I've kind of muddled around this issue for years. I thought I would ask here and get some more real answers. I know what I am asking about seems to work but I don't know if it is technically correct.
Given a long-running program executing out of a PDS named MYLIBE: //STEP1 EXEC PGM=PROGA //STEPLIB DD DSN=MYLIBE,DISP=SHR Let's assume the program does not dynamically load any components from MYLIBE on an ongoing basis (and is not an overlay structure -- those don't exist anymore, right?). 1. Is it safe to copy or link/bind another program into the same PDS specifying DISP=SHR? //SYSLMOD DD DSN=MYLIBE(PROGB),DISP=SHR 2. Is it safe to copy or link/bind PROGA into the same PDS? //SYSLMOD DD DSN=MYLIBE(PROGA),DISP=SHR 3. Is it safe to compress the PDS? Do the answers to 1 and 2 change if MYLIBE is a PDSE instead of a PDS (and I am assuming PDSE working as designed; I'm not asking about PDSE "bugs"). Does it matter whether PROGA is refreshable? Refreshment happens from page backing, not the load library, right? I can't see why the answer to 1, 2 and 3 should not be Yes. PROGA's bits are already in memory and changing or moving them on disk should not matter. But I am asking the wiser heads here. Thanks, Charles ---------------------------------------------------------------------- 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
