Portal | Manuals | References | Downloads | Info | Programs | JCLs | Master the Mainframes
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Usergroups Profile Log in to check your private messages Log in
 

 

Creating Generation Data Group with a variable as GDG(+N)

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM
View previous topic :: :: View next topic  
Author Message
svishnudas

New User


Joined: 02 Aug 2006
Posts: 4

PostPosted: Fri Aug 04, 2006 12:09 pm    Post subject: Creating Generation Data Group with a variable as GDG(+N)
Reply with quote

Hi all...

While creating a GDG in the following way ESCUB11.VDS.GDG1(+N), it is possible for N to have values in the range 1 to 255....

That is (+1) to (+255)...

Can anyone please tell the reason for this....
Back to top
View user's profile Send private message

shreevamsi

Active User


Joined: 23 Feb 2006
Posts: 305
Location: Hyderabad,India

PostPosted: Fri Aug 04, 2006 12:30 pm    Post subject: Re: Generation Data Group...
Reply with quote

hi,

MVS is a 8 bit operator.

So the Max value can be 2 power of 8. That is 256.

Since the GDG is refered from zero, a maximum of 255 can be created.

Clear??

~Vamsi
Back to top
View user's profile Send private message
imain
Warnings : 1

New User


Joined: 25 Jun 2006
Posts: 14
Location: US

PostPosted: Fri Aug 04, 2006 12:56 pm    Post subject: hi what about MVS XA
Reply with quote

hi Vamsi,

Can u tell me abt MVS Extended Architecture.
What bit it is.?
I thought MVS was 32 bit.
Back to top
View user's profile Send private message
shreevamsi

Active User


Joined: 23 Feb 2006
Posts: 305
Location: Hyderabad,India

PostPosted: Fri Aug 04, 2006 1:48 pm    Post subject: Re: Generation Data Group...
Reply with quote

Yes Imain,

MVS is 24 or 31 bit OS, and of that only 8 bits are allocated for what are required.

After that there is truncation of the bits...(exceeds the 8 bits allocated)

2 power 8 = 256.
MVS counts from 0 to 255 total of 256.
So at Max MVS allows at most 255 no of EXEC, Buffers, GDG versions,Procs etc.........

Hope i cleared what you wan.

~Vamsi
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> JCL & VSAM All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts copying data without knowing location arunsoods DFSORT/ICETOOL 6 Thu Jul 20, 2017 1:03 pm
This topic is locked: you cannot edit posts or make replies. Fetching data from BAI File arunsoods JCL & VSAM 1 Wed Jul 19, 2017 4:28 pm
No new posts Loading data to table gives wrong for... Raghu navaikulam DB2 19 Thu Jul 13, 2017 2:11 pm
No new posts SQL - select data available in index Nileshkul DB2 3 Mon Jun 26, 2017 1:30 am
No new posts NDM syntax checking without actually ... GAPX1 All Other Mainframe Topics 0 Wed Jun 07, 2017 2:36 am


Facebook
Back to Top
 
Mainframe Wiki | Forum Rules | Bookmarks | Subscriptions | FAQ | Tutorials | Contact Us