MQ Series

- Sending messages from one queue manager to another queue manager is known as inter communication

- The receiving queue manager may by on the same machine or another.

- It could be executing on the platform where the local queue manager exists

- It could be executing on another platform supported by Web Sphere MQ

- The participating entities are

o Message channels, message channel agents

o Transmission queues, channel initiators and listeners

o Programs those are co-existing

- Initiation queues are used for triggering

- A trigger message is put by a queue manager on an initiation queue when a trigger is occurred

- Logical combinations are part of a trigger event which is detected by the queue manager

- Transmission queues store messages which are destined for a specific remote queue manager

- At least one transmission queue must be defined for each remote queue manger

- The messages are directly be sent to the remote queue manager

- When a queue is not delivered to their correct destinations, then it is called as Dead Letter queue

- When the destination queue is full, the dead-letter queue occurs. It is identified by SYSTEM.DEAD.LETTER.QUEUE.

- A dead-letter queue is defined for distributed queuing, on each queue manager