FABHFSU unload utility

The FABHFSU unload utility unloads IMS databases and provides compatibility with FSU II. FABHFSU can produce multiple unloaded output data sets. Each unloaded data set can contain different combinations of segments in different formats.

FABHFSU has two different modes in which the different types of unload operations are run: the standard mode and the Parallel Scan Facility (PSF) mode. In both modes, the FABHFSU runs as an HSSR application program, and makes full use of HSSR Engine.

Tip: To understand the system structure and the data flow in HSSR application jobs, see IMS High Performance Unload system structure.

FABHFSU accepts user requests through the CARDIN data set. HSSROPT options and HSSRCABP options can also be specified as input to the FABHFSU program. A Segment Statistics report is produced in addition to the standard outputs produced by HSSR Engine.

In the following topics, the basic functions of FABHFSU run in the standard mode are explained. For instructions to run FABHFSU in Parallel Scan Facility mode (PSF mode), see Parallel Scan Facility of FABHFSU.

For information about compatibility with FSU II, see Compatibility with FSU II.

You can also use FABHFSU to unload a corrupted database. For more information, see Utility options for unloading corrupted databases.

For the restrictions that apply to FABHFSU jobs, see Restrictions for IMS High Performance Unload.