IMS Queue Control Facility architecture

IMS Queue Control Facility consists of several components. Some of these components are initiated by your input on the ISPF interface, and others are initiated by JCL jobs that you must customize for your environment.

The main components of IMS Queue Control Facility include:

  • The IMS Queue Control Facility server
  • Queue Threshold and Queue Space Usage Notification
  • Extensions
  • The queue structures
  • The ISPF front-end interface
  • Batch jobs, PROCs, and control members that contain control statements

The following diagram depicts the relationships of the main components of IMS Queue Control Facility.

Figure 1. The main components of IMS Queue Control Facility
This diagram shows the relationships of the components of IMS Queue Control Facility and this diagram is described in the surrounding text.

IMS Queue Control Facility consists of a batch address space, a TSO client address space, a server address space, and an IMS Queue Control Facility extension (which runs in the IMS control region address space).

Communication between the various components is through the IMS structure call interface (IMS SCI). The IMS Queue Control Facility extension performs the actual manipulation of the IMS queues.

You can access the extensions through either a batch interface (using JCL) or through a TSO client/server interface.