High Level Overview of Apache Spark

https://hackernoon.com/high-level-overview-of-apache-spark-c225a0a162e9
Block-diagram view of Spark.

Spark tutorial: Get started with Apache Spark

https://www.infoworld.com/article/3237984/analytics/spark-tutorial-get-started-with-apache-spark.html
Beginner's guide to Apache Spark

Starting a Business with Laravel Spark

http://www.sitepoint.com/starting-a-business-with-laravel-spark/

I did a brief overview of #pagekit at the last Atlanta Joomla meetup. Here's a micro-business addon: