This is a sidebar to the article "Piloting IMS Through the 21st Century" by John McKenny. To read the article, click here.
Partitioning tools make it possible to increase the IMS database capacity without having to make application changes. A partitioned database increases capacity and improves database performance and availability. Here are some capabilities partitioning tools can provide:
- Improve capacity management and performance with the ability to support multiple secondary indexes without degrading performance
- Partition eligible databases and return to a non-partitioned state if necessary
- Provide an easy migration to partitioned databases and gain the capacity benefits of partitioning
- Support Database Recovery Control (DBRC) without having to complete DBRC registration
- Support the use of data set groups, so that infrequently used data can be isolated, thereby expanding capacity for higher-traffic data. This increases capacity and improves database performance.
- Increase database availability by reducing run-times for reorgs, image copies, recoveries, and other related tasks
- Support logical relationships, including relationships to non-partitioned databases.