See below.
Peter Greening wrote:
Had initially mentioned "only reference i've found so far is that z/OS 1.4
can coexist with z/OS 1.5, thru 1.7, but nothing about parallel sysplex".
In hindsight that was obviously poorly proof-read.
Coexistence includes parallel sysplex coexistence.
i had been unable to find anything stating that zOS 1.4 can co-exist in a
parallel sysplex with 1.5-1.7 when zOS1.4 is no longer supported.
My question should simply have been "does it make any difference to this
level of co-existence if z/OS 1.4 is out of support?"
Look, this is pretty simple. z/OS R4 will coexist with z/OS R7.
But once z/OS R4 is withdrawn from service, two things will
happen. First, we will stop fixing any new coexistence issues
that happen to arise on z/OS R4. Second, we won't support
problems in your mixed sysplex if the problem is caused by the
unsupported z/OS R4 system. (Yes, you can get extended support
contracts, but I'm assuming you don't want to.)
i infer from Don's response that it does make a difference, in that if zOS
1.4 is unsupported as of 31/03/2007 then it is not allowed to co-exist with
other environments in the sysplex that are at 1.5 thru 1.7 (let alone 1.8)
So far as I know, we won't change the code just to prevent it,
but if it doesn't work for some reason you're on your own once R4
is unsupported. That's part of what "unsupported" means. But
note that we might change the code in a way that prevents it for
some other reason than merely preventing it. For example,
suppose we find a problem on a higher release that requires a
change to all the systems in the sysplex, and take an APAR that's
fixed on all supported releases. If you can live without that
fix, you're in luck. If you cannot, there won't be an R4 fix,
which could be, um, "inconvenient."
Of itself, we are not concerned about running on an unsupported level of OS
for 6-9 months. We are concerned about having to either
(1) conform, upgrade to z/architecture, and potentially move to a Group 80
license on a z890 from our current Amdahl Group 70 license, or
(2) suffer expulsion from the sysplex by no longer being part of PSLC
pricing.
Our desire is to stay in the sysplex on an unsupported version of zOS,
continue to benefit from PSLC, and then exit in Dec-2007.
Sounds as though our preferred approach is something up with which others
will not put.
Sorry, I've no clue about the pricing implications.
<snip>
--
John Eells
z/OS Technical Marketing
IBM Poughkeepsie
[EMAIL PROTECTED]
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