Installation and Upgrade Guide > Preparing for Installation > Tracking and Documenting Your Install or Upgrade
 
Tracking and Documenting Your Install or Upgrade
We recommend that you document the issues that you encounter during an upgrade and document all customizations made to your new TDV system, to help ensure that your next upgrade goes smoothly.
Before beginning your install, be aware that Java and PostgreSQL customizations are not preserved through the installation process. After install you must redo the customizations.