Using ICEGENER as a replacement for IEBGENER

At many sites, the copy utility IEBGENER is a frequently used program. Actions that improve its performance greatly benefit user productivity and resource utilization.

DFSORT's ICEGENER facility allows qualifying IEBGENER jobs to be routed to the more efficient DFSORT copy function. In most cases, using the DFSORT copy function instead of IEBGENER requires less CPU time, less elapsed time, and results in fewer EXCPs (see Figure 1). If the DFSORT copy function cannot be used, DFSORT automatically transfers control to the IEBGENER utility. You can install ICEGENER so that your existing IEBGENER jobs do not require changes.

These are some of the circumstances that prevent the use of ICEGENER:

A SYSIN DD statement other than SYSIN DD DUMMY is present.
Detection of an error before DFSORT has started the copy operation
A condition listed in DFSORT message ICE160A as follows:
1

The SYSUT1 or SYSUT2 data set was BDAM.

2

FREE=CLOSE was specified.

3

An attempt to open a data set caused a system error.

4

The SYSUT1 or SYSUT2 data set resided on an unsupported device.

5

ASCII tapes had the following parameters:
(LABEL=AL or OPTCD=Q) and RECFM=D and BUFOFF¬=L

or

(LABEL=AL or OPTCD=Q) and RECFM¬=D and BUFOFF¬=0

6

An attempt to read the DSCB for the SYSUT1 data set caused an error.

7

An attempt to read the DSCB for the SYSUT2 data set caused an error.

8

The SYSUT1 data set had keyed records.

9

User labels were present.

Under such circumstances, DFSORT transfers control to IEBGENER. However, IEBGENER may not be able to process the copy application either.

See z/OS DFSORT Installation and Customization for complete details on installing ICEGENER as an automatic replacement for IEBGENER.