Upgrading to Oracle Database 12c

Tim Warnertimwarnertech.com

@TechTrainerTim

Overview: Upgrading to Oracle Database 12c

Comparing upgrade to migration

Upgrading Grid Infrastructure is it possible?

Running the pre-upgrade information tool

Understanding impacts on multi-tenancy

Performing a direct upgrade using the Database Upgrade Assistant (DBUA)

Upgrade vs. Migration

According to Oracle, upgrade refers to modifying the data dictionary to be compatible with a newer version of Oracle Direct upgrade (new instance, overwrite existing DB)

Indirect upgrade (stepwise upgrade)

Migration involves copying or moving the user data from the source database into another database with a higher version number

Supported Upgrade Paths to Oracle Database 12c

Performing a Direct Upgrade

Oracle Grid Infrastructure 12c has an upgrade option

You have the opportunity to upgrade an existing database during Oracle Database 12c instance creation

Database Upgrade Assistant (DBUA)

Manually run upgrade scripts

The Pre-Upgrade Information Tool

A .sql script that analyzes your source database prior to your actually performing the direct upgrade

Creates a fixup script depending upon the results of the scan

Run the following two files on the target system: preupgrd.sql

utluppkg.sql

SQL> @$ORACLE_HOME/rdbms/admin/preupgrd.sql

The fixup scripts and log file are created in the /preupgrade directory of the source database

Performing a Data Migration

Export and import tablespaces using the transportable tablespace feature

Oracle Data Pump Export and Import using dump files or network mode

Well cover these methods in another Pluralsight course

What About Multi-Tenancy?

Caveat: The CDB must be a separate

instance

Caveat: The databases must have

compatible features, settings, character

sets, etc.

After you upgrade your database to 12c, you can simply plug it

into a CDB

PresenterPresentation NotesA nice way to break up the monotony of regular text slide content. Relevant visual can go above the text. But dont feel like you force a visual on every slide.

Summary

Undo data is crucial for rollback, read consistency and Flashback operations

Oracle manages most Undo settings by default

We can also let Oracle make spacemanagementsuggestions

Upgrading to Oracle Database 12cOverview: Upgrading to Oracle Database 12cUpgrade vs. MigrationSupported Upgrade Paths to Oracle Database 12cPerforming a Direct UpgradeThe Pre-Upgrade Information ToolPerforming a Data MigrationWhat About Multi-Tenancy?Summary