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Tera-Tom Genius Series - Hadoop Architecture and SQL by Jason Nolander, Tom Coffing

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Chapter 1 – The Concepts of Hadoop

“Let me once again explain the rules. Hadoop Rules!”

- Tera-Tom Coffing

What is Hadoop All About?

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Hadoop is all about lower costs and better value! Hadoop leverages inexpensive commodity hardware servers and inexpensive disk storage. In all previous systems the servers were in the same location, but Hadoop allows for the servers to be scattered around the world. The disks are called JBOD (Just a Bunch of Disks) because they are just unsophisticated disks attached to the commodity hardware. This approach enables incredible capabilities while keeping costs down.

There is a Named Node and Up to 4000 Data Nodes

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