Configuration 2
Configuration 2 describes how queue-sharing groups and intra-group queuing
can be used, with no effect on the back end payroll server application, to
transfer messages between queue managers QMG1 and QMG3. This configuration
removes the need for channel definitions between queue managers QMG2 and QMG3
because intra-group queuing is used to transfer messages between these two
queue managers.
The flow of operations is as follows:
- A query is entered using the payroll request application connected to
queue manager QMG1.
- 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.
- Sender channel (S) on queue manager QMG1 delivers the query to the partner
receiver channel (R) on queue manager QMG2.
- Receiver channel (R) on queue manager QMG2 puts the query on to queue
PAYROLL on queue manager QMG3. As queue PAYROLL on QMG3 resolves to shared
transmission queue SYSTEM.QSG.TRANSMIT.QUEUE, the query is put on to shared
transmission queue SYSTEM.QSG.TRANSMIT.QUEUE.
- IGQ agent on queue manager QMG3 retrieves the query from shared transmission
queue SYSTEM.QSG.TRANSMIT.QUEUE, and puts it on to local queue PAYROLL on
queue manager QMG3.
- The payroll server application connected to queue manager QMG3 retrieves
the query from local queue PAYROLL, processes it, and generates a suitable
reply.
Note:
The payroll query example transfers small messages only. If
you need to transfer both persistent and non-persistent messages, a combination
of Configuration 1 and Configuration 2 can be established, so that large messages
can be transferred using the distributed queuing route, while small messages
can be transferred using the potentially faster intra-group queuing route.