> IMO, you could replace all your JCL with REXX code. You'd have a hard time with scheduling if you tried that.
> But then the programmer needs to be a REXX expert Why? Most users aren't JCL experts. Besides, in some ways REXX is simpler. > Hum, how do the Windows experts "restart" a "job" that fails? How does z/OS? There are stringent limitations on checkpoint restart. Step restart is less constrained but not always appropriate. -- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of John McKown [john.archie.mck...@gmail.com] Sent: Tuesday, December 22, 2020 6:23 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Build and submit proc On Tue, Dec 22, 2020 at 2:44 PM Wayne Bickerdike <wayn...@gmail.com> wrote: > Many moons ago, when I was a trainee programmer I asked my senior > programmer why IBM couldn't just get rid of JCL. He laughed. I was serious, > still am 45 years later. > > Why JCL even after all this time? Cost. Let's suppose IBM wanted to do this. First, they'd need to design a new way to do batch work. That means something like JCL2 or AJCL (Advanced JCL). Now, that needs to be converted into internal text. Hum? That means either an entirely new internal text, or more "types" (like adding new instructions to an ISA?). But then the initiator needs to be updated. And, if new functions, that means new things in the SWA (which I guess in an in-core version of internal text). All of this takes time and money. So, how much are you (or your company/employer) willing to pay for this? Perhaps it should be a Program Product? Oh, and last but not least. Will all Broadcom (nee CA) update CA-11 and CA-7 (perhaps others) to support this new facility? I know in many shops, if you took away CA-11, the production control staff would likely be unable to do restarts correctly. Unless, of course, AJCL included an automated way to restart a job. But that's even more cost. And would likely really upset Broadcom. IMO, you could replace all your JCL with REXX code. But then the programmer needs to be a REXX expert. And the restart logic must be coded in every REXX program, {shudder} Hum, how do the Windows experts "restart" a "job" that fails? I really don't now. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
