John McKown wrote:
As far as I can see, in today's z/OS environment, everything could be
architected as
a type 1, 3, or 6 SVC with no real impact on functionality. If I'm
blowing smoke, please
educate me on the advantages of a type 2 (other than no paging, I guess)
or a type 4.
and it would be possible to go further. PC-based schemes could replace all
SVCs; and they could do so to advantage, but not to great enough advantage
to justify the use of the resources that would be required to accomplish
such a conversion. (The use of an SVC ab initio in a new facility would
indeed raise questions about the technical judgment of its designer, but to
say this is not to say that there is any rationale for getting rid of most
of those we have.)
What was important about SVC 109 was its use a router in the fashion that is
very well described in Bob Wright's post.
John Gilmore
Ashland, MA 01721-1817
USA
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