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How to run your own mainframe Linux

• kephra 14y ago
  lol Running Linux/390 or z/Linux under Hercules just slows the thing down, without offering any mainframe benefits. Not even educational benefits, as you can not license z/VM, VM/ESA, z/OS or OS/390 to Hercules to run a Linux in the same environment as it would on a real iron.
  • derleth 14y ago
    > you can not license z/VM Isn't the whole point of z/VM that you can't tell it's there from the guest OS?
    • greenyoda 14y ago
      The main point of z/VM is that you can run multiple instances of different operating systems on the same physical hardware. (It's sort of amazing that IBM started developing this virtualization software in the mid-1960s.) And you can most certainly tell it's there, since there's an API to call z/VM services (which wouldn't exist on the bare hardware) from a virtual machine: https://en.wikipedia.org/wiki/VM_(operating_system)#Hypervisor_interface https://en.wikipedia.org/wiki/VM_(operating_system)#Hypervis...
  • TallGuyShort 14y ago
    It's actually very useful for developing, testing and debugging programs that need to be run on a mainframe without having to actually try it out directly on your production environment.
• ja27 14y ago
  I really wish IBM would open up some sort of emulation environment for educational use. Their customers desperately need new z/OS developers but it's hard to break into that space and learn it.