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.
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.
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:
Comments
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.
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.
> 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?
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)#Hypervis...