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

 
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svishnudas

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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)
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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....
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shreevamsi

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

PostPosted: Fri Aug 04, 2006 12:30 pm    Post subject: Re: Generation Data Group...
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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
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imain
Warnings : 1

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Joined: 25 Jun 2006
Posts: 14
Location: US

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

Can u tell me abt MVS Extended Architecture.
What bit it is.?
I thought MVS was 32 bit.
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shreevamsi

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

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