Difficulties on Upgrading PowerHA from 7.1.0 to 7.1.3

[amritjsr]

Hi All,

As per the IBM upgrade/support matrix

http://www-03.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/TD101347

we can't do online upgrade or rolling migration from powerha v7.1.0 to v7.1.3. on AIX61_TL9_SP4, So we are following the steps as below ...

1 ) Bring down the cluster
2 ) CAA_FORCE_ENABLED=1
3 ) /usr/sbin/rmcluster -n cluster_name
4 ) upgrade PowerHA using smitty update_all ( updating PowerHA software from 7.1.0 to 7.1.3 ) to all the nodes.
5 ) after upgrade restart all the nodes .. shutdown -Fr
6 ) Create the CAA cluster by running the /usr/es/sbin/cluster/utilities/clmkcaa command
7 ) Verify that the CAA services are active by running the /usr/sbin/lscluster -m
8 ) If step 6 failed then .. and cluster don't form properly then follow the below steps ..
/usr/es/sbin/cluster/conversion/clconvert_snapshot -v version -s snapshotname ( version is the previous version before upgrade can be taken using halevel command )
E.g. /usr/es/sbin/cluster/conversion/clconvert_snapshot -v 7.1.0 -s snapshotname
From the command line, enter smit hacmp.
In SMIT, select Cluster Nodes and Networks > Manage the cluster > Snapshot Configuration > Restore the Cluster Configuration from a Snapshot, and press Enter.
Select the snapshot that you want to restore, complete the required fields, and press Enter.
9 ) Run the /usr/sbin/lscluster -m command to verify that the Cluster Aware AIX (CAA) services are active on each node in the cluster.

So far this worked well, but few servers we aren't getting downtime for powerha upgrade, is there any one done online or rolling migration ? Any one found any clever way to over this downtime difficulty ?

Thanks In Advance,
Amrit