Choose one of the following methods to upgrade your cluster to Sun Cluster 3.1 10/03 software:
Nonrolling upgrade – In a nonrolling upgrade, you shut down the cluster before you upgrade the cluster nodes. You return the cluster to production after all nodes are fully upgraded. You must use the nonrolling-upgrade method if one or more of the following conditions apply:
You are upgrading from Sun Cluster 3.0 software.
You are upgrading from Solaris 8 software to Solaris 9 software.
Any software products you are upgrading, such as applications or databases, require that the same version of the software is running on all cluster nodes.
Rolling upgrade – In a rolling upgrade, you upgrade one node of the cluster at a time. The cluster remains in production with services running on the other nodes. You can use the rolling-upgrade method only if all of the following conditions apply:
You are upgrading from Sun Cluster 3.1 software.
You are upgrading Solaris software only to a Solaris Update release, if at all.
For any applications or databases you must upgrade, the current version of the software can coexist in a running cluster with the upgrade version of that software.
If your cluster configuration meets the requirements to perform a rolling upgrade, you can still choose to perform a nonrolling upgrade instead.
For overview information about planning your Sun Cluster 3.1 10/03 configuration, see Chapter 1, Planning the Sun Cluster Configuration.