Minimal downtime upgrade limitations
The following limitations primarily describe not tampering with configurations or service groups during the minimum downtime upgrade.
-
While you perform the upgrades, do not choose any configuration options.
-
While you perform the upgrades, do not start any modules.
-
When you start the installer, only select VCS.
-
While you perform the upgrades, do not add or remove service groups to any of the nodes.
-
Depending on your configuration, you may find that you cannot upgrade multiple nodes at the same time. You may only be able to upgrade one node at a time.
-
For very large clusters, you might have to repeat these steps multiple times to upgrade your cluster.
