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.

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.

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.

Answer / polsani

In gdg generation are of ps data set type but in pds its a
member(jcl/cobol programs)

Answer / krishna

pds is the dataset that is partitioned.Gdg is like PDS but
all the versions has same name.

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).

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 ?

How to point my proc to production dataset always though i keep jcllib order=development.dataset? Is it possible?

3 Answers  

Could anyone please suggest me what is the maximum length of data that can be pass as input in //sysin dd * This was asked in interview. TIA

3 Answers   VC, Wipro,

In DCB, what is LRECL,BLKSIZE,DSORG

1 Answers   TCS,

whats the difference between empty and noempty of GDG?

4 Answers   Patni,

What is the max blocksize for a Tape file?

2 Answers  

if we give TIME=0 how many sec that job/step

14 Answers  

can we bowse or edit the GDG dataset if it is a tape entry?

4 Answers  

What is DSNDB06 ?

1 Answers  

can we give instream data in procedure

6 Answers   EDS,

how many max steps can we use in a job? pls answer to my question

3 Answers   TCS,

what happens if job falls in loop ? how to resolve it ?

3 Answers   Patni,

I have 5 steps in my job. say s1, s2, s3, s4, s5 //s1 exec ............. //s2 exec ............ //s3 exec .......... //s4 exec ........ //s5 exec ............... my question is i want to exeute only s2 and s4 steps... please advice me how to do this:

4 Answers   ITC Infotech, TCS,