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The DQM channel control function

 

The channel control function provides the interface and function for administration and control of message channels between systems.

It consists of commands, programs, files for the channel definitions, and a storage area for synchronization information. The following is a brief description of the components.

• The channel commands are a subset of the WebSphere MQ Commands (MQSC).

• You use MQSC and the control commands to:

  • Create, copy, display, change, and delete channel definitions

  • Start and stop channels, ping, reset channel sequence numbers, and resolve in-doubt messages when links cannot be re-established

  • Display status information about channels

• Channel definitions on UNIX platforms are held in the following subdirectories:

  • /var/mqm/qmgrs/../auth/channels

  • /var/mqm/qmgrs/../auth/channels/@MANGLED

  • /var/mqm/qmgrs/../auth/clntconn

  • /var/mqm/qmgrs/../auth/clntconn/@MANGLED

  • /var/mqm/qmgrs/../channels

  • /var/mqm/qmgrs/../clntconn

• Channel definitions on Windows platforms are held in the following subdirectories:

  • C:\\IBM\WebSphere MQ\qmgrs\..\channels

  • C:\\IBM\WebSphere MQ\qmgrs\..\clntconn

  assuming that the product is installed in the default location.

• Channel definitions on iSeries™ are held in the following subdirectories:

  • /QIBM/UserData/mqm/qmgrs/../auth/channels

  • /QIBM/UserData/mqm/qmgrs/../auth/channels/&mangled

  • /QIBM/UserData/mqm/qmgrs/../auth/clntconn

  • /QIBM/UserData/mqm/qmgrs/../auth/clntconn/&mangled

  • /QIBM/UserData/mqm/qmgrs/../channels

  • /QIBM/UserData/mqm/qmgrs/../clntconn

• A storage area holds sequence numbers and logical unit of work (LUW) identifiers. These are used for channel synchronization purposes.

 

Parent topic:

Monitoring and controlling channels on distributed platforms

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