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From: arnold@emory.UUCP (Arnold D. Robbins {EUCC})
Newsgroups: comp.edu
Subject: Re: portable code
Message-ID: <1964@emory.UUCP>
Date: Mon, 8-Dec-86 14:44:09 EST
Article-I.D.: emory.1964
Posted: Mon Dec  8 14:44:09 1986
Date-Received: Wed, 10-Dec-86 03:27:56 EST
References: <2796@bu-cs.BU.EDU> <2440@ecsvax.UUCP>
Reply-To: arnold@emory.UUCP (Arnold D. Robbins {EUCC})
Organization: Math & Computer Science, Emory University, Atlanta
Lines: 52

In article <2440@ecsvax.UUCP> hes@ecsvax.UUCP (Henry Schaffer) writes:
>> [quotes by Barry Shein that MVS/XA not supported under VM deleted]
>
>  Some non-IBM literature I received recently (Which VM is Right for You,
>by VM Software, Inc. of Reston VA) lists a whole bunch of VM "variations"
>from VM/SP-Entry or VM/IS at the bottom end (simplest with limited
>capabilities - assuming we're not counting VM/PC) to VM/SF (originally
>VM/XA in its first release) which is "At the highest end of VM variations...".
>
>  This gives the capability of converting from, e.g. MVS/SP to MVS/XA
>and having both systems running all the time during the conversion.  This
>is an incredible benefit during the conversion time - for testing during
>business hours, parallel runs, etc.
>
>--henry schaffer  n c state univ

The way I understand it from talking the IBM-ers around here, is that
on an XA machine, VM/SF allows an XA guest, but that is about it; i.e.,
otherwise it is a very stupid VM, with only a rudimentary CMS.

We have been considering a 3090 class machine at the Computing Center,
and if we were to get one, the set up would eventually be:

	+---------+   +-----------------+
	| CICS... |   | CMS, IX/370 ... |
	+---------+   +-----------------+
	| MVS/XA  |   |	  VM/HPO        |
	+---------+---+-----------------+
	|	VM/SF		        |
	+-------------------------------+
	|	3090 Hardware	        |
	+-------------------------------+

Short term, it would probably be like this:

	+---------+   +--------+  +-------------+
	| CICS    |   | CICS   |  | VM stuff... |
	+---------+   +--------+  +-------------+
	| MVS/XA  |   | MVS/SP |  | VM/HPO 	|
	+---------+---+--------+----------------+
	|	VM/SF	       			|
	+---------------------------------------+
	|	3090 Hardware  			|
	+---------------------------------------+

This would be for testing and conversion, in particular between the
two MVS systems. Boy, I'm glad I'm not an IBM jock...
-- 
Arnold Robbins
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