HP Serviceguard Version A.11.20 Release Notes, August 2011

This product structure allows Serviceguard customers who subscribe to Update services to download
Serviceguard from the web (along with the sub-products classed as Serviceguard components and
listed above) via Software Update Manager (SUM).
Serviceguard Optional Products Not Bundled
The following optional product is not bundled with Serviceguard, but is delivered free with
Serviceguard on the Serviceguard Distributed Components CD, and can also be downloaded from
http://www.hp.com/go/softwaredepot/ha:
• Quorum Server, and the Quorum Server Version A.04.00 Release Notes.
Serviceguard A.11.19 Is the Required Basis for Rolling Upgrades
A.11.19 is the only version of Serviceguard that will allow both the older version of the cluster
manager and the New Cluster Manager (page 8) to coexist during a rolling upgrade. This means
that though you can perform a rolling upgrade to A.11.19, or from A.11.19 to A.11.20, you
cannot do a rolling upgrade from a pre-A.11.19 release to a post-A.11.19 release.
For example, you can do a rolling upgrade from A.11.18 to A.11.19, but you cannot do a rolling
upgrade from A.11.18 directly to A.11.20; you must upgrade to A.11.19 first. See “Upgrading
from an Earlier Serviceguard Release” (page 41) and “Rolling Upgrade” (page 44).
You can also do a rolling upgrade using a Dynamic Root Disk (DRD). It is recommended to use
this method as it is easier and is less disruptive because each node is down for a shorter time. For
more information, see “Upgrade Using DRD” (page 42).
New Cluster Manager
IMPORTANT: Serviceguard A.11.19 introduced a new cluster manager. Because of this change,
you must upgrade to Serviceguard A.11.19 before you can do a rolling upgrade to any later
release, including Serviceguard A.11.20.
If you are already running A.11.19, you can skip the discussion that follows.
In a running cluster, the new cluster manager affects node timeout and failover and cluster
re-formation, providing significant performance improvements; see the discussion of
MEMBER_TIMEOUT under “Cluster Configuration Parameters” in the latest version of Managing
Serviceguard for more information.
NOTE: Because of these built-in performance improvements, Serviceguard Extension for Faster
Failover is no longer being offered as a separate product (starting with A.11.19).
There is also a one-time effect on upgrade to Serviceguard A.11.19.
8 Serviceguard Version A.11.20 Release Notes