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Concepts

Here you can find detailed documentation about each one of Airflow's core concepts and how to use them, as well as a high-level architectural overview.

Architecture

• Architecture Overview
  • Workloads
  • Control Flow
  • User interface

Workloads

• DAGs
  • Declaring a DAG
  • Loading DAGs
  • Running DAGs
  • DAG Assignment
  • Default Arguments
  • The DAG decorator
  • Control Flow
  • Dynamic DAGs
  • DAG Visualization
  • DAG & Task Documentation
  • SubDAGs
  • Packaging DAGs
• DAG Dependencies
• Tasks
  • Relationships
  • Task Instances
  • Timeouts
  • SLAs
  • Special Exceptions
  • Zombie/Undead Tasks
  • Executor Configuration
• Operators
  • Jinja Templating
• Sensors
• Deferrable Operators & Triggers
  • Using Deferrable Operators
  • Writing Deferrable Operators
  • High Availability
  • Smart Sensors
• Smart Sensors
  • Enable/Disable Smart Sensor
  • Support new operators in the smart sensor service
• TaskFlow
  • History
• Executor
  • Executor Types
• Scheduler
  • Triggering DAG with Future Date
  • Running More Than One Scheduler
  • Fine-tuning your Scheduler performance
• Pools
• Timetables
• Priority Weights
• Cluster Policies
  • Examples
  • Task policies
  • Task instance mutation

Communication

• XComs
  • Custom Backends
• Variables
• Connections & Hooks
  • Hooks
  • Custom connections
• Params

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