Overview of Informix migration

Before you upgrade to the new version of Informix®, ensure that you understand the migration process, prerequisites, and reversion options.

The migration process
This overview of the migration process describes what you need to know to plan your migration and the resources that you can use to assist you.
Upgrading Informix (in-place migration)
In-place migration upgrades Informix directly to the current version by installing the product in a new directory on the same computer, copying a few configuration files, and starting the new server to automatically convert your database data.
Migrating Informix (non-in-place migration)
Depending on your existing database server setup, you might need to move to a new architecture or a different server. This type of migration is more complicated than in-place migration. It requires more planning and it is more time consuming.
Hardware and operating system requirements
Ensure that you meet the operating system and hardware requirements for Informix Version 12.10.
Fix pack naming conventions
Informix releases and fix packs contain version names that appear in the format aa.bb.xCn.
Paths for migration to the new version
Direct migration to Informix 12.10 is supported for specific earlier versions of the database server.

Parent topic: Overview of migration