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The big site like Google, Facebook and co test their new features on a particular group of people. I wondered how he did that : both in programmation and architecture (cache ...).

--Edit-- Server side, if I several version of one function How do you do to first version of this function run on 90% of the people, the version 2 of this function to 5% and the version to 5% remaining.

Or to be most simple, if I have a version of my site operational, and 2 versions modified of site. How do ou run the three instance of site for differents persons. -- !Edit --

What Do Symfony do it ? or other framework (spring, django) ?

ekad
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Paul_ui
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  • If these don't help answer your question maybe you can add more details to your question: http://stackoverflow.com/questions/4649250/how-to-implement-a-limited-feature-rollout-language-agnostic-to-your-users or this: http://programmers.stackexchange.com/questions/148624/how-to-roll-out-a-feature-to-only-a-select-few-users – dcaswell Aug 25 '13 at 17:56
  • Thank you very much for your links. – Paul_ui Aug 25 '13 at 19:09

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