On Thu, 27 Oct 2011 09:09:22 -0400, John Eells wrote: >Ted MacNEIL wrote: >>> I'm not an SMS guy, but I believe that any data set managed by SMS will get >>> created with implicit EOF. >> >> Unless things have changed, yes. > >Things have changed (smile). Now it's not only for SMS-managed data sets: > >In z/OS V1.11, DFSMSdfp processing is changed to indicate end-of-file >(EOF) during the allocation of data sets on DASD that are not
"indicate" strikes me as more notionally passive than what I had understood the operation to be. I had understood that it actually writes the EOF record. (Not, of course, for primary allocation 0 -- or is this why you used "indicate" rather than "write"?) >SMS-managed and have either sequential or an undefined data set >organization. This makes this processing for both SMS-managed and > Hooray for "undefined". It rebuts the argument made by those of limited understanding that so writing an EOF might damage PDS, BDAM, or VSAM data sets. In fact the EOF can be written regardless of DSORG, provided only that the operations were performed in the correct sequence. Omitting the EOF for known non-sequential DSORG seems to be merely a performance consideration. -- gil ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
