With the exception of UAP environment definitions, normally you must stop HiRDB before you can change any HiRDB system definitions. By using the system reconfiguration command, you can change HiRDB system definitions while HiRDB is running. This allows you to perform the following operations while HiRDB is running:

• Adding, removing, and moving units
• Adding, removing, and moving servers
• Adding system files
• Adding, removing, and modifying system buffers

The system reconfiguration command is extremely useful for systems that are running continuously 24 hours a day. For details about how to use the system reconfiguration command, see the HiRDB Version 8 System Operation Guide.

Note that you must have HiRDB Advanced High Availability to use the system reconfiguration command.