Running Two Pi Holes in Tandem
When walking and listening to the 2.5 Admins I heard about the concept of going from treating servers as pets to treating them as cattle. They discussed the habit of giving servers functional names, rather than emotional ones. The examples were similar to DR-1 for for Disaster Recovery one, prod 1 for production one and related names.
Servers as Cattle, Not Pets They spoke about the legacy habit of building a server up over a period of years to the modern habit of spinning up instances and containers that can easily be replicated within minutes, independent of hardware.