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IMS V9 Includes Integrated TCP/IP Support

IMS Version 9 is the first version to include integrated TCP/IP connection management support

IMS Version 9 is the first version to include integrated TCP/IP connection management support

Version 9 of the IBM* IMS*, which is the current release of IBM's premier transaction and hierarchical database management system, is the first version of IMS to include integrated TCP/IP connection management support.

Prior to IMS V9, support for TCP/IP connectivity with IMS was provided solely by the separately sold IBM tool IMS Connect for z/OS*. Now in IMS V9, the TCP/IP interface provided by IMS Connect is integrated into the core IMS product, including IMS Connect's TCP/IP socket support, message manipulation support between the TCP/IP client and IMS, as well as support for local, non-TCP/IP access to IMS for applications running on the same OS/390* or z/OS image.

With the initial integration of the IMS Connect functionality into the IMS product, and subsequent authorized program analysis report (APAR) updates to that functionality, IMS has enhanced its TCP/IP interface to provide even more robust and flexible TCP/IP connection support.

Most recently, IMS has released significant updates to the IMS Connect function for IMS V9, including reroute support for send-only transaction output in April 2006; XML-to-COBOL message conversion support in October of 2006; and the ability to retrieve asynchronous output from an alternate client ID in February 2007.

With these recent updates, which are discussed in this article, IMS is now more than ever designed for Web-enablement in today's on demand world.

This article focuses on the three newest enhancements: IMS Connect XML support, rerouting output for send-only transactions, and retrieving output from alternate IMS queues. Figure 1 shows possible product configurations used with IMS Connect.

New Features for IMS Connect in IMS V9

The latest enhancements to the support for TCP/IP clients and connectivity provided by IMS V9 include:

  • Integrated XML support
  • Improved management of asynchronous message output, including:
    • Reroute and purge options for asynchronous and program-to-program switch output
    • Output sharing using the IMS Open Transaction Manager Access (OTMA) super member feature
    • Port affinity for asynchronous output
    • Retrieval of messages from alternate IMS queue names
    • Improved support for z/OS Sysplex Distributor
  • New options for the send-only transaction protocol, including:
    • Guaranteed serial delivery of send-only input
    • Acknowledgement (ACK) response option for send-only input
    • Reroute option for send-only output

Ben Johnson is an IBM information developer. He has been writing about IMS since 2003, focusing on both IMS database administration and IMS communications and connections, with a particular interest in OTMA and IMS Connect. He can be contacted at

Jack Yuan is a senior software engineer for IMS development. He can be contacted at



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