Didier... That's a trivial distinction to me; 5 days in either direction is simply a form of highway robbery legalized by the government.
As for still writing checks, Magnus, there are still cases where that is the only way I will transfer large amounts of money. I love having a paper trail I can control and maintain. Tom Holmes, N8ZM Tipp City, OH EM79 > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of [email protected] > Sent: Sunday, September 18, 2011 7:33 AM > To: Time-Nuts > Subject: Re: [time-nuts] Google NTP Servers and smearing leap seconds... > > 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 :) > > Didier KO4BB > > Sent from my BlackBerry Wireless thingy while I do other things... > > -----Original Message----- > From: "Tom Holmes" <[email protected]> > Sender: [email protected] > Date: Fri, 16 Sep 2011 21:25:46 > To: 'Discussion of precise time and frequency measurement'<time- > [email protected]> > Reply-To: Discussion of precise time and frequency measurement > <[email protected]> > 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 > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] 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 <[email protected]> > > wrote: > > > > > > [email protected] 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 > > > > There are some big names in Banking and Stocks behind the > > Advanced Message Queuing Protocol (AMQP): > > > > http://www.amqp.org/confluence/display/AMQP/About+AMQP > > > > http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=amqp > > > > http://amqp.org/resources/financial-services > > > > Actually Time Nut Grade measurements are not addressed at this level > > to my knowledge. > > > > <p><b>Round Trip</b>: The term round trip refers to the > > process of a peer sending a command to its partner and > > receiving confirmation that the command is complete. Round > > trips are necessary for synchronization of world views, > > however, it is not necessary for a client to wait and do > > nothing while a round trip occurs or only deal with a single > > round trip at a time.</p> > > </li> > > > > <li> > > <p><b>Round Trip Time (RTT)</b>: The term RTT refers to the > > time taken to complete a round trip. This is described with > > the following formula:</p> > > <pre> > > RTT = 2*latency_network + latency_processing > > </pre> > > > > <p>Note that RTT at the execution layer differs from RTT at > > the network layer. At the network layer the processing > > latency is zero resulting in an RTT of twice the network > > latency. At the execution layer the processing time becomes > > significant if, for example, processing the command requires > > sending data to disk. This would be the case with durable > > messages and the RTT would then include the Broker's disk > > latency.</p> > > </li> > > > > > but I won't be surprised if they are thoroughly > > > tangled. > > > > http://www.imatix.com/articles:whats-wrong-with-amqp > > > > There is also the even more obscure 0MQ: > > > > http://www.zeromq.org/ > > > > > > > > > > -- > > http://blog.softwaresafety.net/ > > http://www.designer-iii.com/ > > http://www.wearablesmartsensors.com/ > > > >_______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
