HP Serviceguard Version A.11.20 Release Notes, February 2014

It is also possible to upgrade the HP-UX version without upgrading Serviceguard, and so avoid
the rolling upgrade restrictions. In this case you must make sure that:
• The Serviceguard version bundled with the HP-UX Operating Environment (OE) matches the
version already installed.
CAUTION: You need to pay careful attention to the Serviceguard patch level as well as the
Serviceguard version. If you install Serviceguard at a patch level lower than the one the cluster
was running, any new features introduced in the higher-level patch will cease to be available;
you will need to re-install the higher-level patch on all nodes before you can use its features
again.
• The Serviceguard product bundled with the HP-UX OE is installed along with the HP-UX filesets.
(The Serviceguard binary files differ between HP-UX 11i v2 and 11i v3, even though the
Serviceguard version is the same.)
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 39).
• 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.
38 Serviceguard Version A.11.20 Release Notes