It is usually necessary to terminate HiRDB in order to modify a HiRDB system definition (other than a UAP environment definition). However, by using the system reconfiguration command, you can modify HiRDB system definitions while HiRDB is still active. The actions listed below can be executed while HiRDB is active:

• Adding, removing, or moving units
• Adding, removing, or moving servers
• Adding system files
• Adding, removing, or modifying global buffers

The system reconfiguration command is very convenient in the case of a system that runs around the clock without interruption. For details about using this command, see the following references:

• For details about using the system reconfiguration command about modifying HiRDB system definitions, see 9.2 Modifying HiRDB system definitions while HiRDB is running (system reconfiguration command).
• For details about adding, removing, or moving units or servers, see 11. Modifying the System Configuration.
• For details about adding system files, see 3.5.8 Adding a new system log file, 4.3.5 Adding a new synchronization point dump file, or 5.2.6 Adding a new status file.
• For details about adding, removing, or modifying a global buffer, see 15.2 Creating an RDAREA (RDAREA addition).

Note that HiRDB Advanced High Availability must be installed in order to use the system reconfiguration command.

Note

Depending on the operating status of HiRDB, it might not be possible to execute the pdchgconf command. For details, see the description of the pdchgconf command in the manual HiRDB Version 9 Command Reference.