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Message flow control

 

Message flow control is a task that involves the setting up and maintenance of message routes between queue managers. This is very important for routes that multi-hop through many queue managers.

You control message flow using a number of techniques that were introduced in Making your applications communicate. If your queue manager is in a cluster, message flow is controlled using different techniques, as described in the WebSphere MQ Queue Manager Clusters book. If your queue managers are in a queue sharing group and intra-group queuing (IGQ) is enabled, then the message flow can be controlled by IGQ agents, which are described in Intra-group queuing .

This chapter describes how you use your system’s queues, alias queue definitions, and message channels to achieve message flow control.

You make use of the following objects:

The queue manager and queue objects are described in the WebSphere MQ System Administration Guide book for WebSphere MQ for UNIX systems, and Windows systems, in the WebSphere MQ for iSeries System Administration Guide book for WebSphere MQ for iSeries™, in the WebSphere MQ for z/OS Concepts and Planning Guide for WebSphere MQ for z/OS, or in the MQSeries System Management Guide for your platform. Message channels are described in Message channels. The following techniques use these objects to create message flows in your system:

 

Note

All the concepts described in this chapter are relevant for all nodes in a network, and include sending and receiving ends of message channels. For this reason, only one node is illustrated in most examples, except where the example requires explicit cooperation by the administrator at the other end of a message channel.

Before proceeding to the individual techniques it is useful to recap on the concepts of name resolution and the three ways of using remote queue definitions. See More about intercommunication.

 

Parent topic:

WebSphere MQ distributed-messaging techniques


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