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Online SQL schema migration examples
This document links to several examples implementing online SQL schema migrations to facilitate simultaneously running OpenStack services in different versions with the same DB schema.
- Nova data migration example
- Nova data migration enforcement example of sqlalchemy migrate/deprecated scripts
- Nova flavor migration spec example of data migrations in the object layer
- Cinder online schema upgrades spec example of migrating a column to a many-to-many relation table
For documentation on how to make online migrations move on to Database Schema Migrations <online-migration>.