Serviceguard Extension for RAC Version A.11.19 Release Notes (May 2010)

12. Verify that the applications are functioning properly.
• If the applications do not function properly and this is not the last node to be upgraded, you
can revert to the previous release on this node. This is called hot recovery, and it will allow
you to keep the node up and running in the cluster while you upgrade the other nodes, though.
You will still need to investigate and solve the problems on this node before the cluster upgrade
can complete. If you decide to perform a hot recovery, proceed as follows:
1. Halt the packages and restart them on another node.
2. Halt the node.
3. Reboot the node from the original root disk (which still contains the pre-upgrade versions
of HP-UX and Serviceguard).
4. Restart the cluster on the node, using Serviceguard Manager or cmrunnode (1m).
• If the applications do not function properly and this is the last node to be upgraded, you
cannot revert to the previous release on just this node. You must either solve the problems
with this release on this node, or revert the entire cluster to the previous release by halting
the cluster (cmhaltcl), rebooting each node from its original (pre-upgrade) root disk, and
restarting the cluster (cmruncl).
• If the applications are functioning properly, continue with the next step.
13. Repeat the above steps for each node in the cluster.
If the cluster fails before the rolling upgrade is complete (because of a catastrophic power failure, for
example), you can restart the cluster by running cmruncl (1m) on a node which has been upgraded
to the latest version of the software.
Performing a Non-Rolling Upgrade Using DRD
Limitations of Non-Rolling Upgrades using DRD
CAUTION:
Stricter limitations apply to an upgrade to A.11.19. Do not proceed with an upgrade to A.11.19
until you have read and understood the “Special Considerations for Upgrade to Serviceguard A.11.19”
in Appendix D of the latest version of Managing Serviceguard .
IMPORTANT:
Not all paths that are supported for upgrade are supported for an upgrade using DRD, and there
are additional requirements and restrictions for paths that are supported.
Do not proceed until you have read the “Announcements”, “Compatibility”, and “Installing
Serviceguard” sections of the latest version of the Serviceguard release notes and the corresponding
sections of these SGeRAC release notes, made sure your cluster meets the current requirements, and
taken any necessary preparation steps as instructed in the release notes.
You must also make sure you have read and understood the “Restrictions for DRD
Upgrades” on page 12.
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