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development:
  adapter: mysql2
  encoding: utf8
  database: my_database
  username: root
  password:

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http://answers.oreilly.com/topic/460-how-to-benchmark-a-hadoop-cluster/
http://www.michael-noll.com/blog/2011/04/09/benchmarking-and-stress-testing-an-hadoop-cluster-with-terasort-testdfsio-nnbench-mrbench/

## MR pi
sudo -u hdfs hadoop jar /opt/cloudera/parcels/CDH/lib/hadoop-0.20-mapreduce/hadoop-examples.jar pi 10 100

## terasort
sudo -u hdfs hadoop jar /opt/cloudera/parcels/CDH/lib/hadoop-0.20-mapreduce/hadoop-examples.jar teragen 1000 /user/cloudera/terasort-input
sudo -u hdfs hadoop jar /opt/cloudera/parcels/CDH/lib/hadoop-0.20-mapreduce/hadoop-examples.jar teragen 100000000 /user/cloudera/terasort-input

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#!/bin/sh

source ./control.sh

function no_hugepages() {
  echo never > /sys/kernel/mm/transparent_hugepage/enabled
  echo never > /sys/kernel/mm/transparent_hugepage/defrag
}

function verify_capacity() {