We have Oracle 10G installed since last year. So far so good. But since Oracle had release latest one R2, can anyone tell me how to upgrade the existing 10G R1 ? There are a lot of data inside the server and many system had been deployed. So how can I ensure the upgrade will work 100% or another word, I am afraid if the upgrade failed, the system also failed. If the upgrade is straight foward without reconfigure or minimum changes, then I will try if the procedure is simple and easy.
Another thing is, we also have 2nd 10G installed to another machine. We plan to use this as a backup, just incase 1st server down, 2nd one will take over. But I believe it is not as siimple as it is. How can I do that ?