Chapter 23. Database Recovery Control (DBRC) Facility

The Database Recovery Control (DBRC) facility includes the IMS functions that:

• Ensure IMS system and database integrity.

• Control log and database recovery.

• Control access to databases by various IMS subsystems sharing those databases.

Related Reading: This chapter contains an overview of DBRC and briefly describes how to use it. For the details about DBRC, see IMS Version 9: Database Recovery Control (DBRC) Guide and Reference.

In This Chapter:

• "Overview of DBRC" on page 376

• "DBRC Tasks" on page 376

• "DBRC Components" on page 377

• "When Should You Use DBRC?" on page 378

• "Communicating with DBRC" on page 379

• "DBRC Functions" on page 381

• "Overview of the RECON Data Sets" on page 395

• "Defining and Creating the RECON Data Sets" on page 398

• "Initializing the RECON Data Sets" on page 399

• "Allocating the RECON Data Sets to an IMS System" on page 400

• "Maintaining the RECON Data Sets" on page 401

• "Reorganizing RECON Data Sets" on page 403

• "Recreating the RECON Data Sets" on page 404

• "Summary of Recommendations for RECON Data Sets" on page 404