In this chapter, we focused on common SQL components that are used in the Hadoop ecosystem. We also covered the architecture of Hive, Presto, and Impala. Then, we discussed the best practices when using these tools.
In the next chapter, we will focus on the processing engines we use to process huge amounts of data. We will focus more on internal architecture and the in-depth workings of each component. We will also cover a few examples that will help you design your own application.