Before you decide which architecture to use for the Oracle UDLM and the Oracle relational database management system (RDBMS), note the following points.
The architecture of both Oracle components must match. For example, if you have 64-bit architecture for your Oracle UDLM, you must have 64-bit architecture for your RDBMS.
If you have 32-bit architecture for your Oracle components, you can boot the node on which the components reside in either 32-bit mode or 64-bit mode. However, if you have 64-bit architecture for your Oracle components, you must boot the node on which the components reside in 64-bit mode.
You must use the same architecture when you boot all the nodes. For example, if you boot one node to use 32-bit architecture, you must boot all the nodes to use 32-bit architecture.