Since you won't be mixing past and future data, I would expect the new name to REPLACE any conflicting attributes, and use the existing space as the primary allocation. Secondary extents use JCL amount or saved amount if not present, similarly on the RLSE.
IDCAMS VSAM DEFINE already has reuse, so just borrowing the term. On Thu, Feb 23, 2012 at 3:29 PM, Frank Swarbrick <[email protected]> wrote: > I like it. > > John: What would your expectation be if the characteristics of the existing > dataset were different than those specified on the DD. SPACE and the like. > Would this new parm alter the characteristics as specified on the DD, or > would they say the same? > > Frank > >>________________________________ >> From: Mike Schwab <[email protected]> >>To: [email protected] >>Sent: Thursday, February 23, 2012 1:39 PM >>Subject: Re: Thought: new DISP "status" function >> >>DISP=REUSE or DISP=(REUSE,CATLG) in case of additional volumes. >> >>On Thu, Feb 23, 2012 at 2:28 PM, McKown, John >><[email protected]> wrote: >>> We all know that you can specify DISP=OLD|SHR|NEW|MOD for a dataset. I just >>> had another wacky thought of a new one that I would like. I can't really >>> think of a good, three character, value for it. But what it would do is >>> what UNIX does with a PATHOPTS=(OTRUNC,OCREAT). It would, like MOD, either >>> reuse an existing allocation, or create a new one. But, unlike MOD, it >>> would not add to the end, but put an EOF at the beginning of the dataset >>> and start writing over the old data. What do others think? >>> >>> John McKown >> >>-- >>Mike A Schwab, Springfield IL USA >>Where do Forest Rangers go to get away from it all? >> >>---------------------------------------------------------------------- >>For IBM-MAIN subscribe / signoff / archive access instructions, >>send email to [email protected] with the message: INFO IBM-MAIN >> >> >> > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
