Being somewhat interested in validating whether VIO still serves a purpose in these modern times with super quick DASD, i just ran some mickey mouse comparisons, doing 10k allocates/frees of temporary datasets on VIO vs DASD.
Results tend to imply that the old adage of "the best I/O is no I/O", still appears to hold true. DASD: Elapsed: 3 minutes CPU: 27 seconds VIO: Elapsed 12 seconds CPU: 10 seconds Of course, this doesnt really help with the OP's issue of "permanent" temporary datasets. I believe that only "proper" temporary datasets are eligible for VIO, unless something changed in some recent z/OS release that i missed... ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
