Chapter 9: Advanced Continuous Delivery

1.  Database schema migration is a process of incremental changes to the relational database structure.
2.  Flyway, Liquibase, Rail Migrations (from Ruby on Rails), Redgate,  Optim Database Administrator.
3.  Backwards-compatible and non-backwards-compatible.
4. If one database is shared between multiple services, then each database change must be compatible with all services, which makes changes very difficult to make.
5.  Unit tests do not require preparing any special data; data is in the memory and prepared by developers; integration/acceptance tests require preparing special data which is similar to the production.
6. parallel
7. Build parameters and shared libraries.
8. input
9. Rolling updates, blue-green deployment, and canary release.