Comments on: How real-time does real-time have to be? http://www.leggetter.co.uk/2009/12/09/how-real-time-does-real-time-have-to-be.html Real-Time Web, Real-Time Data and Social Media Software and Technology Evangelist and Consultant Fri, 27 Jan 2012 15:26:51 +0000 hourly 1 http://wordpress.org/?v= By: Marriage, Work/life integration, real-time web technology evangelism & Kwwika: A retrospective of my 2010 | Phil Leggetter - Real-Time Web Software and Technology Evangelist http://www.leggetter.co.uk/2009/12/09/how-real-time-does-real-time-have-to-be.html/comment-page-1#comment-9680 Marriage, Work/life integration, real-time web technology evangelism & Kwwika: A retrospective of my 2010 | Phil Leggetter - Real-Time Web Software and Technology Evangelist Fri, 07 Jan 2011 02:21:49 +0000 http://www.leggetter.co.uk/?p=591#comment-9680 [...] Vaynerchuk’s Crush It! Why Now is the Time to Cash in on your passion as part of going to an event. There were a number of reasons why I liked this book and why it hit home. It wasn’t the [...] [...] Vaynerchuk’s Crush It! Why Now is the Time to Cash in on your passion as part of going to an event. There were a number of reasons why I liked this book and why it hit home. It wasn’t the [...]

]]> By: How does Google Real-Time Search work? | Phil Leggetter - Software Consultant http://www.leggetter.co.uk/2009/12/09/how-real-time-does-real-time-have-to-be.html/comment-page-1#comment-4312 How does Google Real-Time Search work? | Phil Leggetter - Software Consultant Sat, 12 Dec 2009 14:18:30 +0000 http://www.leggetter.co.uk/?p=591#comment-4312 [...] How real-time does real-time have to be? [...] [...] How real-time does real-time have to be? [...]

]]> By: Phil Leggetter http://www.leggetter.co.uk/2009/12/09/how-real-time-does-real-time-have-to-be.html/comment-page-1#comment-4294 Phil Leggetter Fri, 11 Dec 2009 18:32:30 +0000 http://www.leggetter.co.uk/?p=591#comment-4294 <p>Good post <a href="http://scrambledup.blogspot.com/2009/12/word-of-mouth-is-on-steroids.html" rel="nofollow">here</a>, including a video of Gary Vaynerchuk at the Sprouter event, by <a href="http://www.iansanders.com/" rel="nofollow">Ian Sanders</a> on Word of Mouth which goes hand-in-hand with Small Town Rules.</p> <p><a href="http://scrambledup.blogspot.com/2009/12/word-of-mouth-is-on-steroids.html" rel="nofollow">http://scrambledup.blogspot.com/2009/12/word-of-mouth-is-on-steroids.html</a></p> Good post here, including a video of Gary Vaynerchuk at the Sprouter event, by Ian Sanders on Word of Mouth which goes hand-in-hand with Small Town Rules.

http://scrambledup.blogspot.com/2009/12/word-of-mouth-is-on-steroids.html

]]> By: Mike http://www.leggetter.co.uk/2009/12/09/how-real-time-does-real-time-have-to-be.html/comment-page-1#comment-4252 Mike Wed, 09 Dec 2009 10:30:01 +0000 http://www.leggetter.co.uk/?p=591#comment-4252 I think it entirely depends on the application. For real-time search probably every 20 seconds is good enough. Although it could be more often this would substantially increase network traffic so the trade-off may not be worth it. In financial trading applications (with which you and I are both familiar) milliseconds, and increasingly microseconds, count: to be truly real time the trading system needs to be located in close proximity to the exchange - the speed of light (or at least the speed of electricity down a wire) becomes the limiting factor on how fast you can get the data. But then for the EU Markets in Financial Instruments Directive (MiFID), the reporting requirement was "as near real-time as possible and in any case within three minutes". Three minutes! For a professional trader that's an eternity, but for the regulator, and for most retail investors, that's real-time enough. I think it entirely depends on the application. For real-time search probably every 20 seconds is good enough. Although it could be more often this would substantially increase network traffic so the trade-off may not be worth it.
In financial trading applications (with which you and I are both familiar) milliseconds, and increasingly microseconds, count: to be truly real time the trading system needs to be located in close proximity to the exchange – the speed of light (or at least the speed of electricity down a wire) becomes the limiting factor on how fast you can get the data.
But then for the EU Markets in Financial Instruments Directive (MiFID), the reporting requirement was “as near real-time as possible and in any case within three minutes”. Three minutes! For a professional trader that’s an eternity, but for the regulator, and for most retail investors, that’s real-time enough.

]]>