upgrading hp-ux in a cluster using update-ux?

[dc-solutions]

we have a cluster with 11.23 and SG 11.18.00
The cluster serves several oracle instances (not RAC, just active/passive oracle)

we need to upgrade hp-ux version to 11v3, is it possible to upgrade the O.S with update-ux or is it necessary to cold install everything and rebuild the cluster?

we're thinking about this plan:

moving all the packages from node a to node b
update node a to 11v3 using update-ux
reboot the node
move the packages back to node a
update node b
reboot
move some packages to node b

is it posible?

any help would be greatly appreciated

[Rita C Workman]

In brief (very brief) should work...but...

If your cluster is small it is possible while your running your update-ux that the cluster could have some event and then what happens? Answer - that depends...

But you might want to:

Create recover tapes
Run your backups.
Schedule downtime if at all possible to ensure your data is secure..
Then halt the cluster and do the update-ux.

Or if you can't get a big downtime, then you could do it with just stop/starts of packages downtime.
You might try:

Create your recover tapes.
Run my backups.
Move packages around to free up one node.
Take that one node out of the existing cluster and update-ux and get it up and running at new version.
Take that one node and create a single node cluster.
Than remove a couple packages from the old cluster and move to the new node's cluster.

Update that second node since it doesn't have anything running on it, remove it from old cluster (if there are multiple nodes still in the old cluster) and then add to new cluster.
Continue moving packages out of old and into new cluster until you have everything done.

Create new recover tapes.
Backup everything.

Just a thought,
Rita