To all contributors; Thanks.
I'll now be able to suggest that removing the SYST attribute from the PPT has no risks other than exposing the address space in which the program is running to timing - which risk can, of course be avoided with TIME=1440 (or NOLIMIT). The particular environment in which I wanted to make this suggestion is in support of dynamic VIPAs using the ARM function. When I was researching dynamic VIPAs I discovered that the ARM function complemented them very well. For use with programs not yet, as I believe those who know the jargon say, "ARMed" I put together a pair of programs wrapped round the ARM macros. However, in order to use them, I needed multiple job steps in the started task procedure and SYST might/did get in the way of that. It turned out I was to some extent wasting my time - although you understand a topic better for having to sculpt a program in order to support it - since there is, and was, a program with all the necessary options available from IBM called "ARMWRAP". The trouble was that ARMWRAP appeared to be some sort of unofficial offering[1] and it missed being found in usual documentation. [1] Of 20 "hits" on a www.ibm.com Search, 19 are redbooks and 1 a presentation on IMS (where "IMS Connect" not being "ARMed" is excused by the availability of ARMWRAP). The first "hit" is for a redpaper "z/OS Automatic Restart Manager" from February 2002 which appears to have been written in order to introduce ARMWRAP and provides instructions for obtaining an ARMWRAP.zip package. Incidentally, the redpaper doesn't say anything about SYST which is most remiss of the redpaper authors. Chris Mason ----- Original Message ----- From: "Jim Mulder" <[EMAIL PROTECTED]> Newsgroups: bit.listserv.ibm-main To: <[email protected]> Sent: Thursday, 02 March, 2006 5:48 PM Subject: Re: SYST > IBM Mainframe Discussion List <[email protected]> wrote on 03/02/2006 > 09:53:34 AM: > > > In <[EMAIL PROTECTED]>, on 03/01/2006 > > at 08:25 PM, Chris Mason <[EMAIL PROTECTED]> said: > > > > >I wonder if there is some aspect of the "system task" other that > > >being free of time constraints and requiring to be initiated by a > > >START command which at least prefers a single step. > > > > Long ago, in a release far away, the attributes in the PPT were only > > honored for single-step jobs. Back then there was no SMF timing for > > system tasks. I suspect that despite the name SYST has nothing to do > > with whether a started task is a system task, and only controls > > timing. > > I would agree, as I am unaware of any concept of a "system task" > in MVS, other than in the documentation for the PPT. Possibly that > the terminolgy originated in an ancestor of MVS. > > Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
