Types Of Queues

Types Of Queues:
1. Predefined Queues
2. Dynamic Queues

Predefined Queues 
1. Local Queue
The queue definition object, created when you define a local queue, holds the definition information of the queue as well as the physical messages put on the queue.
2. Alias Queue
An alias queue is a WebSphere MQ object that you can use to access another queue. The queue resulting from the resolution of an alias name (known as the base queue) can be a local queue, the local definition of a remote queue, or a shared queue (a type of local queue only available on WebSphere MQ for z/OS).
Note: An alias cannot resolve to another alias
3. Remote Queue
To a program, a queue is remote if it is owned by a different queue manager to the one to which the program is connected. Where a communication link has been established, a program can send a message to a remote queue. A program can never get a message from a remote queue.
4. Model Queue
A model queue is a template of a queue definition that you use when creating a dynamic queue. You specify the name of a model queue in the object descriptor (MQOD) of your MQOPEN call. Using the attributes of the model queue, the queue manager dynamically creates a local queue for you.

Dynamic Queues:
In MQSeries to create dynamic queues must define model queue. It works as a template.

1. Temporary Dynamic Queue

• They hold non-persistent messages only
• They are non-recoverable
• They are deleted when Queue manager restarted
• These will created when application issue MQOPEN call on model queue and deleted for application MQCLOSE

2. Permanent Dynamic Queue

• They hold persistent and non-persistent messages
• They are recoverable in the event of system failure
• They are deleted when an application successfully closes the queue using the MQCO_DELETE or MQCO_DELETE_PURGE

• How To Define Model Queue To Create Temporary Dynamic Queue

                 DEFINE QMODEL(Model_Queue_Name) DEFTYPE(TEMPDYN)

• How To Define Model Queue To Create Permanent Dynamic Queue

                  DEFINE QMODEL(Model_Queue_name) DEFTYPE(PERMDYN)