The table below lists the HiRDB system definition files. The figure following that shows a configuration example of HiRDB system definition files.

Table 6-6 HiRDB system definitions (HiRDB parallel server configuration)

HiRDB system definition type	Storage file name	Description
System common definition	%PDDIR%\conf\pdsys	Defines the configuration of HiRDB and common information. This file is required for each unit. All units must have the same system common definition.
Unit control information definition	%PDDIR%\conf\pdutsys	Defines unit control information. This file is required for each unit.
Server common definition	%PDDIR%\conf\pdsvrc	Defines default values for individual server definition operands. This file is optional.
Front-end server definition	%PDDIR%\conf\server-name	Defines the execution environment for a front-end server. This file is required for each front-end server.
Dictionary server definition	%PDDIR%\conf\server-name	Defines the execution environment for a dictionary server. This file is required for each dictionary server.
Back-end server definition	%PDDIR%\conf\server-name	Defines the execution environment for a back-end server. This file is required for each backend server.
UAP environment definition	%PDDIR%\conf\pduapenv\any-name	Defines the execution environment for UAPs. This file is optional. You must create UAP environment definitions in a unit that contains a front-end server. If you have multiple front-end servers, define these definitions on the front-end server to which you wish to apply the UAP environment definitions. You can create a maximum of 4,096 UAP environment definitions.
SQL reserved word definition	%PDDIR%\conf\pdrsvwd\any-name	Defines SQL reserved words. This file is required to use the SQL reserved word deletion facility. For details about the SQL reserved word deletion facility, see the HiRDB Version 9 UAP Development Guide.

Figure 6-8 Example configuration of HiRDB system definition files (HiRDB parallel server configuration)