Previous migrations of Oracle Enterprise Manager left a DBA with no fallback position and extensive outage periods for the actual upgrade. Oracle Enterprise Manager 12c has been completely rewritten that includes a comprehensive step-by-step method of safely upgrading including a pre-defined fallback method to revert to. Best practices on using the new Pre-Upgrade Console to validate your existing Grid Control install and insure a error-free migration to 12c. The three different methods of upgrading will be covered with suggestions on how to migrate depending on your technical requirements.
Upgrading to Oracle Enterprise Manager 12c – Best Practices
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