Dump domain (DU)

The dump domain is responsible for producing storage dumps and for handling the associated data sets and status in the CICS® system. Two types of dump are produced:

Transaction dumps
These are written to the CICS-managed BSAM data sets DFHDMPA and DFHDMPB. They consist of the storage areas related to a particular transaction.
System dumps
CICS uses the MVS™ SDUMP facility to dump the entire CICS region to an MVS SYS1.DUMP data set.

The two dump tables (one for each dump type) are indexed by the dump code and contain details of the options required for each request.

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