This chapter concludes the projects presented in this book. Here we learned how to use the Raspberry Pi with a USB HDD. We also explored building a case using Lego. As a follow up to this, the Appendix provides you with a number of resources for purchasing Raspberry Pi cases or 3D-printing custom cases.
Following building a case, we explored writing another MPI-based application, this time using the Fortran programming language.
Finally we provided some ideas for alternative power sources for your Raspberry Pi cluster and some links to resources that discuss those.
The projects from this chapter, combined with those from across the rest of this book, have provided you with the basic tools needed to explore the topic of Parallel Computing further. You should now be familiar with MPI and Hadoop. You have also gained a solid understanding of how to build a new node and how to add it to your cluster.
We now leave it to you, the reader, to take the next steps in this exciting area of computing...