Making online changes at the DEDB and area level
You can make online changes to DEDB databases at either the database level or the area level.
Adding or deleting DEDB databases using online change
You can add or delete a DEDB database by using the online change function.
Adding or deleting DEDB segments using online change
You can add or delete a DEDB segment by using the online change function.
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.
Changing DEDB root addressable space allocation using online change
There are different implications depending on whether you randomly distribute DEDB records or use a standard randomizing routine to evenly distribute DEDB records. In either case, you can distribute DEDB records across an entire DEDB or just a single DEDB area.
Online change and DEDB dependent and independent overflow space allocation
Fast Path has provides limited support for extending DEDB AREA Independent Overflow space allocation. Additionally, DEDB online change will allow changes to the overflow space allocation both within each UOW (Dependent Overflow) and outside the root addressable portion (Independent Overflow) of the AREA.
Changing DEDB CI size using online change
DEDB online change can be used to change DEDB AREA control interval size. However, CI size changes must not alter the number of CIs allocated to the root addressable portion of an AREA because this could affect the DEDB randomizing routine in locating database records across the DEDB.
Parent topic:
Activating database changes by using the online change function