All of the approaches to data wrangling that have been covered in this book are good for processing datasets that are sufficiently small. Once datasets reach a certain size, however, a different approach may be required. For even larger collections of data, data mining techniques may be more appropriate.

In this chapter, I will discuss the approaches to working with datasets that are not too big to be processed on a single computer, but are too big to be read into memory all at once. I will discuss computer memory and introduce databases as a means of storing data. This chapter will include the following sections:

• Logistical Overview
• Understanding computer memory
• Understanding databases
• Introducing MongoDB
• Interfacing with MongoDB from Python