Let's get a little bit deeper into how Spark works. We're going to talk about Resilient Distributed Datasets, known as RDDs. It's sort of the core that you use when programming in Spark, and we'll have a few code snippets to try to make it real. We're going to give you a crash course in Apache Spark here. There's a lot more depth to it than what we're going to cover in the next few sections, but I'm just going to give you the basics you need to actually understand what's going on in these examples, and hopefully get you started and pointed in the right direction.
As mentioned, the most fundamental piece of Spark is called the Resilient Distributed Dataset, an RDD, and this is going to be the object that you use to actually load and transform and get the answers you want out of the data...
