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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Slooooow?
by Kebabbert on Fri 13th Mar 2009 11:50 UTC
Kebabbert
Member since:
2007-07-27

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

How many CPUs does a Mainframe have? It is good for I/O, update with a small calculation on lots of posts. But a Mainframe sucks badly at number crunching.

If a Mainframe has 16 CPUs, you could almost say that it corresponds to a PC server with 4 quad core CPUs = 16 cores. Each windows will run on a mainframe CPU. Windows by itself needs 2-3GHz and 2GB RAM. Therefore I wonder how many virtual windows it will run? 16-20? If you try to run number crunching on virtual Windows, a mainframe will not be successful?

And a Mainframe costs 10 million USD and above? Isnt it quite expensive to run 20 Windows machines?

Imagine running Crysis on a Mainframe. It will fail badly?

Reply Score: 1

RE: Slooooow?
by phoenix on Fri 13th Mar 2009 16:39 in reply to "Slooooow?"
phoenix Member since:
2005-07-11

Windows by itself needs 2-3GHz and 2GB RAM.


Windows XP by itself can run on a 450 MHz CPU with only 256 MB of RAM, and can run multiple applications, including MS Office XP, with as little as 768 MB of RAM.

Windows Vista requires more CPU and RAM, but not to the extremes that you listed, especially for normal business office work.

Reply Parent Score: 5

RE[2]: Slooooow?
by Kebabbert on Sat 14th Mar 2009 13:40 in reply to "RE: Slooooow?"
Kebabbert Member since:
2007-07-27

Are you trying to say that a mainframe will run great a many Windows instances without problems? I am just curious, and want to know more about this.


But if a 1000MIPS Mainframe CPU == 4GHz x86 CPU according to
http://www.mail-archive.com/linux-390@vm.marist.edu/msg18587.html
and a Mainframe has 16 CPUs, how many windows instances can you run on a mainframe, you guess? I mean of course, simultaneously using MS Office, Powerpoint, Visual Studio, etc. I am not interested in how many Windows instances a Mainframe can boot.

Reply Parent Score: 2

RE: Slooooow?
by Mike Pavone on Tue 17th Mar 2009 13:44 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.

Reply Parent Score: 1