The real beauty of having a node manager for every domain on a particular machine are the following two improvements:
– Since the node manager is part of the domain, it will start the servers using the UID of the domain owner. JVM processes on a multi-domain server will be separated and belong to the individual UIDs.
– Node manager configuration and management scripts but even more important node manager logs are within the domain now. So no more logging from node manager into the product installation directory of WebLogic.