A common gotcha when working with airflow is to determine when a DAG is going to execute, and what the execution date-time is going to be when it executes. Especially if a DAG relies on processing data for a given execution date-time only to ensure idempotency. The best way to think about this is not in dates or timestamps but time-spans. An Airflow DAG run is going to cover a times-span - i.e. it is going to process data that was generated/received/added etc. in a given time-span. Continue reading..
During the emergence of electronic communication, the two scientists/engineers Carl Friedrich Gauss and Wilhelm Eduard Weber built the first electrical communications line in Goettingen, Germany. They set up a two kilometer two wire copper line between Gauss' workplace – the Astronomical Observatory – and Weber’s laboratory in the physics department of the Goettingen University. Continue reading..
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