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  1. Preface
  2. Summary of PowerExchange New Features and Changes
  3. PowerExchange Installation and Upgrade
  4. PowerExchange Agent
  5. PowerExchange Client for PowerCenter
  6. PowerExchange Condense
  7. PowerExchange Listener
  8. PowerExchange Logger for Linux, UNIX, and Windows
  9. PowerExchange Navigator
  10. PowerExchange Monitoring and Tuning
  11. PowerExchange Utilities
  12. PowerExchange for Adabas
  13. PowerExchange for CA Datacom
  14. PowerExchange for DB2 for i
  15. PowerExchange for DB2 for Linux, UNIX, and Windows
  16. PowerExchange for DB2 for z/OS
  17. PowerExchange for CA IDMS
  18. PowerExchange for IMS
  19. PowerExchange for Microsoft SQL Server
  20. PowerExchange for MySQL
  21. PowerExchange for Oracle
  22. PowerExchange for PostgreSQL
  23. PowerExchange for VSAM and Flat Files
  24. PowerExchange ODBC

Support for IMS Command Code A

Support for IMS Command Code A

PowerExchange now uses IMS command code A to improve the performance of PowerCenter sessions that write to IMS 11 and later target databases that use ODBA, BMP, or DL/I batch access. The use of command code A also reduces overhead and CPU usage on the IMS system. This change applies to PowerCenter bulk and CDC sessions that use a PWX NRDB Batch application connection to connect to an IMS target. For this feature to function properly, you must apply the APARs that are documented for your IMS version in the "Installation Planning" chapter of the
PowerExchange 10.2 Installation and Upgrade Guide
.
Prior to this change, when the session ran, IMS wrote a checkpoint after every commit for an Update, lookup, or other operation that required IMS to reset its position to the beginning of the database. Also, the session ignored the
Commit Interval
session property. The excessive checkpointing degraded performance and increased resource usage.

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