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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.arch
Subject: Re: what's a mainframe, was is Vax addressing sane today
Date: Thu, 12 Sep 2024 04:33:09 -0000 (UTC)
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On Thu, 12 Sep 2024 02:05:14 -0000 (UTC), John Levine wrote:

> They don't just update the software, they swap out entire hardware
> subsystems while the overall system keeps running.

Xen Orchestra (open-source) can do that on commodity PC hardware.