IMS database utilities

DBCTL enables you to use utilities that IMS™ provides to help with the backup and recovery of your databases. These utilities are listed below.

Note:
Because database change records are written to the IMS log, you do not need to retain the CICS® system log for use by IMS database recovery utilities in a DBCTL-exclusive environment.

You can use these utilities together to perform recovery by updating a copy of the database with the changes logged since the copy was made, as shown in Figure 29. See the IMS Utilities Reference: Database manual manual and the IMS Operations Guide for further guidance on using the utilities, including any restrictions that may apply.

Figure 29. Database recovery utility, DFSURDB0, showing inputs and outputs
 This figure summarizes the input needed by the DFSURDB0 utility, from which it outputs a recovered data set and SYSPRINT messages. The input is from: image copy (DFSUDMP0 or DFSUICP0), change accumulation (DFSUCUM0), log(s), the RECON, the DBD library, the data set to be recovered, and input control statements.

Note:
Input from the image copy and change accumulation utilities is optional.

Related concepts
Recovery and restart operations for DBCTL
Overview of CICS and IMS recovery and restart
Commit protocols and units of recovery for DBCTL
IMS log utilities
Component failures in the CICS DBCTL environment
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