HP StorageWorks Clustered File System 3.2.1 Windows Storage Server Edition Setup Guide (February 2006)

Chapter 4: Upgrade HP Clustered File System 35
Upgrade HP Clustered File System
There are three ways to perform the upgrade to HP Clustered File System
3.2.1:
• Perform a rolling upgrade. In this procedure, servers are removed
from the cluster, upgraded, and returned to the cluster one-at-a-time.
No downtime is required.
• Upgrade all servers at once. This procedure requires that the cluster be
completely shut down during the upgrade.
• Upgrade the servers in two groups. This method minimizes overall
downtime.
Perform a Rolling Upgrade
This procedure does not require any cluster downtime. Each server is
removed from the cluster, upgraded, and then returned to the cluster.
Rolling Upgrade Considerations
You should be aware of the following when upgrading HP Clustered File
System to the 3.2.1 release:
• Servers can be upgraded one-at-a-time during the rolling upgrade.
The server with the numerically highest primary IP address must be
upgraded first. Then continue to upgrade the servers in descending
order of IP address, with the server with the lowest primary IP
address being upgraded last.
• During the rolling upgrade, the cluster will include a mix of servers
running 3.2.1 and the older version. Although HP Clustered File
System supports this mix of versions during the rolling upgrade,
on-going operation of a mixed-version cluster is not supported. All
servers should be upgraded to 3.2.1 as quickly as possible.
• During the upgrade, the HP CFS Management Console will show the
version of HP Clustered File System that is currently running on the
server to which you are connected. Each server will show the
currently installed version of the operating system.