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 <[email protected]> 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: [email protected] > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- Rob Schramm ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
