Re: Recursive VM installation?
|
On Tue, Mar 11, 2025 at 10:50 Alexander Huemer via <aziD5eeth9fe= [email protected]> wrote: > You can install VM on top of VM
My knee-jerk question to my instructor back then was:
> How deep can you go?
He didn't know.
Technically, there is no limit.? Diagnose code x'0000' will attempt to return up to 5 levels of CP info.? Practically, the "top level" system gets slower and slower as you add more levels of CP underneath it.? It was common to run two levels for testing purposes, back in the 70s and 80s, but not for production, due to poor performance.? With today's real and emulated mainframes, you could easily do more than that in production.
Ever since, I have an idea in my head that comes back occasionally.
Can you install VM 'recursively'?
What I mean by that is the following:
...
Yes, but you'd have to write that installation process yourself.? Nothing in the normal VM installation makes that simple.
I am lacking the experience with VM to assess whether this is possible
at all or if perhaps it is possible in principle but only with later
versions of VM than VM/370 or something like that.
Successive later versions of VM have added more and more functions to improve automation capabilites.? Stuff like the Secondary Console Image Facility.
Ross
|
