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Can someone explain in simple terms to me what a directed acyclic graph . . . 6 A DAG is a graph where everything flows in the same direction and no node can reference back to itself Think of ancestry trees; they are actually DAGs All DAGs have Nodes (places to store data) Directed Edges (that point in the same direction) An ancestral node (a node without parents) Leaves (nodes that have no children) DAGs are different
python - How to Run a Simple Airflow DAG - Stack Overflow I am totally new to Airflow I would like to run a simple DAG at a specified date I'm struggling to make difference between the start date, the execution date, and backfilling And what is the com
DAG marked as success if one task fails, because of trigger . . . - airflow However, since end is the last task and succeeds, the DAG is always marked as SUCCESS How can I configure my DAG so that if one of the tasks failed, the whole DAG is marked as FAILED? Example to reproduce import datetime from airflow import DAG from airflow operators bash_operator import BashOperator from airflow utils import trigger_rule dag
Airflow: how to force reparse of DAG definition file Is there a way to force a reparse of a DAG definition file in Airflow? How about all DAG definition files? First, you can use dag-processor command to manually parse all the files, the files in a subfolder or a specific dag file:
Apache Airflow: Delay a task for some period of time I am trying to execute a task after 5 minutes from the parent task inside a DAG DAG : Task 1 ----> Wait for 5 minutes ----> Task 2 How can I achieve this in Apache Airflow? Thanks in advance
How DAG works under the covers in RDD? - Stack Overflow The DAG scheduler will then submit the stages into the task scheduler The number of tasks submitted depends on the number of partitions present in the textFile Fox example consider we have 4 partitions in this example, then there will be 4 set of tasks created and submitted in parallel provided there are enough slaves cores
Running airflow tasks dags in parallel - Stack Overflow Not subdags Airflow uses a Backend database to store metadata Check your airflow cfg file and look for executor keyword By default Airflow uses SequentialExecutor which would execute task sequentially no matter what So to allow Airflow to run tasks in Parallel you will need to create a database in Postges or MySQL and configure it in airflow cfg (sql_alchemy_conn param) and then change