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Data & Analytics · Intermediate

Apache Airflow

An open-source platform for authoring, scheduling and monitoring workflows as Python-defined DAGs.

Definition

Airflow uses operators and sensors for tasks, a scheduler, workers and a metadata database. Managed versions are Google Cloud Composer, Amazon MWAA and Astronomer. Airflow 3 (2025) added DAG versioning and a new UI.

Exam tip

On Google Cloud, managed Airflow = Cloud Composer; on AWS, it is MWAA.

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