Summary
Drupal’s Migrate system provides a standard ETL-based framework used for one-time and ongoing migrations. The ETL is implemented through YAML file definitions, source/processing/destination plugins, and common tools to run, roll back, and view the status of migrations. Modules can be developed to extend the out-of-the-box plugins and harness Migrate’s event system for custom processing. The Migrate system helps address use cases where an existing CMS needs to be moved to a Drupal application, or periodic processing of web service feeds.
The next chapter covers multisite management in Drupal, which can be helpful to run multiple sites from the same code base.
