I am just starting to install 9i for a new project. I have 8.1.5 R3 installed and need to keep this database running at this level. The new project requires 9.1 and I would like to use the same server as it is not being stressed at the moment. Has anyone done this?
Are there any issues / install methods / nightmares I should be aware of before heading in this direction?
you must install the rdbms server software in different homes which will be done with the setup ... and I highly recommend to decide on one oracle Home for the clients funtionality . the 9i listener can address 8i instances and make use of one tnsnames.ora