I'm sure this has been around before but I couldn't find anything useful searching the archives. I know that determining the size of and/or requested size information for a conventional non-necessarily-extended-format MVS dataset is an imperfect science. What is the best option (other than reading it start to finish!)? What are the alternatives? - Using OBTAIN/CAMLST to read the DSCBs. This gives both SPACE= information and actual extent sizes. Any comments? - I assume that RDJFCB for a not-yet-opened dataset will give SPACE= information only as coded in the DD statement (or SVC 99) which would be atypical and/or misleading for input datasets. Is that correct? The OPEN processing documentation describes DFSMS as merging the data from the DSCBs into the JFCB. How is that information available to an application program? In some way during an OPEN exit? By using RDJFCB after the dataset has been opened? Or ...? Thanks,
Charles Mills ---------------------------------------------------------------------- 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
