Appendix C. Resources: where to go for more
C.1. Spark
The number of books on Spark finally started growing in 2015—six years after Spark development first began. But Spark development is still moving fast, and the best resources are online.
Apache mailing lists
As with any open source project, especially one from Apache, the mailing lists are the best sources of information, and subscribing to them—and asking questions when you can’t find answers on the web—should be considered the minimum you have to do. The mailing lists are known as user@spark.apache.org and dev@spark.apache.org. You can subscribe to them from https://spark.apache.org/community.html.
Databricks forums
Databricks is the commercialization of Spark that offers a commercial ...
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