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.

Random distribution of database records across all DEDB areas

Changes to the DEDB unit of work (UOW) structure that affect the number of DEDB Control Intervals defined to the Root Addressable portion impact the number of root anchor points within the entire DEDB. This type of change potentially affects the location of every database record within the DEDB.

Standard DEDB randomizing routines

Standard DEDB randomizing routines attempt to evenly distribute database records across all areas and within the selected AREA. Such randomizing routines determine the record location based on the total number of root anchor points in the entire DEDB.

A change to the UOW structure that changes the number of CIs defined to the root addressable area constitutes Database Level change when a standard DEDB randomizing routine is used. This type of change should be treated the same as a DEDB structural change in terms of online change procedures.