Recovery control (RECON) data sets

DBRC automatically records information in dual recovery control (RECON) data sets. Both data sets contain identical information, and so are usually referred to as one: the RECON. The information from the RECON is needed during warm and emergency restarts. DBRC selects the correct data sets to be used by a recovery utility when you enter a GENJCL command. For a restart, the RECON shows which data set, the OLDS or the SLDS, contains the most recent log data for each database data set (DBDS) you have registered with DBRC. For the OLDS, the RECON shows whether the OLDS has been closed and whether it has been archived. The RECON contains timestamp information for each log data set and volume. IMS uses this information to determine which data set and volume contain the checkpoint information needed to restart DBCTL.