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What is the difference between a PDS member and a GDG
Generation ? Is it only this, that with a generation we can
use +1, 0, -1 etc while with PDS member we can not ?
- 7 Answers
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Answer / karthik.ss
IN GENERATION DATA GROUP ,GDS (GENERATION DATA SET ) WIL BE
CREATED AUTOMATICALLY WITH PREFIX GXXXX.VXX. BUT IN CASE PDS
(PARTITION DATA SET) WE CAN'T CREATE. IN ORDER TO ACCEPT A
DS (DATA SET) WE HAVE TO USE ZERO FOR CURRENT DS AND -1 FOR
PREVIOUS ONE BUT IN CASE OF THE PDS WE CAN ACCESS ONLY
THROUGH THE NAME OF THE MEMBER.
| Is This Answer Correct ? | 14 Yes | 1 No |
Answer / aloke deb
PDS is similar to a folder in which files are kept. Their
organization format is PDS. GDG's have organizaton as PS
(similar to flat files) but the only addition is they
maintain versions of the previous data.
| Is This Answer Correct ? | 7 Yes | 1 No |
Answer / vinay sonar
The basic difference between PDS and GDG member is that GDG
members are peroidic in nature.If limit execids they get
automatically deleted or uncatloged based on condition.
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / polsani
In gdg generation are of ps data set type but in pds its a
member(jcl/cobol programs)
| Is This Answer Correct ? | 4 Yes | 2 No |
Answer / krishna
pds is the dataset that is partitioned.Gdg is like PDS but
all the versions has same name.
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / zos13
To understand the difference between PDS and GDG, you need to know the difference between PDS and PS.
PDS is like a folder of Windows with limitation it can not contain another folder(S), but Windows can do.
PDS may contain Programs, JCL's, Files(input/output) etc and they are called members.
If you wan to access a particular member, you need to give complete path like userid.xxxx.xxxx(memname).
PS is a single, independent file created by option 3.2 using Directory =0 or, PS or through JCL with DCB, SPACE, UNIT parameters etc.
Now coming to GDG's, they are similiar to PS with only difference if limit is 5 then there will be a kind of relation between all GDG's or their versions.
You can use (0), (-1), (-2), (+1) etc. based on creation or version or by giving the complete path(GDG name with GnnnnVnn).
| Is This Answer Correct ? | 1 Yes | 3 No |
Answer / dedicated_programmer
Thanks Karthik,
And could you help in sorting out whether there is any other
difference between a PDS member and a GDG generation EXCEPT
that we can reference the GDG Generations using +1, 0, -1
etc while with PDS members we can NOT ?
| Is This Answer Correct ? | 1 Yes | 4 No |
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