Just to complement: RACF, TSS and ACF2 were not the only choice.
Here, in Poland many installation had been using polish security product
called PIES (eng. DOG).
Now, AFAIK there is (still) one small TSS shop, all the rest use RACF.
Few years ago I saw some announcement of DEADBOLT, product of
JMenterprises company (US). AFAIK neither product, nor the company is on
the market now.
I've also heard of some system modification allowing to used z/OS
without any security product. Of course in such case everyone has access
to everything.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 2015-09-10 o 07:11, Timothy Sipples pisze:
Tony Harminc wrote:
Only IBM is in a position to truly know the market share, because only
they know exactly how many z/OS systems are out there.
Not truly, not exactly. IBM's omnipotence is routinely overestimated. ;)
IBM presumably knows how many z/OS licensees(*) are licensing the z/OS
Security Server elements. Presumably most(**) z/OS customers that do not
license z/OS Security Server are licensing some other security provider
product(s), though IBM would not know those details. Also, IBM would not
know which z/OS Security Server licensees also license other security
provider products.(***)
Anyway, I assume IBM could make some "reasonable" estimates, as other
parties could, but I'd say IBM doesn't truly know these market shares.
For what it's worth, Barry Schrager's estimates seem plausible to me, too,
but I have no special insight.
Writing my own views for myself, as always, even if I do not always insert
a disclaimer.
(*) z/OS licensees is not quite the same thing as z/OS systems (or
enterprises with z/OS). Every discrepancy I can think of is illegal,
though.
(**) I suppose it's also possible (though I'm sure rare) to run z/OS
without one of the three most popular security provider products. That's an
interesting side question. I have not yet encountered even one z/OS LPAR
(or z/VM guest) running without one of the three most popular security
provider products. Has anyone else? If so, how was that z/OS instance
configured?
(***) As one simple example, customers that license the IBM Rational
Development and Test Environment for z (RDTz) have z/OS Security Server
licenses (within those particular license terms and conditions) at no
additional charge. Do those RDTz licensees actually use the z/OS Security
Server, or do they use another security provider product? IBM would have no
reliable way of knowing.
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