Planning your database recovery strategy

The simplest, although possibly the most time-consuming, approach is to use an image copy plus all log data sets created since that image copy. You can also:

• Use the database recovery service
• Use the Change Accumulation utility to reduce the amount of log input to the Database Recovery utility
• Create an RLDS with the Log Archive utility and use the RLDS instead of an SLDS

The Database Recovery utility always processes log tapes after it processes the change accumulation data set. If, therefore, you must include log tapes that were created before the change accumulation data set, you must execute DFSURDB0 twice—once with the image copy and log tapes, and again with the change accumulation data set.

If you register your databases with DBRC, DBRC ensures the correct input is provided to the Database Recovery utility, and optionally generates the necessary JCL. For more detailed information on DBRC, see IMS Version 15 System Administration.

Some of the advantages and disadvantages of the different recovery techniques are described in this topic.