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eljefe6a writes "Putting some numbers and data behind the Hadoop hype took a few months of research. I ran 1, 2, 3, 4, 5, 10 and 20 node Hadoop clusters using Elastic MapReduce to check its scalability. As expected, Hadoop scales very well. I also run performance tests on EC2 instances. Then, I break down the ROI of Spot Instance market and cost per unit." Link to Original Source
Adding features does not necessarily increase functionality -- it just
makes the manuals thicker.