HP Serviceguard Version A.11.20 Release Notes, April 2011

NOTE: You can apply Serviceguard patches without doing a rolling upgrade.
Rules and Restrictions for Heterogeneous Clusters
IMPORTANT: Serviceguard A.11.20 is supported only on HP–UX 11i v3, so all cluster nodes
must be running 11i v3 before you can complete a rolling upgrade to A.11.20.
In preparation for an upgrade to Serviceguard A.11.20, you may want to upgrade the nodes from
11i v2 to 11i v3 over time. The rules that follow provide guidance.
A Serviceguard A.11.19 cluster can accommodate a mix of nodes running HP-UX 11i v2 and 11i
v3, with the following restrictions.
• Each node must be running either HP–UX 11i v2 or 11i v3. No other operating system, or
operating-system version (such as 11i v1) is permitted.
• Except during a rolling upgrade of Serviceguard (see “Rules and Restrictions for Clusters in
Transition” (page 37)), all the nodes must be running Serviceguard A.11.19.
IMPORTANT: This means, for example, that before you can add a node running HP-UX 11i
v3 to a cluster in which the existing nodes are running 11i v2, all the 11i v2 nodes, and the
new 11i v3 node, must have Serviceguard A.11.19 installed.
See also “Recommendations” (page 38).
• Some HP–UX 11i v3 features must not be used as long as any nodes are running 11i v2.
These features specifically must not be used:
◦ LVM 2.x volume groups.
◦ Agile addressing (see “About Device Special Files (DSFs)” (page 32) for more information
about agile addressing).
NOTE: Native multipathing, which is enabled by default on HP-UX 11i v3, can be used on
11i v3 nodes in a heterogeneous cluster.
• The cluster must not be using Oracle RAC. (SGeRAC is not supported in a heterogeneous
cluster because Oracle RAC does not support mixing HP-UX versions within a single RAC
cluster.)
• The cluster must not be using Veritas CVM or CFS.
• If you are updating nodes from HP–UX 11i v2 to 11i v3, you must use update-ux; cold
install is not supported in this context.
• If you are updating nodes from HP–UX 11i v2 to 11i v3, and the Serviceguard version bundled
with the HP-UX Operating Environment (OE) is later than the one already installed, rolling
upgrade restrictions apply (see “Rules and Restrictions for Clusters in Transition” (page 37)).
Recommendations
In addition to the above Rules and Restrictions for Heterogeneous Clusters, HP strongly recommends
the following:
• All the nodes on a given HP-UX version should be running the same Fusion release, at the
same patch level; that is, the 11i v2 nodes should all be running the same 11i v2 Fusion
38 Serviceguard Version A.11.20 Release Notes