5 Upgrading Oracle Database Using Parallel Upgrade Utility or Replay Upgrade

You can upgrade manually by using the Parallel Upgrade Utility command-line option, or you can use the Replay Upgrade process.

Starting with Oracle Database 21c, Database Upgrade Assistant (DBUA) is replaced by the AutoUpgrade utility.

Caution:

If you retain the old Oracle Database software, then never start the upgraded database with the old Oracle Database software. Only start the database with the executables in the new Oracle Database installation.

• Upgrading Manually with Parallel Upgrade Utility
  To run upgrades with scripts that you run and manage manually, you can use the Parallel Upgrade Utility (catctl.pl).
• Manual Upgrade Scenarios for Multitenant Architecture Oracle Databases
  To prepare for manual upgrades, review the manual upgrade scenarios and procedures for Oracle Database deployed with multitenant architecture.
• About Transporting and Upgrading a Database (Full Transportable Export/Import)
  You can use file-based or nonfile-based modes for transporting data.
• Upgrading Oracle Database Releases Using Replay Upgrade
  To upgrade from an earlier release, you can use the Oracle Multitenant Replay Upgrade (Replay Upgrade) procedure to adopt a non-CDB to a PDB, or upgrade a PDB.
• Manual Non-CDB Oracle Database Release Upgrades to Multitenant Architecture
  To manage your non-CDB Oracle Database upgrade manually by using scripts, learn about upgrade scenarios and procedures.
• Upgrading Oracle Database Using Fleet Patching and Provisioning
  In Oracle Database 12c release 2 (12.2) and later releases, you can use Fleet Patching and Provisioning to upgrade an earlier release Oracle Database.
• Rerunning Upgrades for Oracle Database
  Use these options to rerun upgrades.