This IBM Redbooks publication provides IMS performance monitoring and tuning information. This book differs from previous IMS performance and tuning IBM Redbooks in that there is less emphasis on the internal workings of IMS and more information about why and how certain options can affect the performance of IMS. You should be able to find valuable new information and perhaps validate things you might have questioned. Hardware and software characteristics are constantly changing, but hopefully the information that you find here provides a basis to help you react to change and to keep your IMS running efficiently. In this book, we introduce methods and tools for monitoring and tuning IMS systems, and in addition to IMS TM and DB system-wide performance considerations, we dedicate separate chapters for application considerations, IMS and DB2 interoperability, the Parallel Sysplex environment, and On Demand considerations.

This IBM Redbooks publication provides an overview of the new functions and enhancements in IBM Information Management System (IMS) Version 9. IMS Version 9 contains over 50 enhancements, in all areas of the product. that address availability, scalability, capacity, usability, manageability, operations, on demand business, and application development requirements from its huge customer base. All of the enhancements in this new version resulted from specific customer requirements. The major enhancements include: Improved database availability for HALDB databases is provided by the long-awaited online reorganization (OLR) enhancement. The functionality of the IMS Connect product is included as an integrated function of IMS. DBRC provides a new API that allows assembler programs to query the RECON. IMS Java users will have new JDBC SQL calls and DLI Model Utility support for retrieving existing IMS data in XML format as well as storing, indexing, searching, and retrieving valid XML documents into new or existing IMS databases. We describe these enhancements and all other major changes in IMS Version 9. This book gives you the essential information that you need when you are migrating your IMS systems to IMS Version 9.