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Airflow & DAGs · Architecture & Scalability

What is the Triggerer?

Mediumairflow-20
triggererdeferrablesensors

Question

What is the Airflow Triggerer?

Solution

The Triggerer efficiently handles deferrable operators.

A traditional sensor waiting 3 hours can occupy a worker slot doing nothing. A deferrable task can:

Worker starts → Defers → Triggerer waits → Condition met → Worker resumes

That frees worker capacity for real work.

Interview tip: Triggerer + deferrable sensors = scalable waiting.

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