IBM MQ for z/OS concepts

Some of the concepts used by IBM MQ for z/OS are unique to the z/OS platform. For example, the logging mechanism, the storage management techniques, unit of recovery disposition, and queue sharing groups are provided only with IBM MQ for z/OS. Use this topic for further information about these concepts.

  • The queue manager on z/OS
    Before we can let the application programs use IBM MQ on your z/OS system, we must install the IBM MQ for z/OS product and start a queue manager. The queue manager owns and manages the set of resources that are used by IBM MQ.
  • The channel initiator on z/OS
    The channel initiator provides and manages resources that enable IBM MQ distributed queuing. IBM MQ uses Message Channel Agents (MCAs) to send messages from one queue manager to another.
  • Terms and tasks for managing IBM MQ for z/OS
    Use this topic as an introduction to the terminology, and tasks that are specific to IBM MQ for z/OS.
  • Shared queues and queue sharing groups
    We can use shared queues and queue sharing groups, to implement high availability of IBM MQ resources. Shared queues and queue sharing groups are functions unique to IBM MQ for z/OS on the z/OS platform.
  • Intra-group queuing
    This section describes intra-group queuing, an IBM MQ for z/OS function unique to the z/OS platform. This function is only available to queue managers defined to a queue sharing group.
  • Storage management on z/OS
    IBM MQ for z/OS requires permanent and temporary data structures and uses page sets and memory buffers to store this data. These topics give more details on how IBM MQ uses these page sets and buffers.
  • Logging in IBM MQ for z/OS
    IBM MQ maintains logs of data changes and significant events as they occur. These logs can be used to recover data to a previous state if required.
  • Defining the system on z/OS
    IBM MQ for z/OS uses many default object definitions, and provides sample JCL to create those default objects. Use this topic to understand these default objects, and the sample JCL.
  • Recovery and restart on z/OS
    Use the links in this topic to find out about the features of IBM MQ for z/OS for restart and recovery.
  • Security concepts in IBM MQ for z/OS
    Use this topic to understand the importance of security for IBM MQ, and the implications of not having adequate security settings on the system.
  • Availability on z/OS
    IBM MQ for z/OS has many features for high availability. This topic describes some of the considerations for availability.
  • Monitor and statistics on IBM MQ for z/OS
    IBM MQ for z/OS has a set of facilities for monitoring the queue manager, and gathering statistics.
  • Unit of recovery disposition on z/OS
    Certain transactional applications can use a GROUP, rather than a QMGR, unit of recovery disposition when connected to a queue manager in a queue sharing group (QSG) by specifying the QSG name when they connect instead of the queue manager name. This allows transaction recovery to be more flexible and robust by removing the requirement to reconnect to the same queue manager in the QSG.

Parent topic: IBM MQ Technical overview


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