[time-nuts] Google NTP Servers and smearing leap seconds...

[shalimr9 at gmail.com]

Good point, I did not keep a link to that article, so I can't check now but you are most likely correct. The article made reference to an unnamed hedge fund manager who made the statement.

The part that is the most upsetting to me is how far we as a society have gone astray with speculation and money games, instead of using the stock market for what it was originally intended.

If you are going to invest your money in a productive way, you have to keep it in a company long enough for that company to design products and put them in the market. How could a millisecond have any effect whatsoever?

Didier KO4BB
 
Sent from my BlackBerry Wireless thingy while I do other things...

-----Original Message-----
From: Javier Herrero <jherrero at hvsistemas.es>
Sender: time-nuts-bounces at febo.com
Date: Sat, 17 Sep 2011 00:25:20 
To: <time-nuts at febo.com>
Reply-To: Discussion of precise time and frequency measurement
	<time-nuts at 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, shalimr9 at gmail.com escribió:
> I just read they were building a new transatlantic cable that will shave 10uS from the normal 60 or so uS and that for large traders, 1uS represents 100 million $ per year saving/increased revenue.
>
> Didier KO4BB
>
> Sent from my BlackBerry Wireless thingy while I do other things...
>
> -----Original Message-----
> From: xaos at darksmile.net
> Sender: time-nuts-bounces at febo.com
> Date: Fri, 16 Sep 2011 13:05:40
> To: Discussion of precise time and frequency measurement<time-nuts at febo.com>; Hal Murray<hmurray at megapathdsl.net>
> Reply-To: Discussion of precise time and frequency measurement
> 	<time-nuts at 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 that
> everyone uses multiple stratum 1 NTP servers using GPS in their
> datacenters.
>
> So the Forex transaction goes like this:
>
> 1. (Both parties) Are we in proper sync timewise?
> 2. (Party 1) I need transaction type x. My timestamp is: xxxx.xxxx. Go.
> 3. (PArty 2) Confirmed. My timestamp is: yyyy.yyyy. Go.
>
> These timestamps are legal entities and bind both parties to the transaction.
> That's why transactions have a data transfer entity in the middle
> (Reuters, Bloomberg) which guarantees proper timesync for all involved.
>
> With Reuters in the middle, only the Reuters timestamp (arrival time
> and send time) can be trusted.
>
> However, Many times you will see a Reuters machine lose sync and the
> UNIX SA's will restart NTP on it. Reuters puts more than one machine
> per site for redundancy.
>
> Quoting Hal Murray<hmurray at megapathdsl.net>:
>
>>
>> xaos at 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 has
>> to be.
>>
>> Does anybody have a good URL on the accuracy requirements of banks and/or
>> stock markets?  I expect there are both legal and technical issues.  I'd like
>> to understand them separately but I won't be surprised if they are thoroughly
>> tangled.
>>
>> --
>> These are my opinions, not necessarily my employer's.  I hate spam.
>>
>>
>>
>>
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>
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