Extending a DEDB online with FPO

You can extend the size of an online DEDB area by using the Online Area Extender utility (also referred to as OAE) of FPO.

Functions of OAE
Occasionally, it becomes necessary to increase the size of a DEDB area. In the past, the DEDB area had to be taken offline in order to change the DBD/ACB and to resize the area. This was potentially disruptive in environments where database availability was crucial.
Restrictions of OAE
Certain restrictions apply to using OAE.
Input and output for OAE
OAE has two types, the original expansion and the shadow expansion.
Considerations for running OAE
The following topics describe what you need to consider before running OAE.
Running OAE
OAE operates on an area level. Each invocation of OAE specifies the area name as a parameter, and OAE will access only this area. However, multiple areas can be processed sequentially in a single run, similar to the DBFUMRI0 utility.
Region size requirements for OAE
The region size for OAE depends on the size of a UOW.
DD statements for OAE
DD statements for OAE determine the input and output data sets and specify how to run OAE.
Option control statement for OAE
The option control statement defines the user description of the OVERRIDE control statement, which specifies information for setting temporary override values of product message defaults.
Utility control statements for OAE
The utility control statements for OAE define the user description of the control statement specified in SYSIN DD and the EXTEND control statement specified in FPXIN DD, both of which control the OAE process.
Output for OAE
The following topics describe the outputs that are generated by OAE.
OAE Rename program
To complete the OAE process for the original expansion with EXTEND_TYPE=RENAME, rename will be done by the OAE Rename program, which should be the step that immediately succeeds the OAE program.
Examples for OAE
There are many ways to run the OAE utility. The examples provided in the following topics show some of the typical ways to run the OAE utility.

Parent topic: IMS Fast Path Online Tools