Controlling the number of image copies managed

Use the INIT.DBDS and the CHANGE.DBDS commands to specify how many image copies of the DBDS or area that DBRC is to maintain records of.

The GENMAX parameter specifies the maximum number of recovery generations (images) that DBRC maintains for the identified DBDS or DEDB area. Duplicate image copy data sets are not included in this number.

Use the RECOVPD parameter to maintain data for a certain period.

Related reading:

See Recovery period of image copy data sets and GENMAX for more information about the RECOVPD parameter.
See INIT.DBDS command in IMS Version 15.2 Commands, Volume 3: IMS Component and z/OS® Commands for more information on the REUSE, NOREUSE, GENMAX, and RECOVPD.