Carsten Mönning over at the SAP Community Network has written the start of an intriguing series of blog posts on creating a Hadoop cluster with several Raspberry Pi 2s. This initial post just covers setting up Hadoop on a single Pi, and future instalments will go into further depth on getting a proper cluster set-up and interacting with it. This is an extremely useful skill to learn and I hope people follow the series as it progresses. Read the first part here.