![]() A diagram object is an instance of the DAG running at a given date. To trigger a DAG every day, you can use the preset There are a lot more presets available in airflow which we will see later.Ĭatchup: Each time the DAG is triggered, a diagram object is created. Airflow brings some preset cron expressions that we can use in the above case. A cron expression is a way to define the interval of times in Unix. We can do this by using a cron expression. For example, you want to trigger your DAG every 10 minutes you will specify this in the scheduled interval. Schedule_interval: scheduling interval defines the frequency of interval of time at which your DAG is triggered. There are two more additional parameters that can be really useful i.e schedule_interval and catchup. Putting the above date means that the DAG is scheduled or will start on 22nd February 2022. You have to specify a DateTime object and then add whatever date you want to put in. What is a start date? The start date is the date at which your DAG will be scheduled.Įxample: with DAG(“my_dag”, start_date=datetime(2022, 22, 2) The second parameter that we have to provide is the start date. The first one is a DAG Id which must be a unique identifier otherwise you might end up with weird behaviors. Once we have the DAG instance, we have to provide some parameters. To create the instance, we can use the context manager i.e with.
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