As someone else who's also built a cluster of Pi 2s, I would agree that the primary purpose is education and fun/tinkering, not performance. That being said, f

As someone else who's also built a cluster of Pi 2s, I would agree that the primary purpose is education and fun/tinkering, not performance. That being said, for light web hosting purposes, a cluster of six Pi 2s performs roughly 70% as well as a similar cluster of 6 VMs on Digital Ocean. See more on this project's wiki, in the performance/benchmarking section: https://github.com/geerlingguy/raspberry-pi-dramble https://github.com/geerlingguy/raspberry-pi-dramble