Tony, Based upon the note in the 1.10 migration, it would seem to indicate that using z/OS 2.2 EE to communicate with a z/OS 1.4 system would be inadvisable? Or just inadvisable without the ATCSTRxx HPRSESLM=DISABLED?
Rob Schramm On Thu, Mar 8, 2018 at 3:16 PM Cieri, Anthony <aci...@seic.com> wrote: > > I did some more digging and it appears that the HPRSESLM VTAM > start option that I referred to earlier was introduced in z/OS V1.10. We > are a service Bureau shop and I recall having some issues when we upgraded > from z/OS V1.9 to V1.11. Those scars are what lead to my first reply!!! I > also found an old discussion in the archives at: > > > https://groups.google.com/forum/#!topic/bit.listserv.ibm-main/6QggnT04hlw > > This discussion points to other document and tech notes for back > ground information. To avoid this particular issue, code HPRSESLM=DISABLED > in the ATCSTRxx member for the z/OS V2.2 VTAM. > > > HTH > Tony > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On > Behalf Of Rob Schramm > Sent: Thursday, March 08, 2018 10:37 AM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: VTAM communication z/OS 2.2 and z/OS 1.4 > > Tim, > > z/os 1.4 runs on a z13s mono-cpu with no accommodation other than having > all available maintenance applied. Multi-cpu's is a wait-state. > > I am most concerned with Tony's comments about EE over the years. The > chance of these ending up on separate CECs is very low. But I always like > to position for the unlikely. I want to conserve my efforts.. to establish > communication between the LPARs and pick the method that is most likely to > work coupled with having the best flexibility. But # 1 priority is that it > works. > > Rob Schramm > > > > On Thu, Mar 8, 2018 at 2:23 AM Timothy Sipples <sipp...@sg.ibm.com> wrote: > > > z/OS 1.4 and z/OS 2.2 are far enough apart that there was never a > > single IBM machine model that officially supported both releases. IBM > > supported running z/OS 1.4 up to the z9 models, and z/OS 2.2 starts > > with the z10 models. If you've got them both running on one CEC, it's > > lucky, and congratulations. Please make sure you're not running z/OS > > 1.4 in Bimodal Accommodation (ESA/390 31-bit mode), by the way, for at > > least two big reasons. > > > > With that background, I don't think you can or should assume a single > > CEC "forever," or even for very long. At least, it'd be prudent not to > > "wire in" such rigidity. If you're still nervous, you can set up both > > EE and CTCA connections. I recommend configuring EE (over a > > HiperSocket if on the same > > CEC) as primary/favored since the performance characteristics are > > likely to be better, but you can backstop EE with CTCA if you wish. > > > > EE officially debuted with OS/390 Version 2 Release 7 in early 1999, > > was backported to OS/390 Version 2 Release 6, and was circulating in > > earlier form before that. EE certainly wasn't fresh off the boat with > > z/OS 1.4, which reached End of Service in 2007, over 8 years after EE > > debuted. z/OS > > 1.4 is plenty new enough for these purposes. I recall plenty of EE > > adoption in z/OS 1.4 and prior. > > > > > > ---------------------------------------------------------------------- > > ---------------------------------- > > Timothy Sipples > > IT Architect Executive, Industry Solutions, IBM Z & LinuxONE, > > Multi-Geography > > E-Mail: sipp...@sg.ibm.com > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, send > > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > -- > > Rob Schramm > > ---------------------------------------------------------------------- > 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 > -- Rob Schramm ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
