Rapid Reorg for Db2 Modernization Guide

Rapid Reorg for Db2 is a high-speed utility designed to reorganize tablespaces and indexes within Db2 environments. It streamlines the reorganization process, often reducing the time required compared to standard Db2 utilities.

Yes, Rapid Reorg can collect statistics during the reorganization process. This helps ensure that Db2's query optimizer has access to accurate information for efficient query execution.

Rapid Reorg can create image copies during the reorganization process. This provides a backup of the data in case of any issues during or after the reorganization.

Rapid Reorg includes CA OnlineReorg functionality (from version 7.1 onwards), allowing tables to be reorganized while maintaining read and update access to the data.

The core function is invoked via JCL. Configuration is primarily managed through control cards within the JCL, specifying tablespaces, indexes, and options for the reorganization process.

A typical invocation involves specifying the DSNUTILB command with appropriate parameters to identify the tablespace or index to be reorganized. For example: ``` //SYSIN DD * REORG TABLESPACE DSN8K10.DSN8S10E COPYDDN(COPY1,COPY2) STATISTICS /* ```

Rapid Reorg uses standard Db2 catalog tables to gather information about the objects being reorganized. It interacts directly with Db2's data storage to perform the reorganization.

While Rapid Reorg primarily uses JCL for control, it leverages Db2's standard interfaces for data access and manipulation during the reorganization process.

Rapid Reorg reduces the downtime associated with Db2 reorganization, improving application availability. Faster reorganization translates to reduced operational costs and increased efficiency.

By reorganizing tablespaces and indexes, Rapid Reorg helps improve query performance. This leads to faster response times for applications and better overall system performance.

The ability to perform online reorganization (via CA OnlineReorg functionality) minimizes the impact on users, allowing them to continue accessing and updating data during the reorganization process.

Rapid Reorg leverages Db2's existing security mechanisms for data access and manipulation. It operates within the security context established for Db2.

Rapid Reorg relies on Db2's audit facilities to track reorganization activities. These audit logs can be used to monitor and verify the integrity of the reorganization process.

Access to Rapid Reorg functionality is controlled through Db2's standard authorization mechanisms. Users must have the necessary privileges to execute the utility and access the tablespaces and indexes being reorganized.

Rapid Reorg generates standard Db2 messages and return codes, which can be monitored using standard z/OS and Db2 monitoring tools. These messages provide information about the progress and status of the reorganization.

Configuration parameters are primarily set through JCL control cards. These parameters specify options such as the tablespace to be reorganized, the number of parallel tasks to use, and whether to collect statistics.

Rapid Reorg integrates with standard z/OS scheduling and workload management tools. This allows you to prioritize reorganization jobs and manage resource allocation.