Oct 07, 2013

How is data stored in the Hadoop Distributed File System (HDFS)?

How is data stored in Hadoop Distributed File System (HDFS)?
Hadoop: What It Is And How It Works

"You can't have a conversation about Big Data for very long without running into the elephant in the room: Hadoop. This open source software platform managed by the Apache Software Foundation has proven to be very helpful in storing and managing vast amounts of data cheaply and efficiently.

But what exactly is Hadoop, and what makes it so special? Basically, it's a way of storing enormous data sets across distributed clusters of servers and then running "distributed" analysis applications in each cluster.

It's designed to be robust, in that your Big Data applications will continue to run even when individual servers — or clusters — fail. And it's also designed to be efficient, because it doesn't require your applications to shuttle huge volumes of data across your network."

Yahoo, of all places, has a solid tutorial on the Hadoop Distributed File System (HDFS). You can access it here:  http://developer.yahoo.com/hadoop/tutorial/module2.html


if u r working on hadoop can u tell me the diff between hadoop and mongodb? means is hadoop a database?

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