shali...@gmail.com escribió:
I just read
@febo.com
Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds...
All this fuss over microseconds being worth billions and it still takes a
bank 5 days to find out if the check I wrote is good?
Where's a good manure scoop when you need one?
Tom Holmes, N8ZM
Tipp City, OH
EM79
On 18/09/11 13:32, shali...@gmail.com wrote:
Actually, if you pay attention, it probably only takes your bank a few uS to
debit your account when you write a check. It takes 5 days to credit it when
you receive one.
A perfect example of asymmetric processing :)
I am amazed checks is still
and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds...
All this fuss over microseconds being worth billions and it still takes a
bank 5 days to find out if the check I wrote is good?
Where's a good manure scoop when you need one
Interesting story, though I never heard of Oracle and fast used in the
same news article.
As an aside to what I guess is already an aside, the particle physics
guys use Linux too, but a special distribution.
http://www.scientificlinux.org/
Basically, they want to insure everyone is, shall
Careful, my particle physicists run RedHat. To be honest, I never heard of
Scientific Linux. Looking into it, I see it's a custom distro put together
by CERN.
-Bob D (Los Alamos National Lab)
On Sat, Sep 17, 2011 at 2:41 AM, gary li...@lazygranch.com wrote:
Interesting story, though I
time-nuts@febo.com
Subject: [time-nuts] Google NTP Servers and smearing leap seconds...
Time Technology and leaping seconds
http://googleblog.blogspot.com/2011/09/time-technology-and-leaping-seconds.html
The solution we came up with came to be known as the “leap smear.” We
modified our
-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] Google NTP Servers and smearing leap seconds...
Time Technology and leaping seconds
http://googleblog.blogspot.com/2011/09/time-technology-and-leaping-seconds.html
The solution we came up with came
In message 20110916084529.80082q5qgwy5p...@host111.hostmonster.com, xaos@dark
smile.net writes:
And you can forget most physicists and metrologists as well, the do not
want wavelengths, half-lifes and energies to depend on the time of day...
--
Poul-Henning Kamp | UNIX since Zilog Zeus
x...@darksmile.net said:
You can forget Wall St. firms and Banks for starters.
They need sub-microsecond accurate timing as some instruments (Forex) are
moving to 10 microsecond latency from order entry to order ack.
10 microsecond latency doesn't say anything about how accurate the time
You are right.
To be more precise, I should have said that the time sync should be at
least 1 order of magnitude less. In the case of 10us turnaround time,
it is assumed that the timesync is 1us. This is the reason that
everyone uses multiple stratum 1 NTP servers using GPS in their
@febo.com
Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds...
You are right.
To be more precise, I should have said that the time sync should be at
least 1 order of magnitude less. In the case of 10us turnaround time,
it is assumed that the timesync is 1us. This is the reason
and frequency measurementtime-nuts@febo.com; Hal
Murrayhmur...@megapathdsl.net
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds...
You are right.
To be more precise, I should have said
...@febo.com
Date: Fri, 16 Sep 2011 13:05:40
To: Discussion of precise time and frequency
measurementtime-nuts@febo.com; Hal Murrayhmur...@megapathdsl.net
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Google NTP Servers and smearing
: Fri, 16 Sep 2011 16:59:01
To: time-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds...
With the recent wild fluctuations in the Commodities markets it is
incredibly
On Fri, Sep 16, 2011 at 2:36 PM, Hal Murray hmur...@megapathdsl.net wrote:
x...@darksmile.net said:
You can forget Wall St. firms and Banks for starters.
They need sub-microsecond accurate timing as some instruments (Forex) are
moving to 10 microsecond latency from order entry to order
...@febo.com] On
Behalf Of Bob Paddock
Sent: Friday, September 16, 2011 7:50 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds...
On Fri, Sep 16, 2011 at 2:36 PM, Hal Murray hmur...@megapathdsl.net
wrote:
x
-
From: x...@darksmile.net
Sender: time-nuts-boun...@febo.com
Date: Fri, 16 Sep 2011 16:59:01
To: time-nuts@febo.com
Reply-To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds...
With the recent
Time Technology and leaping seconds
http://googleblog.blogspot.com/2011/09/time-technology-and-leaping-seconds.html
The solution we came up with came to be known as the “leap smear.” We
modified our internal NTP servers to gradually add a couple of
milliseconds to every update, varying over a
It's interesting to see the title *Why time matters at Google* in the blog
when Androis bug 5485 has not been fixed in over two years, and most
Android-based phones are 15 seconds fast, as GPS-disciplined rather than
UTC. It appears only Samsung got around
When hearing about this, Daniel
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