Your linked articles are about immersion cooling, which is "liquid cooling," I suppose, but a very different thing. Do OVH actually use immersion cooling in production? This seems like a "labs" product that hasn't been fully baked yet.

OVH _do_ definitely use traditional water-loop/water-block liquid cooling like Google are presenting, described here: https://blog.ovhcloud.com/understanding-ovhclouds-data-centr... and visually in https://www.youtube.com/watch?v=RFzirpvTiOo , but while it looks very similar architecturally their setup seems almost comically inefficient compared to Google's according to their PUE disclosures.