The channel-to-channel (CTC) adapter is an input/output (I/O) device used by a program in one system to communicate with a program in another system. CTC adapters are used to communicate between the CA Vtape started tasks on z/OS and the CA Cloud Storage for System z Server running on the Linux system. The advantage of using CTCs is that the data can be moved between hosts in a way that is fast and utilizes the fewest general processer resources.
The IBM System z ESCON and FICON Channel-to-Channel Reference Guide and the z/OS Hardware Configuration Definition User’s Guide contain basic information, definition, and configuration information for CTCs.
CA Cloud Storage for System z combines multiple CTC addresses between hosts to facilitate multiplexing read and write operations on behalf of a variable number of virtual tape drives. CA Cloud Storage for System z requires two CTC addresses between each instance of CA Vtape on z/OS and Linux on System z.
Note: For a more detailed discussion of the CTC as well as sample configurations, see the CA Cloud Storage for System z Linux Installation and Configuration Guide.
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