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What is the significance of SYS1.DUMMY in GDG creation JCL

 
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shashankmodi
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Joined: 27 Sep 2006
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PostPosted: Wed Sep 27, 2006 2:56 pm    Post subject: What is the significance of SYS1.DUMMY in GDG creation JCL
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What is the significance of SYS1.DUMMY in the following example, while creating the new GDG ?



//GENJOB JOB (acct'ng information....
//STEP1 EXEC PGM=MYPGM
//STEPLIB DD DSN=MY.PGMLIB,DISP=SHR
//NEWGEN DD DSN=COMPANY.EMPLOYEE(+1),
// DISP=(NEW,CATLG),
// SPACE=(TRK,(5,5)),DCB=(SYS1.DUMMY,RECFM=FB,LRECL=80)
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UmeySan

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PostPosted: Wed Sep 27, 2006 3:14 pm    Post subject:
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Hi !

In your example SYS1.DUMMY is a modell-dcb.
You're using the file attributes, dcb-parameters, of this modell.
Recfm and Lrecl then are overwritten with your declarations.

Regards, UmeySan
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superk

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PostPosted: Wed Sep 27, 2006 3:18 pm    Post subject: Re: GDG
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It indicates to me that your datasets are not SMS-managed.
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UmeySan

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PostPosted: Wed Sep 27, 2006 3:34 pm    Post subject:
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Hi Superk !

Could you please be so kind to explain in detail.
So i can enlarge my konwledge.

Thanks & Regards, UmeySan
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shashankmodi
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PostPosted: Wed Sep 27, 2006 3:35 pm    Post subject:
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UmeySan wrote:
Hi !

In your example SYS1.DUMMY is a modell-dcb.
You're using the file attributes, dcb-parameters, of this modell.
Recfm and Lrecl then are overwritten with your declarations.

Regards, UmeySan


Thanks for answering.
Two more thing i have to now that why we used it and what if we dont use it ?
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Kevin

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PostPosted: Wed Sep 27, 2006 6:08 pm    Post subject: Re: GDG
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You might want to refer to this topic in the z/OS V1R7.0 DFSMS Using Data Sets manual. Note the restriction.
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