Airflow Xcom Exclusive _best_

AIRFLOW__CORE__XCOM_BACKEND=path.to.your.module.S3XComBackend Use code with caution. 4. Exclusive Production Optimization Design Patterns

process_customer_count(sql_task.output)

Apache Airflow XComs should be reserved exclusively for small metadata pointers, such as S3 keys or row IDs, to prevent metadata database bottlenecks. For large data transfers, utilizing custom XCom backends for object storage like S3 or GCS is recommended to optimize DAG performance. Read more on best practices at Astronomer Documentation Apache Airflow XComs — Airflow 3.2.0 Documentation airflow xcom exclusive

Modern Airflow (2.0+) makes XCom seamless. AIRFLOW__CORE__XCOM_BACKEND=path

: Pass task_ids to ensure you only get data from a specific upstream source. airflow xcom exclusive