# Cloud Composer - [Main page](https://cloud.google.com/composer) # Tech thinks to remember - Based on Apache Airflow - Managed services - Pipeline orchestration for complex interactions - using Directed Acyclic Graphs (DAGs) - collection of tasks with dependencies - python scripts - Blocks: - Tasks - Operators - define how task with run - action to execute a software - transfer to move data - sensor - Hooks - to connect to 3rd party services - Plugins - combination of hook and operator - Deployed using various GCP services and K8S [link](https://cloud.google.com/composer/docs/composer-2/environment-architecture)  - Division in a customer project and a tenant project - customer project(s) is to run the *real stuff* - [[Cloud Storage]] - [[Google Kubernetes Engine]] - Redis - tenant project is for admin tasks - [[Cloud SQL]] - [[App Engine]] Flex ## Use case - For large ETL projects