I know it&#x27;s not on a mainframe but if you think 8,000 vms is a lot (which it is!) Ron Minnich ran 1,000,000 Linux VMs on the Thunderbird supercomputing cluster with Dell supplied 4,480-nodes.<p><a href="https:&#x2F;&#x2F;share.sandia.gov&#x2F;news&#x2F;resources&#x2F;news_releases&#x2F;sandia-computer-scientists-successfully-boot-one-million-linux-kernels-as-virtual-machines&#x2F;" rel="nofollow">https:&#x2F;&#x2F;share.sandia.gov&#x2F;news&#x2F;resources&#x2F;news_releases&#x2F;sandia...</a>