Linked by Thom Holwerda on Thu 12th Mar 2009 16:27 UTC, submitted by jmarka
Hardware, Embedded Systems "Software that for the first time lets users run native copies of the Windows operating systems on a mainframe will be introduced Friday by data center automation vendor Mantissa. The company's z/VOS software is a CMS application that runs on IBM's z/VM and creates a foundation for Intel-based operating systems. Users only need a desktop appliance running Microsoft's Remote Desktop Connection client, which is the same technology used to attach to Windows running on Terminal Server or Citrix-based servers. Users will be able to connect to their virtual and fully functional Windows environments without any knowledge that the operating system and the applications are executing on the mainframe and not the desktop."
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RE: Slooooow?
by Mike Pavone on Tue 17th Mar 2009 13:44 UTC in reply to "Slooooow?"
Mike Pavone
Member since:
2006-06-26

It is well known that a typical 1000 MIPS IBM Mainframe CPU corresponds to 4000GHz x86 CPU in terms of performance. 1 MIPS == 4MHz.

Complete garbage. First off, MIPS stands for Millions of Instructions Per Second. A modern x86 CPU can execute multiple instructions per clock cycle so your math makes no sense whatsoever.

Second, there are no readily available benchmarks comparing modern IBM mainframes and modern x86 CPUs. The most you'll get out of IBM is a comparison between the z10 and the z9.

The only places I might expect to see a huge difference in performance clock for clock are floating point decimal math and encryption. z10 mainframes have this implemented in specialized hardware.

This is not to say that mainframes don't have a performance advantage over x86 CPUs clock for clock, just that outside of a few narrow areas, the difference is unlikely to be anywhere near what you suggest.

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