Streaming 101: The world beyond batch

 https://www.oreilly.com/radar/the-world-beyond-batch-streaming-101/

The Lambda Architecture: 2011 - 

http://nathanmarz.com/blog/how-to-beat-the-cap-theorem.html

Questioning the Lambda Architecture - 2014 - in favour of Kafka - 

http://radar.oreilly.com/2014/07/questioning-the-lambda-architecture.html