Communication between CA 1 and CA Dynam/T is accomplished through the use of queues allocated on a shared DASD device. Two queues are required to support the interface. Each system has a sending queue used to send transactions to the other system, and a receiving queue used to receive transactions from the other system; the sending queue for one system serves as the receiving queue for the other. Transactions are placed on the queue by one system and processed by the other.
Queue serialization between CA 1 and CA Dynam/T is accomplished using a technique referred to as record locking. This method allows serialization of access to the queue without using ENQs or hardware RESERVEs.
Queues are allocated on a DASD device and then formatted using the utility DYNFORMT. Another utility, the DYNSYNC, is provided to aid in analyzing and resolving queue-related problems.
Note: For more information about these utilities, see the Utilities and Reports Reference Guide.
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