In Airflow, each task has access to an XCOM object, which is used to store and retrieve data. When a task wants to share data with another task, it can use the xcom_push method to store the data in the XCOM object. The data is then available for other tasks to retrieve using the xcom_pull method.
XCom Airflow is a powerful feature that enables cross-communication between tasks, making it easier to build efficient, reliable, and scalable workflows. By understanding how XCom works and following best practices, you can unlock its full potential and take your Airflow workflows to the next level. Whether you're building data processing pipelines, coordinating task execution, or exchanging metadata, XCom is an essential tool in your Airflow toolkit. xcom airflow
Use cloud storage (like S3 or GCS) for images, models, or large binaries, and only pass the path via XCom. Advanced Feature: Custom XCom Backends In Airflow, each task has access to an
| Aspect | XCom | |--------|------| | Purpose | Small data exchange between tasks | | Storage | Airflow metadata DB | | Max size | ~1 MB (configurable) | | Best for | Paths, flags, counts, JSON | | Avoid | DataFrames, large files, images | | Alternative for large data | S3/GCS + pass reference | XCom Airflow is a powerful feature that enables