Dave Elkins

http://pivotallabs.com/users/steve/blog/articles/746-inspect-running-ruby-processes-using-xray-and-kill-3

This is great when you need to figure out what a ruby process is doing and adds more visibility what is happening in real time.

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An interesting article about how FriendFeed uses battled tested technology (MySQL) in new and innovate ways to meet their needs.
http://bret.appspot.com/entry/how-friendfeed-uses-mysql

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