Is it at least possible to build Hadoop cluster from Raspberry Pi-based nodes? Can such a cluster meet hardware requirements of Hadoop? And if so, how much Raspberry Pi nodes are required to meet requirements?
I understand that a cluster from several Raspberry Pi nodes being cheap is not powerful. My purpose is to organize cluster without possibility of loosing personal data from my desktop or notebook, and to use this cluster studying Hadoop.
I'd appreciate if you suggest any better ideas of organizing a cheap Hadoop cluster for studying purposes.
UPD: I've seen that recommended amount of memory for Hadoop is 16-24GB, multi-core processors, and 1TB of HDD, but it doesn't look like minimal requirements.
UPD2: I understood that serverfault.com is a place for questions related with production systems. Questions related with configuring systems for fun and personal usage are out of scope. Sorry for asking this question.