An Introduction to IMS: Your Complete Guide to IBMs Information Management System

You might need to recreate the RECON data sets, for instance:

• In a disaster recovery site

• After the loss of all the RECON data sets when no current backup is available

Recreating the RECON data sets can be a long and slow process. When designing procedures to handle this process, there are two basic alternatives:

• Restore the RECON data sets from the last backup (if available) and update it to the current status required

• Recreate and reinitialize the RECON data sets

Both of these procedures have advantages and disadvantages. The best alternative for an installation depends on:

• The timeframe in which the system must be recovered and available

• The point in time to which it is acceptable to recover

• The type of processing environment (24-hour online availability or batch)