Migration to and reversion from Version 12.10
- Preparing for migration to Version 12.10
Before you install the new version of Informix, you must prepare the database server environment for migration by performing specified pre-migration tasks. If you are also migrating from 32-bit to 64-Bit database servers, you must perform additional tasks. - Enterprise Replication and migration
You must coordinate the migration of all servers that are involved in data replication. - High-availability cluster migration
You must coordinate the migration and reversion of all servers that are involved in high-availability clusters. You can use a rolling upgrade in some cases to update servers while the cluster is online, with minimal interruption to client applications. Otherwise, you must schedule cluster downtime to upgrade the servers. A cluster must be offline to reverse an upgrade or revert to an earlier release. - Migrating to Informix Version 12.10
When you migrate to a new version of Informix, you must complete required migration and post-migration tasks. - Reverting from Informix Version 12.10
You can revert to the version of the database server from which you migrated. When you run the reversion utility, you specify the target server for reversion and then Informix checks your database. If necessary, Informix might tell you to drop new objects, before automatically converting your data into the target server.
Parent topic: Migrating Informix database systems