Adding or deleting DEDB areas using online change

Adding or deleting an area can affect the location of every database record throughout the DEDB. Changing the number of areas will alter the number of root anchor points (RAPs) within the DEDB.

DEDB randomizing routines attempt to randomly distribute database records throughout the entire DEDB based first on the area and then on the root anchor point (RAP) within the area.

Adding or deleting one or more areas to a DEDB constitutes a structural change such as adding a segment type. The steps described in Adding or deleting DEDB segments using online change should be followed to change the number of areas defined in the DEDB. If areas are newly added, the required DBRC definitions for areas and area data sets must be processed and dynamic allocation blocks must be prepared before the new areas can be accessed by the active IMS system.