Ingres 9.2 Migration Guide - Actian

How You Practice the UpgradeHow You Practice the UpgradeYou should run a trial upgrade as early as possible in the conversion cycle.Ideally, trial upgrades should be run more than once. Doing so helps identifyand isolate problems, and also supplies timing data, which will be useful whenthe production system is upgraded.A simplified upgrade process is as follows:1. Run a trial upgrade.2. Take notes on what went wrong or what should be done differently.3. Continue running trial upgrades until no more problems are encountered.4. Give the annotated upgrade procedure to someone who can verify theupgrade plan.Note: Perform at least one of the trial upgrades on a full live data set, whichwill give an indication of how long the upgrade will take. This is particularlyimportant when doing an unload/reload upgrade.Creating a New Ingres Development Environment 41