Message queues

When a message is sent to a procedure, a program, or a system user, it is placed on a message queue associated with that procedure, program, or user. The procedure, program, or user sees the message by receiving it from the queue.

The IBM® i operating system provides message queues for the following items:

• Each workstation on the system
• Each user enrolled on the system
• The system operator
• The system history log

Additional message queues can be created to meet any special application requirements. Messages sent to message queues are kept, so the receiver of the message does not need to process the message immediately.