Slimming Servers
I finally paid down a technical debt in my home lab that has been driving me crazy. Once upon a time, I had two servers set up with Xen Server, and vm's within those two Xen instances providing services. Later, I learned Docker, and so I started running docker containers within the VMs.
Bad use of equipment.
Today I've eliminated the Xen layer, and run the services on the machine's host os, and that allowed me to power down one of the two servers.