Oh hey, thanks!
I paste the procedures here in case someone else also needs it. So in the cookbook chapter 2.4.3 , it mentions
1. Shared volume groups that contain file systems that will be exported by NFS must have the same major number on all nodes, or the client applications will not recover on a fallover.
2. If NFS exports are defined on the node through PowerHA, all NFS exports must be controlled by PowerHA.
AIX and PowerHA NFS exports cannot be mixed.
3. If a resource group has NFS exports defined, the field “file systems mounted before IP configured” must be set to true.
4. By default, a resource group that contains NFS exported file systems, will automatically be cross-mounted. This also implies that each node in the resource group will act as an NFS client, so must have a IP label on the same subnet as the service IP label for the NFS server.
BTW, the reason I still a newbie
is that this is NOT my job responsibility at all. We have some specific group people who are supposed to do this for us, but they are doing a lousy job.