MasterCopySet for DB2 on z/OS Modernization Guide

MasterCopySet creates full image copies independently of DB2, allowing DB2 processing to continue uninterrupted. It leverages existing DB2 full image copies, incremental image copies, and DB2 logs to create a consistent full image copy.

MasterCopySet uses a combination of the last DB2 full image copy, incremental image copies, and DB2 logs to create a full image copy. This approach minimizes the impact on DB2 performance during the image copy process.

MasterCopySet integrates with the broader MASTER-UTIL suite, providing a comprehensive set of utilities for DB2 management and optimization.

While specific command syntax is dependent on the MASTER-UTIL suite version, common operations involve specifying the DB2 objects (tablespaces, partitions) to be copied, defining the output dataset names, and setting options for incremental copy and log application.

MasterCopySet likely uses configuration files to define parameters such as dataset naming conventions, storage locations, and performance tuning options. These files are typically customized to match the specific DB2 environment.

The architecture likely involves a main control component that orchestrates the image copy process, data mover components that read and write data, and log processing components that apply changes from the DB2 logs.

By creating image copies independently of DB2, MasterCopySet minimizes the impact on DB2 transaction processing and overall system performance. This allows for more frequent backups without disrupting critical business applications.

Faster backup times translate to reduced downtime during recovery scenarios. The ability to quickly restore DB2 objects from image copies minimizes the impact of data loss events.

MasterCopySet likely leverages the security features of the z/OS operating system, including RACF or ACF2, for authentication and authorization. Access to the utility and its functions is controlled through these security systems.

The access control model is likely based on role-based access control (RBAC), where users are assigned roles with specific permissions to perform certain tasks within MasterCopySet.

Audit logging is a standard feature, recording all actions performed within MasterCopySet, including user logins, command executions, and data access events. These logs are essential for security monitoring and compliance.

Administrative interfaces likely include a command-line interface (CLI) for batch processing and automation, and potentially a GUI or web console for interactive management. The CLI is commonly used for scheduling backups and restores.

User management is typically handled through the z/OS security system (RACF or ACF2), where user accounts and permissions are defined. MasterCopySet integrates with these systems to enforce access control policies.

Monitoring and logging capabilities include real-time status displays, historical performance data, and detailed error messages. These features help administrators identify and resolve issues quickly.