Hello Squirrels! Flink committer Fabian Hueske has written a very nice article about joins in Apache Flink.
The article talks about joins in the APIs, the join algorithms, memory management, and performance experiments on a small cluster. A good read for everyone with SQL/ETL-style use cases and for those who are interested to learn more about how Flink works. http://flink.apache.org/news/2015/03/13/peeking-into-Apache-Flinks-Engine-Room.html Have fun reading!