Zero downtime upgrade (blue/green upgrade)

• Zero Downtime Upgrade is the preparation of a duplicate database and installation of the new version of an application in the duplicate database with continuous user data synchronization. Once the database is upgraded and is in sync, the users can be switched to the new version.
• Repstance allows the replication of data between databases having different structures.
• Repstance supports various types of transformations with the ability to customize the data and database objects being processed in order to support the new version logic.

Zero downtime upgrade is different from Zero downtime migration because target database can have a new version installed and schema definitions may also be different, by using transformation Repstance will be able to modify the statements to meet new version requirements.