relational databases and multicast messages

Posted by xRobot on Stack Overflow See other posts from Stack Overflow or by xRobot
Published on 2010-04-30T11:06:05Z Indexed on 2010/04/30 12:17 UTC
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database

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relational-database

I have read that relational databases are a terrible way to do multicast messages like twitter.

So twitter saves every tweet only one times and then retrieve its in every stream ? or saves every tweet in every users's stream ?

I want to know why relational database ( like mysql or postgresql ) doesn't good for twitter-like application.

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