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, a file 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
• The channel definition file (CDF), amqrfcda.dat:
  • Is indexed on channel name
  • Holds channel definitions
• A storage area holds sequence numbers and logical unit of work (LUW) identifiers. These are used for channel synchronization purposes.