NoSQL datastores are moving to the forefront because they solve the problem of scalability on a massive scale. Schemaless datastores are fundamentally different from traditional relational databases, but leveraging them is easier than you might think.
Now that you have the basics of NoSQL down, it's time to explore some of the more popular datastores. Get a hands-on introduction to MongoDB, CouchDB, and Amazon's SimpleDB, as well as Google AppEngine's multiple storage options.
A key enabling technology of the big data revolution is MapReduce: a programming model and implementation developed by Google for processing massive-scale, distributed data sets. Explore Apache Hadoop, an open source MapReduce implementation that plays a major role in IBM's approach to big data analysis.
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