Scenario 3: Recovering DEDBs without using RECON data sets

The DBRC RECON data set contains log records and database information that is required for database recovery. Database information can be recovered by tracking the latest DBRC LIST.RECON command output list and the console log after executing IMS DEDB Fast Recovery with DBRC=N and re-initializing the RECON data set. Although recovering the log information (such as the start/end time stamps for each OLDS/SLDS) is difficult, log information that was written before IMS failure is no longer required if the user runs the Database Image Copy utility for all databases immediately after the IMS cold start.

The following topics provide the recovery procedure when DBRC=N is specified. These steps are used when the RECON data set cannot be used. The RECON data set needs to be recovered after executing IMS DEDB Fast Recovery. In the data sharing environment, the RECON data set must be recovered after executing IMS DEDB Fast Recovery for all IMS subsystems.

The entire recovery operation is explained in the following three topics: