InfoReorg for DB2 on z/OS Modernization Guide

InfoReorg is primarily used to reorganize DB2 tablespaces to improve performance and reclaim space. Common operations include reorganizing tablespaces, rebuilding indexes, and managing partition datasets.

InfoReorg uses control statements within JCL (Job Control Language) to define the reorganization process. Configuration files are not typically used; instead, parameters are passed directly within the JCL.

A basic reorganization job includes specifying the tablespace to be reorganized and any desired options, such as online or offline processing. For example: ``` //REORG EXEC PGM=INFOREORG //STEPLIB DD DSN=your.inforeorg.loadlib,DISP=SHR //SYSIN DD * REORG TABLESPACE database.tablespace OFFLINE ```

InfoReorg primarily uses batch processing via JCL. There are no REST or SOAP APIs exposed. Integration typically involves scheduling and monitoring JCL jobs.

InfoReorg operates directly on DB2 datasets. It reads data from the tablespace, reorganizes it according to the specified parameters, and writes the reorganized data back to the tablespace. It uses standard DB2 utilities for interacting with the database.

The main components include the execution program (INFOREORG), which processes the reorganization requests defined in the JCL. It interacts directly with DB2's data management services.

InfoReorg uses standard DB2 storage mechanisms, including VSAM datasets for tablespaces and indexes. It does not introduce any new or proprietary storage mechanisms.

InfoReorg communicates with DB2 using standard DB2 interfaces and control blocks. It does not require specific ports or network configurations beyond those required for DB2 itself.

InfoReorg reduces fragmentation and improves data contiguity, leading to faster data access and improved query performance. This translates to reduced CPU consumption and faster application response times.

By optimizing data storage, InfoReorg reduces the amount of I/O required to access data. This can lead to significant cost savings, especially in environments with high transaction volumes.

InfoReorg helps maintain optimal database performance, ensuring that applications meet service level agreements (SLAs). This reduces the risk of performance-related outages and disruptions.

InfoReorg leverages DB2's security mechanisms for authentication and authorization. It does not introduce its own authentication methods. User access is controlled through DB2's grant and revoke privileges.

InfoReorg relies on DB2's access control model, which is primarily ACL (Access Control List) based. Permissions are granted to users or roles for specific database objects.

InfoReorg does not perform encryption itself. Encryption is handled by DB2's encryption features, if enabled. InfoReorg processes data in the same encrypted or unencrypted state as it exists in DB2.

InfoReorg generates standard DB2 audit logs, which can be used to track reorganization activities. These logs include information about who performed the reorganization, when it was performed, and what objects were affected.

InfoReorg is administered through JCL. Parameters are specified in the JCL to control the reorganization process. There is no separate GUI or web console.

User management is handled entirely by DB2. InfoReorg uses the DB2 user accounts and permissions to control access to reorganization functions.

Key configuration parameters include the tablespace to be reorganized, the type of reorganization (online or offline), and various performance tuning options. These parameters are specified in the JCL.

InfoReorg generates standard DB2 SMF (System Management Facilities) records, which can be used for monitoring and logging. These records provide information about the performance and resource consumption of the reorganization process.