What is a GDG
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Answer / aannie
A generation data set is one of a collection of
successive, historically related, cataloged data sets,
known as a generation data group (GDG). Each data set
within a generation data group is called a generation data
set (GDS) or generation.
? Processing Generation Data Groups
? Absolute Generation and Version Numbers
? An absolute generation and version number is used
to identify a specific generation of a generation data
group.
? The generation and version numbers are in the
form GxxxxVyy, where xxxx is an unsigned 4-digit decimal
generation number (0001 through 9999) and yy is an unsigned
2-digit decimal version number (00 through 99)
? Relative Generation Number
As an alternative to using absolute generation and
version numbers when cataloging or referring to a
generation, we can use a relative generation number.
For example, A.B.C(-1). A.B.C(+1), or A.B.C(0).
| Is This Answer Correct ? | 10 Yes | 1 No |
Answer / jegadeesan ramu
Used to keep track of the records in chronological order to
create gdg base name must be created by using IBM utility
IDCAMS
| Is This Answer Correct ? | 3 Yes | 1 No |
Answer / dhan
Generation Data Groups (GDGs) are a group of datasets related to each other by a common name.
GDG generation file is referred by a GDG base name.
Each generation data set is distinguished by others by the generation number.
https://youtu.be/hMbB20WKmBg
https://youtu.be/3N17dh7BAaQ
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Answer / ks
It is nothing but Generation data group keeps the track of
the new generations by deleting the older ones based on the
options
| Is This Answer Correct ? | 1 Yes | 2 No |
What is the DD statement for a output file?
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Hi, Say I have 10 flat files and I want to copy all these 10 flat files to a GDG versions flat files (I have GDG base: FDWS01.TEST.RESTORE) in one shot. Can we do that in one shot using a JCL. May be by using IEBGENER. It's a bit urgent. So anyone's fast rely would be appreciated.. Thanks in advance.. 10 flat files ----------------------------------- FDWS01.SUB.RESTORE1 FDWS01.SUB.RESTORE2 FDWS01.SUB.RESTORE3 ; ; FDWS01.SUB.RESTORE10 TO GDG versions ----------------------- FDWS01.TEST.RESTORE.G0001V00 FDWS01.TEST.RESTORE.G0002V00 FDWS01.TEST.RESTORE.G0003V00 ; ; FDWS01.TEST.RESTORE.G0010V00
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how GDGs are concatinated?
how do u see jobs submitted before ur job ?
if we want to use a gdg which is already created by some job, then how to use the reference of the last generation in a jcl?
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COBOL 
