Well, maybe it's being developed? Maybe we should simply wait for next
generation? I'm serious.
BTW: there is something which I really consider stupid: ESCON. EC12
still supports old format of I/O cards. Both I/O Drawer and I/O Cage are
supported (with some *non-technical* limitations), one can use old type
of OSA, Crypto, FICON - in every case there are new shape replacements.
It also supports ISC-3, which is a little bit ridiculous because every
CPC generation which is supported by sysplex (can work in sysplex with
EC12) is able to use much more efficient Infiniband.
From the other hand, ESCON has no replacement, except quite expensive
Prizm. Why? No development was needed here.
--
Radoslaw Skorupka
Lodz, Poland
W dniu 2012-09-05 19:45, McKown, John pisze:
OK, I'm reading the Redbooks on this. And I'm wondering something due
to my hardware ignorance. I've noticed that doing a P.O.R. is rather
time consuming, especially on my company's z9BC. I don't know what a
P.O.R. actually does internally. One thing that I am fairly sure of
is that it loads the IOCDS and perhaps the "millicode" from the SE.
It needs to do this because HSA is essentially just a part of main
memory. It has always seemed to me that the SE's are rather slow. But
I don't know how long this loading takes. The zEC12, optionally, has
SSD type memory available to it. If available, why not keep the HSA
in it? Is the HSA written to any time other than P.O.R. or when the
IOCDS is reloaded due to a dynamic IOCDS update? Would doing so have
any effect on the P.O.R. time? Or am I once again trying to optimize
something that is irrelevant?
I ask these things due to my curiosity and ignorance. The last time,
about IPL'ing from SSD memory, gained me good information about how
fast IPL/NIP actually was compared to the rest of z/OS
initialization. Too bad there is not some way to have an more
completely "initialized" z/OS in the Flash Express (like CMS is kept
in an NSS in z/VM) and be able to IPL from it. Yes, I know. We IPL
way too often. Not my call.
--
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