Hi friend,

Thanks...maybe is it a failsafe. I dont really understand much the difference about cluster, failsafe, and RAC. I just know they
are synonymous dierivatives of each other. All i know is RAC shared
one database and have more that one instance on separate nodes.

If I have a cluster database with 2 nodes PROD AND DEV,
is there an order to which node is to be patch first? Is there a term
"primary node" and "secondary node"? How can I tell which one
is primary and which one is secondary?

The RAC Patch install procedure says...

1. If u are installing the patch set in a cluster invironment, The
cluster node selection screen will appear.Click each participating
node and install. then run root.sh to all the participating nodes.

Please tell me if my understanding in cluster patch install is right.

1. I can choose 1 and only 1 node to where i can install the patch.
From this node, i will install the patch to all the participating
nodes in a cluster. Once I have chosen that node, I can not go
to other nodes to resume installing the same patch.

It does not tell me which node to install first. So i can assume any
node will do.

...So in may case, since i have patch the DEV node first, then I
will run the patch from DEV node again and click the PROD node
from there? and install the patch? then it will generate a root.sh
on the PROD sever home? even though im installing from another
server (DEV). Will this solve my problem "Theres no patches that
need to be applied"?

How can i detach the a node from the cluster and make it
stand alone?

How can i re-attach it?


Thanks a lot