Introduction to channels and containers

Channels and containers provide a method of transferring data between CICS® programs, in amounts that exceed the 32 KB limit that applies to communication areas (COMMAREAs).

Each container is a named block of binary (BIT) or character (CHAR) data that is not limited to 32 KB. Containers are grouped together in sets called channels.

The channel and container model has several advantages over the communication areas (COMMAREAs) used by CICS programs to exchange data:
When you are using channels and containers in preference to COMMAREAs, note that:
For more information about using channels and containers see the following topics:

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Timestamp icon Last updated: Tuesday, 19 November 2013


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