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© 2018
Apache Airflow at Dailymotion
Wednesday20th June 2018
Cédric
Hourcade
Germain
Tanguy
• Data Engineer
• Github: https://github.com/germaintanguy
• Linkedin: https://fr.linkedin.com/in/germain-tanguy
• Data Engineering Manager
• Github: https://github.com/hc
• Linkedin: https://www.linkedin.com/in/hourcade/
Agenda
• Data at Dailymotion
• Apache Airflow
• Airflow at Dailymotion
• Deployment
• Working on a DAG
• Example of a pipeline
Data at
Dailymotion
© 2018
Data at Dailymotion
the team
Data at Dailymotion
who
what
Data at Dailymotion
who
tools
Apache Airflow
© 2018
Apache Airflow
Success
Retry
Failed
• Workflowmanagement system
• Workflow is defined as a Directed Acyclic
Grah (DAG)
• Each DAG is composed by task
• Workflowis defined in Python
• Schedulable
What airflow is?
Apache Airflow
What airflow is
solving?
• Scheduling dependanttasks
• Visualizing pipeline
• Monitoring / Alerting
• Backfilling
What airflow is
not?
• Data “streaming” :
Tasks do not move data from one to the other
Workflow
Command Line Interface:
• airflow list_dags
• airflow list_tasks
• airflow trigger_dag
• airflow test
• airflow clear
• airflow backfill ...
Architecture
Celery Executor
Operator / Sensor
Operatorbuilt-in:
• PythonOperator
• BashOperator
• BigQueryToBigQueryOperator
• GcsDataFlowJavaOperator
• ShortCircuitOperator
• HTTPOperator
• ... Sensorbuilt-in:
• HivePartitionSensor
• BigQueryTableSensor
• DatadogSensor
• S3PrefixSensor
• SqlSensor
• ...
Airflow at
Dailymotion
© 2018
Deployment
Deployment at Dailymotion
Our first deployment:
the LocalExecutor
Deployment at Dailymotion
Stage Prod
Deployment at Dailymotion
Deployment at Dailymotion
~$ make run
[] starting worker...
[] starting scheduler...
[] Starting webserver...
** Airflow is ready!
airflow@7ecb6a08559c:~$ |
Dev
Airflow at
Dailymotion
© 2018
Working on a DAG
Working on a DAG
Main property : idempotence
Working on a DAG
Example on a simple case :
We want to load some files from
storage to BigQuery table on a
daily basis.
Before loading data to
production partition, we want to
verify its quality (example :
number of row more or less the
same as last week).
Working on a DAG
Working on
a new DAG
Working on a DAG
Working on
a new DAG
2
4
Working on a DAG
Airflow at
Dailymotion
© 2018
Example of a pipeline
Example of a pipeline
Presentation of one real use case : Dailymotion’s new Advanced Analytics
Goals :
• External : allowing partners to monitor theirs activities on Dailymotion, through a
serie of dashboards
• Internal : allowing internal business teams (ads op, finance, content..) to query
aggregated data via tableau
Challenges:
• Differents sources with different frequency of updated with
different timezone
• Backfill anything at anytime
• Monitor and alerting
• Solution approchable by differentdata friendly profession
Tools:
• Airflow
• BigQuery
• Exasol
• Tableau
Example of a pipeline
Presentation of one real use case : Dailymotion’s new Advanced Analytics
Workflow of a pipeline
DAG
Workflow of a pipeline
DAG
Workflow of a pipeline
DAG
Workflow of a pipeline
DAG
© 2017
Confidential
© 2018
Thank you
Cédric Hourcade et Germain Tanguy

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