HP StorageWorks Clustered File System 3.1.1p1 Linux Edition Upgrade Guide (February 2006)

Rolling Upgrade Procedure

This chapter describes how to upgrade HP Clustered File System in a

single rolling upgrade. For upgrades from HP Clustered File System 3.0.0

and 3.0.1, all servers must first be upgraded to the HP Clustered File

System 3.1.0p1 64-bit version.

The procedures do 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 to the HP

Clustered File System 3.1.1p1 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. (This is a change in order from previous

HP Clustered File System upgrades.)

If a server is accidentally upgraded out of order, when a higher-

number server joins the cluster, the servers still running the old

version of HP Clustered File System will think they need to leave the

cluster and will no longer send configuration and status updates. To

correct this problem, stop HP Clustered File System on the node that

was upgraded out of order. Continue upgrading the other nodes

before starting HP Clustered File System on that node.