Best approach for scalable PHP-based chat system (based on AJAX)

Question

I am creating a chat system for a company and I wonder what is the best way to create a system?

The current setup we have is a Nginx HTTP server with PHP and Memcacheq (as a message queue that adds chat messages to the user's own queue). Then we poll the Nginx server (via a Comet style request) and request a message queue for updates.

Is it good to use a message queue, such as Memcacheq, to ​​handle a chat system that has both user and public chat, or is it best to just stick to MySQL?

Thank!

Answer 1

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Answer 2

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Answer 3

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Answer 4

: http://pushmodule.slact.net/. Nginx , php- HTTP- .