HALDB change version numbers

IMS assigns a change version number to each partition and to the HALDB master database.

IMS uses the change version number to ensure that internal partition definition control blocks match the HALDB definitions that are stored in the RECON data set.

You do not have control over the change version numbers, although they are displayed in some reports that are generated by the DBRC LIST command. Every time you change the definitions of a HALDB partition, DBRC increments the change version numbers that are stored in the RECON data set for both the partition and the HALDB master database. When IMS detects that DBRC has incremented the number, IMS updates the control blocks of the HALDB database to reflect the new changes.