I want to asynchronously send updates to all logged in users when some 
event happens(events like user pressing a buzzer).
Polling for updates for every client after a fixed time interval will 
unnecessarily burden the server.
I found this app which does asynchronous server side updates using 
javascript. (Link of app on http://osdir.com/ml/web2py/2012-09/msg00937.html
 )
It is a clock with server side updates triggered after every 5 seconds.
However I would like to trigger updates on user based events without 
polling.

-- 
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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