Hi,
I have 2 node SQLServer 2008R2 cluster where two separate instances ERP & APPS is running on each node separately. Every other node is passive to the node having the active instance. like:
ERP running on Node1. where Node2 is passive node for ERP instance.
APPS running on Node2, where Node1 is passive node for APPS instance.
I need to upgrade from SP1 to SP3 for SQLServer2008R2. Following is what my Action Plan is:
1- Fail-over ERP to Node2 (having APPS instance already running)
2- Install/patch SP3 on Node1 (which is now passive for all isntances)
3- After SP3 upgrade on Node1, Fail-back ERP to Node1 and monitor any issues to mend.
4- After 1-2 days observation, if no issue found, Fail-over APPS instance from Node2 to Node1 (where ERP is running) and make Node2 complete passive.
5- After SP3 install on node2, fail-back APPS instance to Node1 and monitor.
****My, question is, would this approach work? without any issue? OR would there be any issue as Both nodes are at same time ACTIVE but meanwhile PASSIVE for other instance.
****I dont want to do full fail-over of all instances at same time for patching.
Please confirm or suggest the way forward.
Hoping early response from experts.
BR//
Nadeem