On Wed, Jun 17, 2020 at 10:43 AM Paul Gilmartin < 0000000433f07816-dmarc-requ...@listserv.ua.edu> wrote:
> On Wed, 17 Jun 2020 09:24:58 -0500, Kirk Wolf wrote: > > > >I wasn't thinking of using the "all members" form of cp ... > >I'm curious - how much time did you save by preallocating the PDS? > > > I'm mystified that it made a difference since Lionel never used the > allocate > "dd" in the call to "cp". Only SVC 99 knows. > > If you have a reusable allocation, then the cost is less than a new allocation. open/close for each member would still be expensive for a PDS with tons of members. A BLDL,loop: POINT,READ* is what you really want IMO. > >I would think that you might actually want ISPF-style enqueues. > > > I thought later of OGETX/OPUTX, which piggybacks on ISPF. > > Good point - that would definitely be something to try. Another fun thing to try is IEBUPDTE - I once played around with a REXX wrapper and then piped the control and data into it via DD:SYSIN pointing to /dev/fd0 from a shell script. It's *really* fast as expected, but has issues wrt the record format and content of the data that could mess it up. BTW: If it was as fast as it should be, Lionel probably doesn't need a "progress" popup :-) -- Kirk ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
