For the better part of a year the primary server room of the company I work for smelled much like a sewer, courtesy of the broken pipe in the toilet next door. I surmise that the AC pulled in and circulated some rather rancid air resulting in an enclosed room where you would not wish to linger for too long; changing the filters had no apparent effect. Our secondary server room is so narrow that removing a full depth rack-mounted device would actually require us pushing the rack back so we had enough space to pull it out. So, I’m certainly no stranger to the quirks one might find in a data centre, which is possibly why I found this project interesting.

The driving purpose behind this project is to see if it’s possible to get a data centre environment down to or as close to, a PUE (Power Usage Efficiency) of 1.0. As explained in the article:
A PUE of 1.0 essentially means that all the power consumed in the data center generates compute operations and there is no additional cooling or power overhead.
Air-conditioners will in most data centres be the largest consumer of electricity aside from the actual servers themselves. In a traditional enclosed server room, AC is absolutely essential, as anyone who has turned them off will notice that the room tends to get rather steamy in a very short period of time. However, one thing I don’t quite understand is the tendency for people to set the AC to blizzard mode. The last time I checked servers were quite capable of, and indeed rated to be able to run at temperatures substantially higher than room temperature. Having your tongue frozen to the roof of your mouth and your snot forming icicles in your nose is not a great deal of fun. As a bit of advice you can stand behind server racks to thaw out a bit. Setting the temperature to something more normal will probably save you a whole lot of money.
So it seems that using the environment as far as possible to cool the servers goes a long way toward achieving this goal. Already there are some initiatives that should see this come to light in the future.
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