On Mon, Aug 04, 2025 at 04:41:33PM +0000, Seymour J Metz wrote: > I always considered VIO a hack. what I really wanted was for IBM to > steal ideas from TSS and MULTICS.
Not knowing TSS or MULTICS but starting with MVT without HASP I considered HASP and JES2 spool a hack. Well, catalog, DASDM, jobq, were all too slow and did too much I/O so I see why it was created. But now we still have JES2 but also faster catalogs, index VTOCs, and vastly more storage so it's hardly needed. SYSOUT datasets were real datasets and could be put on specific volumes if extra space was needed (2314s!). Later with MVS, VIO was really useful. I used to run IEHMOVE with some small modifications which allowed using VIO for it's work files resulting in a large speedup. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
