Amazon Elastic MapReduce (Amazon EMR): "Amazon Elastic MapReduce automatically spins up a Hadoop implementation of the MapReduce framework on Amazon EC2 instances, sub-dividing the data in a job flow into smaller chunks so that they can be processed (the “map” function) in parallel, and eventually recombining the processed data into the final solution (the “reduce” function). Amazon S3 serves as the source for the data being analyzed, and as the output destination for the end results.
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'via Blog this'
