TDQUEUE resources

A TDQUEUE definition defines the attributes of a transient data queue.

The following transient data resources can be managed using RDO:
  • Intrapartition
  • Extrapartition
  • Indirect
  • Remote

Intrapartition definitions contain attributes that provide information about recovery characteristics, trigger levels, associated transactions, facilities, and userids.

Extrapartition definitions contain information about the associated QSAM data set, and the number of buffers that are to be used.

Indirect definitions identify the underlying queue name.

Remote definitions contain the name of the remote system and the name by which the queue is known on that remote system.

Before a transient data queue can be used by an active CICS® system, you must install its definition in the running system. CICS uses the definition to access the data set associated with the queue, and records the number of read and write operations on the queue.

Remote transient data queues can be defined using the CEDA transaction in one of two ways:
  • If the queue TYPE is omitted and data is entered into only the REMOTE ATTRIBUTES section of the definition, a remote definition will be created.
  • If a TYPE of INTRA or EXTRA is specified and the REMOTE ATTRIBUTES section is completed, both a local and a remote resource will be established at the same time.

    See Figure 1 for an example of defining a dual-purpose transient data resource definition.