Where to find documentation about DAG optimizations?

Question

Is there any documentation about what (and how are performed) are the optimizations that are performed when transforming the Application DAG into the physical DAG?

Answer 1

This is the "official" page of Flink Optimizer but it is awfully incomplete. I've also found other information directly in the source-code on the official github page but it is very difficult to read and understand.

Other information can be found here (section 6) (Stratosphere was the previous name of Flink before it was incubated by Apache) and here (section 5.1) for a more theoretical documentation.

I hope it will be documented better in the future :-)