# Cloud Dataflow - [Main page](https://cloud.google.com/dataflow) # Tech thinks to remember - Dataflow allows for "Exactly once delivery" - managed service - based on [Apache Beam Runner](https://beam.apache.org/get-started/beam-overview/) - Stream processing - SQL, Python, Java - Comes with a lot of template to move data - Concepts of jobs that are executions of particular Dataflow program - Dataflow shows graphs of execution ## use cases - ETL - Complex processing otherwise use [[Cloud Data Fusion]] for ETL or [[Cloud Pub_Sub]] for messaging - At row level