Before summing up this chapter, and the last for cloud-based Apache Spark usage in Databricks, I wanted to mention some resources for gaining extra information on both, Apache Spark, and Databricks. First, there is the Databricks forum available at: forums.databricks.com/ for questions, and answers related to the use of https://databricks.com/. Also, within your Databricks instance, under the Workspace menu option, there will be a Databricks guide that contains a lot of useful information. The Apache Spark website at http://spark.apache.org/ also contains a lot of useful information, as well as module-based API documentation. Finally, there is the Spark mailing list, <[email protected]>, which provides a great deal of Spark usage information, and problem solving.