System Generation Statements › QUEUE Statement—Defines DC/UCF System Queues

QUEUE Statement—Defines DC/UCF System Queues

The QUEUE statement is used to define queues to a DC/UCF system. A queue is a disk work area that is shared by all tasks on all DC/UCF terminals and by batch programs. Queues might be used to collect records for subsequent printing at a centrally located printer. Entries, or queue records, are directed to queues by user programs. You do not have to define queues during system generation in order for user programs to allocate and access queue records. However, queues defined with the QUEUE statement can be assigned the following processing enhancements:

• When the number of entries in a queue reaches a specified threshold, the DC/UCF system will invoke a task defined to process the queue entries.
• When the number of entries in a queue reaches a specified upper limit, the DC/UCF will not permit further entries to be directed to the queue.

Note: Data sharing groups provide the ability to share DC queues between members of the group. This enables online tasks executing in different group members to communicate with one another, as if they were executing within the same CA IDMS system. For more information, see the CA IDMS System Operations Guide.