DRA option
By default, Data Optimizer adjusts the region setting for a data set if optimization is performed.
If a data set within a job or step is intercepted and optimization is performed, Data Optimizer adjusts the region to facilitate the additional storage required for the added buffers.
The DRA level setting specifies whether the region size is restored to its original value when the data set is closed. The region adjustment value remains in effect for the duration of the job.
Parameter | Description |
|---|---|
Values | This option has the following possible values: Y - Modify region specifications as needed. N - Do not modify region specifications. |
Default value | Y |
DD overrides | //DAP@DRA DD DUMMY This statement sets the Dynamic region adjustment option to 'Yes' for VSAM and non-VSAM performance processing. //DAP@NDRA DD DUMMY This statement sets the Dynamic region adjustment option to 'No' for VSAM and non-VSAM performance processing. |
Data policy keywords | DRA NODRA |
Set the DRA level by using the DAP DRA command. The following are sample commands:
MBOS DAP DRA STATUS
mbos DAP DRA [0 | 1 |STATUS]
Parameter | Description |
|---|---|
0 | Restore the region size to its original setting. This value is the default. |
1 | Bypass restoring the region size to the original setting. This value overrides the DRA option setting. |
STATUS | Display the current status of this option. |
When the DRA level is set to 1 or the STATUS command is entered, the following message is displayed to indicate that the DRA level setting is in use. mbos is the subsystem name.
BMC101700I DRA,DRA LEVEL IS SET TO 1 mbos
You can add the DAP DRA 1 command to your MainView Batch Optimizer Subsystem (MBOS) BatchPlex commands member (default name is BCSCMD00). This commands member data set is in the MainView Batch Optimizer control data set. The control data set name appears on the BSLPLEX DD statement of the MBOS startup procedure (default name is MBOBCSS).