GDG Support

The Automation Engine also supports Generation Data Groups (GDG). This type of file management can be used in FileSystem event objects and the script element GET_EVENT_INFO.

FileSystem Event

A standard function of this object type is to check file-system values. It is also possible to trigger an event if a GDG generation is closed. Enter an z/OS host in the File System Event tab and select the option Automatically in the timer control of the Event page in order to use this function.

The closing of a new generation is waited for if GDG(+1) has been specified, which is normally the case. If you specify GDG with +/-0 (+0, +00, +000, -0, -00, -000), the closing of the current generation is waited for.

Example:

PAYROLL               Name of the GDG
DSNAME=PAYROLL(0)     This week's generation data set
DSNAME=PAYROLL(-1)    Last week's generation data set
DSNAME=PAYROLL(-2)    Generation data set of two weeks ago

Script element GET_EVENT_INFO

This script function retrieves the name of a generation which can then be processed.

Extract of an example:

:SET &FILENAME# = GET_EVENT_INFO (FILENAME)
:SET &HND# = PREP_PROCESS_FILE ("MVSHOST", &FILENAME#)

Configuration

Some specifications are required in order to use GDG in your AE system:

Activate the parameter smfwrite= in the INI file of the z/OS agent.

(CONSOLE)
start=UCXEM25
smfwrite=1

Activate the exit modules IEFU83 and IEFU84.
The entries 14, 15, 30 and 64 must be logged.