Copy Services Manager Modernization Guide

Copy Services Manager (CSM) is a z/OS-based tool for managing replication and copy services functions on DASD storage. It automates tasks such as creating snapshots, managing replication sessions, and performing disaster recovery operations.

CSM supports various replication technologies, including IBM Metro Mirror, Global Mirror, and z/OS Global Mirror. It provides a centralized interface for managing these different replication types.

CSM uses policies to automate replication tasks. These policies define the steps to be performed, the order in which they are performed, and the conditions under which they are performed. Policies can be customized to meet specific requirements.

CSM can be integrated with other z/OS management tools, such as IBM System Automation for z/OS, to provide a comprehensive solution for managing the z/OS environment.

Common commands include defining a new Copy Services Manager server instance, defining storage subsystems, creating and managing copy sessions, and executing predefined policies. Examples include defining a new session using the GUI or CLI commands to start and stop replication.

CSM exposes a REST API for programmatic interaction. Specific endpoints allow for querying session status, initiating failover operations, and modifying configuration parameters. The API uses standard HTTP methods (GET, POST, PUT, DELETE).

The main components are the CSM server, the database (typically DB2), and the z/OS host where CSM runs. Communication occurs via TCP/IP. Ports used include the port for the CSM web interface and ports for communication with storage subsystems.

CSM uses a DB2 database to store configuration data, session information, and historical data. This database is critical for the operation of CSM and must be properly maintained.

CSM helps improve business continuity by automating disaster recovery processes. It reduces the time and effort required to recover from an outage, minimizing downtime and data loss.

By automating replication tasks, CSM reduces the risk of human error and ensures that replication is performed consistently and reliably. This improves data protection and reduces the likelihood of data corruption.

CSM provides a centralized interface for managing replication across multiple storage subsystems. This simplifies management and reduces the administrative overhead associated with replication.

CSM can help reduce costs by optimizing storage utilization and reducing the need for manual intervention. It also helps to avoid costly outages by improving business continuity.

CSM supports authentication via RACF, ACF2, and Top Secret. These are z/OS security managers that control access to resources. CSM integrates with these security managers to authenticate users.

CSM uses Role-Based Access Control (RBAC) to control access to its functions. Users are assigned roles, and each role has specific permissions. This allows administrators to control who can perform which tasks.

CSM encrypts sensitive data, such as passwords and cryptographic keys, both in transit and at rest. It uses industry-standard encryption algorithms to protect this data.

CSM logs all security-related events, such as login attempts, access control changes, and policy executions. These logs can be used to audit security and identify potential security breaches.

CSM provides a web-based GUI and a command-line interface (CLI) for administration. The GUI is used for most administrative tasks, while the CLI is used for scripting and automation.

User management is handled through the z/OS security managers (RACF, ACF2, Top Secret). CSM uses these security managers to authenticate users and control access to its functions.

Key configuration parameters include the database connection parameters, the storage subsystem definitions, and the policy definitions. These parameters are configured through the GUI or the CLI.

CSM provides extensive monitoring and logging capabilities. It monitors the status of replication sessions, the performance of storage subsystems, and the health of the CSM server. It logs all events to a log file, which can be used for troubleshooting and auditing.