Reorganization Steps

CA IDMS/DB Reorg performs reorganization incrementally by executing a series of steps. This incremental approach to reorganization makes possible several operational benefits.

Step-by-step reorganization permits you to stop and restart the utility after completion of any step. By using the restart feature (see STOPAFTER and RESTART Parameters), you can interrupt processing and restart it later.

The interruption feature gives you the ability to use the reorganization steps as milestones when monitoring the reorganization process from the operator console or TSO terminal and to predict how long reorganization takes. See System Output for complete information on the status display available at the operator console.

CA IDMS/DB Reorg must execute each reorganization step sequentially. While you cannot eliminate a reorganization step, an understanding of the function of each step can help you to:

Allocate work files and estimate their sizes efficiently
Stop and restart the utility
Back up files
Overlay the old database with the new database to conserve disk space
Perform other operational functions, such as the initial program load (IPL) of the system

Reorganization Steps and Their Logical Sequence: