Reusing change accumulation data sets

To allow DBRC to reuse old change accumulation data sets, define a change accumulation group with the REUSE keyword and use the DBRC GENJCL.CA command to generate the JCL for the Database Change Accumulation utility job.

The Database Change Accumulation utility reuses the oldest change accumulation data set when all available change accumulation data sets for a particular change accumulation group have been used and the maximum number of change accumulation data sets has been reached. Reusing a change accumulation data set means that DBRC uses its data set name, volumes, physical space, and record in the RECON data set as if they were for an empty change accumulation data set.

If you define a group with the NOREUSE keyword, rather than reuse the data set, DBRC deletes the RECON record for the oldest change accumulation data set. In this case, DBRC does not scratch the data set. You must scratch the data set or keep track of it, because DBRC is no longer aware of it.