Options for Oracle Grid Infrastructure Downgrades

You can downgrade Oracle Grid Infrastructure 18c to earlier releases.

Downgrade options include the following earlier releases:

• Oracle Grid Infrastructure downgrade to Oracle Grid Infrastructure 12c Release 2 (12.2).

• Oracle Grid Infrastructure downgrade to Oracle Grid Infrastructure 12c Release 1 (12.1).

• Oracle Grid Infrastructure downgrade to Oracle Grid Infrastructure 11g Release 2 (11.2). Because all cluster configurations in Oracle Grid Infrastructure 18c are Oracle Flex Clusters, when you downgrade to Oracle Grid Infrastructure 11g Release 2 (11.2), you downgrade from an Oracle Flex cluster configuration to a Standard cluster configuration.

Note:

When you downgrade Oracle Grid Infrastructure to an earlier release, for example from Oracle Grid Infrastructure 18c to Oracle Grid Infrastructure 12c Release 2 (12.2), the later release RAC databases already registered with Oracle Grid Infrastructure will not start after the downgrade.