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Operating Systems AIX [Howto] Update AIX in HACMP cluster-nodes Post 302779465 by MichaelFelt on Tuesday 12th of March 2013 05:04:36 PM
Old 03-12-2013
Quote:
Originally Posted by bakunin
The following procedure is proven to work with AIX 5.3, 6.x and 7.x and associated HACMP/PowerHA versions. It needs only one takeover, so the downtime is from somewhere from under a minute to some minutes, depending on the nature of your resource group(s).

Communications in HACMP happens via RSCT and for a cluster to work the version of the RSCT-packages have to be in sync. Fortunately it is easy to update the RSCT independent of the rest of the OS.
... snip ...
I hope this helps.

bakunin
Looks good - however, have you also verified this with an update to SystemMirror (aka PowerHA v7?). As I understand it, SystemMirror is not using (only?) RSCT - but is using CAA (Cluster Aware AIX) for communication, topology and heartbeats. -- I do not do much with SystemMirror so I am asking - anyone - just to be sure someone does not get surprised when working with/updating to SystemMirror.
 

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scversions(1M)						  System Administration Commands					    scversions(1M)

NAME
scversions - Sun Cluster version management SYNOPSIS
scversions [-c] DESCRIPTION
Note - Beginning with the Sun Cluster 3.2 release, Sun Cluster software includes an object-oriented command set. Although Sun Cluster software still supports the original command set, Sun Cluster procedural documentation uses only the object-oriented command set. For more infor- mation about the object-oriented command set, see the Intro(1CL) man page. The scversions command commits the cluster to a new level of functionality after a rolling-upgrade to new Sun Cluster software. With no arguments, the scversions command prints a message indicating whether a commitment is needed. OPERANDS
The following operands are supported: -c Commit the set of nodes that are currently active members of the cluster to the highest possible level of functionality. When you upgrade a node (either through upgrade to a new release of the product or by application of a patch) and boot it back into the cluster, some of the internal protocols on that node might have to run at lower versions in order to cooperate cor- rectly with other nodes in the cluster. When the cluster is in this state, some administrative actions might be disabled and some new functionality introduced in the upgrade might be unavailable. When you run this command once from any node after all nodes are upgraded, the cluster switches to the highest versions of internal protocols possible. Assuming that all nodes have the same Sun Cluster software installed at that time, all new func- tionality becomes available and any administrative restrictions are removed. If a node that has not been upgraded is an active member of the cluster at the time you run the -c option to scversions, the command has no effect because the cluster is already running at the highest possible level of functionality. If a node has not been upgraded and is not an active member of the cluster when you run the -c option to scversions (for exam- ple, if that node is down for maintenance), the internal protocols of the cluster are upgraded to the highest possible ver- sions. You might have to upgrade the node that was not an active member of the cluster to enable it to rejoin the cluster. EXIT STATUS
0 Success non-zero Failure ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWsczu | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ SEE ALSO
scinstall(1M) Sun Cluster 3.2 17 Aug 2007 scversions(1M)
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