To complete this task, you must have completed the following tasks:
If you created message flows in Version 5.0 and configured them to use control messages, and wish to continue using control messages, see Configuring a broker environment to send control messages in this topic. Connections between the AggregateControl and AggregateReply nodes created in earlier versions of the product will be ignored in Version 6.0 unless you complete this task.
For a working example of aggregation (without the use of control messages), see the Airline Reservations sample.
By default, in WebSphere Message Broker Version 6.0 any connections from the control terminal of the AggregateRequest node to the AggregateReply node are ignored. For these connections to be active, create the MQSI_AGGR_COMPAT_MODE environment variable in the broker's environment. By default the environment variable does not exist. The existence of the environment variable means connections from the AggregateControl node are active, regardless of the value the environment variable is set to.
When the MQSI_AGGR_COMPAT_MODE environment variable has not been created, the default behavior for aggregation fan-out flows will be used. If the control terminal of the AggregateControl node is connected, either directly or indirectly to the in terminal of the AggregateReply node, this connection will be ignored and no control message will be sent.
If the MQSI_AGGR_COMPAT_MODE environment variable is created, the default behavior for aggregation fan-out flows will not be used, allowing you to send control messages from the AggregateControl node to the AggregateReply node. If the Control terminal of the AggregateControl node is connected, either directly or indirectly to the In terminal of the AggregateReply node, as described in Creating the aggregation fan-out flow, this connection will be recognized and a control message will be sent. Please note that this is not the optimal configuration and may decrease performance.
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