MapReduce programming system in java-actionscript

Just fini开发者_运维知识库shed reading ch23 in the excellent 'Beautiful Code' http://oreilly.com/catalog/9780596510046

on Distributed Programming with MapReduce. I understand that MapReduce is a programming system designed for large-scale data processing problems, but I have a hard time getting my head around the basic examples given and how I might apply them in real world situations.

Can someone give a simple example of MapReduce implemented using either java, javascript or actionscript?

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For further information on MapReduce i would recommend you spend some time on the following topics:

• Apache Hadoop
• MongoDB mapreduce features
• Patterns For Cloud Computing

You can experiment with MongoDB for starters (http://www.mongodb.org/display/DOCS/MapReduce)

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GridGain is another MapReduce framework for Java which I find a lot easier to grasp than Hadoop.

Have a look at the examples in http://www.gridgainsystems.com/wiki/display/GG15UG/Examples+Gallery