Upgrading Software on Clustered Controllers
This section describes how to upgrade the system software for Oracle ZFS Storage Appliance with clustered controllers. Cluster update is also referred to as a rolling update. Controllers are upgraded one at a time, and each controller is upgraded while the cluster peer provides service to clients. Clients will encounter brief periods of service interruption while cluster resources transfer between the cluster peers.
Note:
As of software release OS8.7.22 or later, configuration changes are supported on a controller that is running down-level software and has active resources while its cluster peer is being upgraded.Use the following tasks to upgrade software on clustered controllers using either the BUI or CLI: