Db2 Recovery Expert

The architecture of Db2 Recovery Expert is designed for high availability and efficient recovery of Db2 databases on z/OS. The core components include the Recovery Expert Server, the Db2 Data Collector, the Recovery Expert Client, and the Recovery Engine. The Recovery Expert Server acts as the central management component, coordinating backup and recovery operations.

It communicates with the Db2 Data Collector, which gathers metadata and log information from the Db2 databases. The Recovery Expert Client provides the user interface for managing recovery tasks. The Recovery Engine is responsible for executing the recovery operations, using the data collected by the Db2 Data Collector.

Communication between these components is primarily over TCP/IP, with secure communication using HTTPS. The Recovery Expert Server stores configuration data and metadata in a Db2 database. The backup data can be stored on various storage mechanisms accessible from z/OS, such as DASD or tape.

The CLI and GUI provide interfaces for administrators to manage the system. The CLI allows for scripting and automation of recovery tasks. The GUI provides a user-friendly interface for monitoring and managing recovery operations.

The system supports integration with existing monitoring tools through APIs, allowing for real-time monitoring of backup and restore processes. The security model relies on the z/OS security infrastructure, including RACF, for authentication and access control. This architecture ensures that the recovery process is reliable, secure, and efficient, minimizing downtime and data loss.