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Batch Execution Mode in Flink’s DataStream API

Dawid Wysakowicz takes us through batch execution mode in a streaming solution:

Flink has been following the mantra that Batch is a Special Case of Streaming since the very early days. As the project evolved to address specific uses cases, different core APIs ended up being implemented for batch (DataSet API) and streaming execution (DataStream API), but the higher-level Table API/SQL was subsequently designed following this mantra of unification. With Flink 1.12, the community worked on bringing a similarly unified behaviour to the DataStream API, and took the first steps towards enabling efficient batch execution in the DataStream API.

Read on to see the progress they’ve achieved so far.