Managing Serviceguard Sixteenth Edition, March 2009

D Software Upgrades
There are three types of upgrade you can do:
• rolling upgrade
• non-rolling upgrade
• migration with cold install
Each of these is discussed below.
Special Considerations for Upgrade to Serviceguard A.11.19
Serviceguard A.11.19 introduces a new cluster manager. In a running cluster, this affects
node timeout and failover and cluster re-formation; see the discussion of
MEMBER_TIMEOUT under “Cluster Configuration Parameters ” (page 138) for more
information. There is also a one-time effect on upgrade to Serviceguard A.11.19.
Upgrade will trigger a cluster membership transition from the old to the new cluster
manager when the last node in the cluster has been upgraded to A.11.19. This transition
can take up to one second, during which time the old cluster manager will shut down
and the new cluster manager will start.
CAUTION: From the time when the old cluster manager is shut down until the new
cluster manager forms its first cluster, a node failure will cause the entire cluster to fail.
HP strongly recommends that you use no Serviceguard commands other than
cmviewcl (1m) until the new cluster manager successfully completes its first cluster
re-formation. In the case of a Rolling Upgrade (page 408), this happens when the
cmrunnode for the last node executes; in a Non-Rolling Upgrade (page 408), it happens
during the initial cmruncl. See “How To Tell when the Cluster Re-formation Is
Complete” for more information. For an upgrade to Serviceguard A.11.19, this
recommendation is additional to the Limitations of Rolling Upgrades (page 409) and
Limitations of Non-Rolling Upgrades (page 416), and supersedes any “Limitation” that
is more lenient.
There may be further caveats that apply to specific upgrade paths; before you proceed,
make sure you read the “Announcements”, “Compatibility”, and “Installing
Serviceguard” sections of the latest version of the HP Serviceguard Version A.11.19 Release
Notes posted on docs.hp.com under High Availability —> Serviceguard
—> Release Notes.
If you are using a Quorum Server, make sure you also read the latest version of the HP
Serviceguard Quorum Server A.04.00 Release Notes before you proceed. These are also
posted on posted on docs.hp.com, under High Availability —> Quorum
Server —> Release Notes
How To Tell when the Cluster Re-formation Is Complete
You can tell when the cluster has re-formed under the new cluster manager by
monitoring syslog on any node. syslog will record that Serviceguard has started
Special Considerations for Upgrade to Serviceguard A.11.19 407