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Output files with DUMMY,DISP=SHR and BLKSIZE

 
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krishna_ragav

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Joined: 29 Oct 2010
Posts: 10
Location: Chennai

PostPosted: Thu Aug 18, 2011 11:11 am    Post subject: Output files with DUMMY,DISP=SHR and BLKSIZE
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Dear All,

I do see the output file defined with dummy followed DISP=SHR,DCB parameters. Is there any use DUMMY with parameters DISP and DCB?

Can you please tell me what will happen if we don't use those parameters.

Code:
//OUTPUT1   DD DUMMY,DISP=SHR,                                   
             DCB=(RECFM=VB,LRECL=2004,BLKSIZE=2008)
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Bill Woodger

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Joined: 09 Mar 2011
Posts: 7251

PostPosted: Thu Aug 18, 2011 11:18 am    Post subject: Reply to: Output files with DUMMY,DISP=SHR and BLKSIZE
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Have you tried the JCL manual?

Doesn't hurt to try, does it?

Often you'll see stuff lying around after overriding a DD to DUMMY.

Someone once joked that with huge blocksize/buffers the data would get igrnored quicker. Try it. Maybe it wasn't a joke...
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dbzTHEdinosauer

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Joined: 20 Oct 2006
Posts: 6966
Location: porcelain throne

PostPosted: Thu Aug 18, 2011 11:25 am    Post subject:
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Quote:
Can you please tell me what will happen if we don't use those parameters.


it is so easy to test, why don't you try?

at my site, the set-up is such, that any dummy, requires some dcb parms.
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Soumik Das

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Joined: 06 Aug 2011
Posts: 25
Location: India

PostPosted: Tue Aug 23, 2011 7:40 pm    Post subject: Reply to: Output files with DUMMY,DISP=SHR and BLKSIZE
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see this....
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Marso

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Joined: 13 Mar 2006
Posts: 1224
Location: Israel

PostPosted: Tue Aug 23, 2011 8:10 pm    Post subject:
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krishna_ragav wrote:
Can you please tell me what will happen if we don't use those parameters.

Try this: in any JCL of yours, replace the
Code:
//xxxxx DD SYSOUT=x
by
Code:
//xxxxx DD DUMMY
Submit, and then you tell us what happens!
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