Gerhard:We had this issue often (often = 2-3 times a year) and it would never cease to amaze me that the production support group could never figure out what the cause was. I seemed to have been on permenant call support from the group. I would listen to the person and ask a few questions and invariable the "empty" dataset was often the issue. There were several related issues on file retention and DR that kept bumping into the problem. I would invariably tell them to do A and B and if it still didn't work call me back and went back to sleep. We were getting into SMS conversion talking and that problem would have been solved by that (there is a parmlib member that writes an EOF into every dataset but I left before they started, thank god. I have heard they are still battling it last I heard.The managers in the production support areas had a illogical mind and could screw up anything given to him. Ed
--- On Sun, 10/17/10, Gerhard Postpischil <gerh...@valley.net> wrote: From: Gerhard Postpischil <gerh...@valley.net> Subject: Re: Null versus empty datasets To: IBM-MAIN@bama.ua.edu Date: Sunday, October 17, 2010, 1:04 PM On 10/17/2010 11:00 AM, Paul Gilmartin wrote: > That said, I welcome the change to allocation; I even feel it > didn't go far enough. Simply, allocation should write an end > of file at the beginning of every new data set, SMS or non-SMS, > and regardless of DSORG, known or unknown. The overhead would > be minor compared to the uncertainty removed. Back in the seventies we had a lot more failures, and I wrote a little utility that would initialize a data set by writing an EOF on every allocated track (pre-VIO). This not only prevented the old data reuse problem, but also allowed normal access methods to recover data up to the point of a crash. And one of our customers used it to clear data sets before freeing them. Considering all the problems we had back then, waiting for a vendor to fix things was not always a viable option. Gerhard Postpischil Bradford, VT ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
