In this post, I’d like to show some concepts for better understanding of Apache Spark applications. Most of the content here is available in many books, blog posts, paid courses and free YouTube videos. Here, I just compiled these materials and added some important details regarding my experience. This text is divided in three sections. The first section, “Apache Spark Components Overview”, I present the basic Apache Spark components and their respective roles when executing an application, as well as the composition of an Apache Spark application. In the second section, “Actions, Transformations and Lazy Evaluation”, I discuss these three important concepts that are frequently mentioned in the first section, as well as in every text about Apache Spark. The third section is the Conclusion, where I wrap up the previous sections. ...