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Migrating and upgradingYou can upgrade to the 14.10 release of HCL Informix® or migrate from other database servers to Informix®. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the Informix® database server can affect upgrading from a previous release.
Migrating Informix® database systemsThe Informix® Migration Guide describes how to move data manually between databases, servers, and computers.
Migration to and reversion from 14.10
Reverting from Informix® Version 14.10You 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.
Preparing to revertIf you used Version 14.10, you must prepare your system for reversion to the pre-migration version of the database server.
Save copies of the current configuration filesSave copies of the ONCONFIG and concsm.cfg files for when you migrate to Informix® Version 14.10 again.

Save copies of the current configuration files

Save copies of the ONCONFIG and concsm.cfg files for when you migrate to Informix® Version 14.10 again.

Informix uses the concsm.cfg file to configure CSMs.

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