Expand Contract Pattern - for Continuous Delivery of Databases

Modifying the database schema is scary. It is hard to roll back the changes if something goes wrong. But it is difficult to avoid necessary refactoring to the database.

The talk is about the Expand/Contract pattern to make significant changes to the application, in a safer and reversible manner.

Transcript

1. Expand Contract Pattern For Continuous Delivery of Databases
2. The problem With database refactoring
3. Risky And scary
4. Hard to rollback Maybe impossible?
5. Enormous impact Negative impact
6. Expand/Contract Pattern The solution
7. Small steps In a continuous way
8. Reversible Safe rollback, when issues are found
9. Safer Monitor until you gain confidence
10. Case studies
11. Making a change to the core
12. The learnings
13. The pitfalls
14. Other techniques
15. Branch by Abstraction
16. Strangler Pattern
17. Summary
18. Questions??