In this fifth episode of DataFriday, I will dig into the schema linked to each dataframe in Apache Spark. I will rename columns, create columns, and analyze the result. I […]
DataFriday: extracting metadata from photos
Following episode 3, where I talked about metadata in relational databases, this week, I am talking about metadata as found in digital photography (and specifically EXIF). Wikipedia defines EXIF as […]
DataFriday: what is Metadata?
In this episode, I will explain what is metadata, at least, some metadata, more specifically metadata on relational databases. It’s a quick introduction. I will also run a small Java […]
DataFriday: basic ETL ops with Apache Spark
In this episode, you will learn about doing a basic ETL (extract, transform, and load) operation using Apache Spark. You will load a basic CSV file with Apache Spark, make […]
DataFriday: load a CSV file with Apache Spark
Starting today, I will host a weekly live show about data. You may join, attend “live,” and ask questions as I go through a data-oriented topic. For now, the topic […]
Spark in Action, Second Edition MEAP Update
I just wanted to share with you the latest update on Spark in Action, second edition What’s new? Chapter 12, “Transforming your data“ Chapter 13, “Transforming entire documents“ Appendix K, […]
My trip to the Moon… and Mars (part 2)
This article follows my previous post on my trip to NASA in Langley, Va. in early March 2019. This is the second and last part of this article. Before going […]
My trip to the Moon… and Mars (part 1)
I like to use π day, to remember a few things about science and technology that influence who I am. This year, Ï€ day is perfect for that. Let me tell […]
Spark in Action’s Chapter Eleven on Working with SQL is in MEAP
A new chapter of Spark in Action, 2e, (formerly known as Spark with Java) is available. Chapter 11 is titled “Working with SQL”. In chapter 11, you will explore how […]
(Almost) All you need to know about file ingestion in Apache Spark
As you may know, I start writing Apache Spark with Java (now renamed Spark in Action, 2nd edition). Usually, as the book develops, authors share a few excerpt of the book […]