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PavithraC
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Joined: 26 Nov 2010
Posts: 1
Location: Chennai
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What are the Default DISP Parameters ? In what all ways can a default DISP parameter be coded ?
e.g. Want to know if DISP=(NEW,,)
DISP=(,CATLG,DELETE)
DISP=(,KEEP,)
DISP=(,,DELETE) are Valid..
In that case what will be assumed instead of commas in each case?? |
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expat
Global Moderator
Joined: 14 Mar 2007
Posts: 8796
Location: Welsh Wales
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There is a button marked "IBM Manuals" at the top of every page.
Find the JCL manuals and have a good read.
If you want to know what is valid and what is not, I suggest that you try them for yourself and observe the results and post if you have problems. |
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nandeshwar
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Joined: 11 Oct 2010
Posts: 45
Location: Delhi
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| PavithraC wrote: |
What are the Default DISP Parameters ? In what all ways can a default DISP parameter be coded ?
e.g. Want to know if DISP=(NEW,,)
DISP=(,CATLG,DELETE)
DISP=(,KEEP,)
DISP=(,,DELETE) are Valid..
In that case what will be assumed instead of commas in each case?? |
hi default parameters are listed below:
DISP=(NEW,,) is INVALID
DISP=(,CATLG,DELETE) equals to DISP=(NEW,CATLG,DELETE)
DISP=(,KEEP,) equals to DISP=(NEW,KEEP,KEEP)
DISP=(,,DELETE) equals to DISP=(NEW,CATLG,DELETE)
LET ME KNOW IF I AM WRONG. |
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nandeshwar
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Joined: 11 Oct 2010
Posts: 45
Location: Delhi
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| Quote: |
| There is a button marked "IBM Manuals" at the top of every page |
thanks expat for letting us know these manuals. |
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Arun Raj
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Joined: 17 Oct 2006
Posts: 2481
Location: @my desk
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| LET ME KNOW IF I AM WRONG |
Dont use CAPS. You got the first one wrong. |
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enrico-sorichetti
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Joined: 14 Mar 2007
Posts: 10886
Location: italy
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for the mother of all the links to IBM manuals see...
www-03.ibm.com/systems/z/os/zos/bkserv/index.html
and from there You can bookmark all the needed manuals
I have a special manual bookmark folder in my browser, pointing to
the ISPF Bookshelf
the TSO/e Bookshelf
the Assembler and bookshelf
Messages and codes
abend codes
JCL refernce and guide
principles of operation
a few more |
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parsesource
New User
Joined: 06 Feb 2006
Posts: 97
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| Arun Raj wrote: |
| Quote: |
| LET ME KNOW IF I AM WRONG |
Dont use CAPS. You got the first one wrong. |
another error is
DISP=(,,DELETE) equals to DISP=(NEW,CATLG,DELETE)
its NEW,DELETE,DELETE |
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Phrzby Phil
Senior Member
Joined: 31 Oct 2006
Posts: 1049
Location: Richmond, Virginia
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I strongly recommend not using default values for at least the first two DISP parms.
Oftentimes one needs to scan JCL looking for where NEW files are allocated, and it is nice to look for "DISP=(NEW" and not also have to remember to look for "DISP=(,".
Standards Standards Standards. |
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parsesource
New User
Joined: 06 Feb 2006
Posts: 97
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| Phrzby Phil wrote: |
I strongly recommend not using default values for at least the first two DISP parms.
Oftentimes one needs to scan JCL looking for where NEW files are allocated, and it is nice to look for "DISP=(NEW" and not also have to remember to look for "DISP=(,".
Standards Standards Standards. |
it´s much more complex. No DISP= statement or 'DISP=' without any parameters also defaults to NEW,DELETE,DELETE
also DISP=NEW is possible without brackets
i´ve written a jcl-parser (edit macro). it creates a list of all "not found" datasets, which first-disp-statement is not NEW or MOD. it handles every possible DISP syntax with a few exceptions. |
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Phrzby Phil
Senior Member
Joined: 31 Oct 2006
Posts: 1049
Location: Richmond, Virginia
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Nice programming to do that, but to repeat: better yet installation enforces standards.
Everyone won't know these nuances. |
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Pete Wilson
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Joined: 31 Dec 2009
Posts: 590
Location: London
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Consider the effects of CA11 if applicable as well. It can be used to delete files at the start of a job and these files are then just created as new files in the JCL.
Also for SMS managed GDS's, if the job abends and a GDS is left in DEFERRED status it will be reused when the job is restarted even though it has (+1) in the JCL. |
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Anuj Dhawan
Superior Member
Joined: 22 Apr 2006
Posts: 6248
Location: Mumbai, India
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| Pete Wilson wrote: |
Consider the effects of CA11 if applicable as well. It can be used to delete files at the start of a job and these files are then just created as new files in the JCL.
Also for SMS managed GDS's, if the job abends and a GDS is left in DEFERRED status it will be reused when the job is restarted even though it has (+1) in the JCL. |
Yes, I agree when CA11 in-effect, PS and GDS are just differnt animals for "CA11 restart"... - learned it hard way, but why is it so - I'm still searching for the answers. |
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