Data and system flow of DEDB Unload
The unload processor (FABCUR1) is a z/OS® batch program that controls and manages the unloading of one or more DEDB areas to QSAM data sets. It achieves significant performance improvements (that is, reduced elapsed time) by implementing a parallel processing environment and by reducing the number of EXCPs issued.
If you enable the IMS catalog and the IMS management of ACBs, ACB definitions are retrieved from the IMS directory instead of from OLDACB and NEWACB libraries.
The following figure shows the flow of the unload procedure.
Load modules
Among the DEDB Unload/Reload modules, two are used for unload. The following table lists these modules.
Load module name | Function |
---|---|
FABCUR1 | Controls and manages unload processing |
FABCUR1U | Subtask to extract segment data |