It is interesting to see that they apparently built this as a traditional raised floor environment without hot/cold aisle separation. Looks like something from 20 years ago. Building datacenters on the multi megawatt scale (example: 10-12kW thermal per 44U cabinet, equivalent to two 208V 30A circuits per cab), it's far more efficient to put everything straight on concrete slab, build hot and cold aisle separation and do fiber and power trays entirely overhead.

If I had to guess the PM on this was somebody who'd built traditional supercomputer datacenter environments 15-20 years ago for some entries in the top 50 of the top500 list, and scaled up what they knew how to build.

edit: Looking at the photos in more detail it looks like they're retrofitted hot/cold separation into a traditional 20-year-ago style raised floor environment. The fact that there's zero overhead ladder racks carrying AC power (or -48VDC cabling) and zero overhead fiber trays means that everything is under the floor... Very costly and labor intensive compared to modern methods of building a datacenter. Also means that it's not designed to be changed or modified very often, if ever, and it's a huge forklift upgrade if the power and fiber layer 1 topology ever needs to change.

https://home.cern/sites/home.web.cern.ch/files/image/about_s...