1. Apache Hadoop. Available at: http://hadoop.apache.org/. Apache Hadoop. Available at: http://hadoop.apache.org/.
2. Ganglia Monitoring System. Available at: http://ganglia.sourceforge.net/. Ganglia Monitoring System. Available at: http://ganglia.sourceforge.net/.
3. HDFS Architecture Guide. Available at: https://hadoop.apache.org/docs/r1.2.1/hdfs_design.html. HDFS Architecture Guide. Available at: https://hadoop.apache.org/docs/r1.2.1/hdfs_design.html.
4. Tiger Data Set. Available at: http://www.census.gov/geo/www/tiger/. Tiger Data Set. Available at: http://www.census.gov/geo/www/tiger/.
5. World Wide Lightning Location Network. Available at: http://wwlln.net/. World Wide Lightning Location Network. Available at: http://wwlln.net/.