Modify the value specified for the pd_rdarea_extension_timing operand. In this example, use is specified as the automatic extension trigger. Furthermore, to initialize the area to be expanded during automatic extension, the pd_rdarea_expand_format operand is specified.

                         :
set pd_rdarea_extension_timing=use
set pd_rdarea_expand_format=Y
                         :

For details about how to modify the HiRDB system definition, see 9.1 Modifying HiRDB system definitions or 9.2 Modifying HiRDB system definitions while HiRDB is running (system reconfiguration command).

 
 pdfmkfs -n 100 -k DB -a -i /rdarea/area01
 

Explanation

Specifies the -a option to create a 100 MB HiRDB file system area (/rdarea/area01) for RDAREAs. Specifies the -i option to initialize the HiRDB file system area.

A control statements file (/pdmod/create01) is created for the create rdarea statement of the pdmod command. The following are the contents of the control statements file:

 
create rdarea RDAREA1
   for user used by PUBLIC
   server name bes1
   page 4096 characters
   storage control segment 10 pages
   extension use 500 segments
   file name "/rdarea/area01/file01"
      initial 1000 segments;
 

Explanation

Specifies an extended segment count in the extension operand in order to apply RDAREA automatic extension.

In this example, the last HiRDB file (/rdarea/area01/file01) to be allocated to the RDAREA (RDAREA1) is automatically expanded by 500 segments each time the automatic extension trigger occurs.

 
pdmod -a /pdmod/create01
 

Explanation

Specifies the name of the control statements file for the pdmod command created in step (3).

 
pdcopy -m /rdarea/mast/mast01 -M r -a -b /pdcopy/backup01 -p /pdcopy/list01
 

Explanation

Because the pdmod command invalidates logs, you must acquire a backup after execution. If a backup is not acquired here, the RDAREA can be restored only to the state it was in before execution of the pdmod command. For details about how to back up data, see 6. Backup Procedures.

 
pdbufmod -k add -a gbuf01 -r RDAREA1 -n 1000
 

Explanation

This step adds a new global buffer (gbuf01) and allocates it for RDAREA1. In this example, the pdbufmod command is used to add a global buffer and allocate it.

Note, however, that both the following conditions must be satisfied in order to use the pdbufmod command:

• HiRDB Advanced High Availability is installed.
• The value Y is specified in the pd_dbbuff_modify operand.

The global buffer allocated in this procedure becomes invalid if HiRDB is terminated normally or through a planned termination. Therefore, change the pdbuffer operand specification while HiRDB is stopped. An example of the pdbuffer operand specification follows:

                         :
pdbuffer -a gbuf01 -r RDAREA1,RDAREA2,RDAREA3 -n 1000
                         :

Explanation

The added RDAREA (RDAREA1) is assigned to a global buffer (gbuf01).

You can use the system reconfiguration command (pdchgconf command) to change the pdbuffer operand specification while HiRDB is running. Note that HiRDB Advanced High Availability must be installed in order to use the system reconfiguration command. For details about changing HiRDB system definitions using the system reconfiguration command, see 9.2 Modifying HiRDB system definitions while HiRDB is running (system reconfiguration command).

We recommend that after the command has executed you check whether the execution results are correct. For details on how to check command execution results, see the manual HiRDB Version 9 Command Reference.