Configuration 3

Configuration 3 describes how queue sharing groups and shared queues can be used, with no effect on the back-end payroll server application, to transfer messages between queue managers QMG1 and QMG3.

Configuration 3 shows a distributed queuing system that uses queue sharing groups and shared queues to transfer messages between queue manager QMG1 and queue manager QMG3.

The flow of operations is:

1. A query is entered using the payroll request application connected to queue manager QMG1.
2. The payroll request application puts the query on to remote queue PAYROLL.QUERY. As queue PAYROLL.QUERY resolves to transmission queue QMG2, the query is put on to transmission queue QMG2.
3. Sender channel (S) on queue manager QMG1 delivers the query to the partner receiver channel (R) on queue manager QMG2.
4. Receiver channel (R) on queue manager QMG2 puts the query on to shared queue PAYROLL.
5. The payroll server application connected to queue manager QMG3 retrieves the query from shared queue PAYROLL, processes it, and generates a suitable reply.

This configuration is certainly the simplest to configure. However, distributed queuing or intra-group queuing would need to be configured to transfer replies (generated by the payroll server application connected to queue manager QMG3) from queue manager QMG3 to queue manager QMG2, and then on to queue manager QMG1. (See What the queue sharing group example for z/OS shows for the configuration used to transfer replies back to the payroll request application.)

No definitions are required on QMG3.

• Configuration 3 definitions
  The definitions required for Configuration 3 are as follows (note that the definitions do not take into account triggering, and that only channel definitions for communication using TCP/IP are provided).

Parent topic: Example MQ configuration for z/OS using intra-group queuing