On Feb 22, 2016, at 2:05 PM, R.S. wrote:
W dniu 2016-02-18 o 10:30, Timothy Sipples pisze:
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memory than the biggest available mainframe did
until 2015.
Well, it was a *shame* for mainframe. Both: memory limit and the
price of memory.
At the time you mention PC server vendors (including IBM system x)
offered configurations up to 12TB of memory (non-RAIM protected). 4
times more!. I haven't checked current p/Series aka System p
limits, but it was always higher than for mainframe, at least from
the times of z990.
So, during the years mainframe was the platform with the *lowest*
memory limit ...and it stiil is, even z13 (without "s"). And I do
not have to update information about PC servers, because those
outdated machines had more than mainframe today.
Price is also a problem - price of GB was always the higher among
the plaftorms (some exceptions could be possible). Not to mention
it can be purchased from different vendors.
So, if your workload need big memory choose... yes, I have big
problem to justify such workload on mainframe.
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Remember the *OLD* days there was a 16MB max on (even) an MP? Never
mind the cost of $10K per meg (if memory serves me on a 168).
Yes the newer machines have more memory but in reality you really
don't get all that more functionality, and yes there are bells and
whistles for the z genation.
There are still so many limitations on Z/os that one wonders why?
Ed
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