HP Tru64 UNIX Version 5.1B-2 and Higher Patch Kit Installation Instructions (March 2009)

• Two mechanisms that support rolling upgrades: tagged files (“Tagged Files”) and version
switches (“Version Switch”)
• Rolling upgrade and layered products (“Rolling Upgrade and Layered Products”)
• Rolling upgrade and RIS (“Rolling Upgrade and RIS”)
Figure 4-1 “Rolling Upgrade Flow Chart” provides a simplified flow chart of the tasks and stages
that are part of a rolling upgrade initiated on a Version 5.1B cluster:
Figure 4-1 Rolling Upgrade Flow Chart
Rolling Upgrade Supported Tasks
The tasks that you can perform during a rolling upgrade depend on which versions of the base
operating system and cluster software are currently running on the cluster. The main focus of
this chapter is to describe the behavior of a rolling upgrade that starts on a TruCluster software
Version 5.1B cluster. However, because you may read this chapter in preparation for a rolling
upgrade from TruCluster software Version 5.1A to Version 5.1B, we point out rolling upgrade
differences between the two versions.
The following list describes the basic tasks you can perform within a rolling upgrade:
• Upgrade the cluster's Tru64 UNIX base operating system and TruCluster software software.
You perform this type of rolling upgrade to upgrade from the installed version to the next
version.
When performing a rolling upgrade of the base operating system and cluster software, you
can roll only from one version to the next version. You cannot skip versions.
46 Patching a Cluster