Comment by ChuckMcM

From the post: "...but also despite multi-million dollar annual spend, we get about as much support from them as you would spending $100." -- Ouch! That is a pretty huge problem for Google.

I really enjoyed this post, mostly because we had similar adventures when setting up the infrastructure for Blekko. For Blekko, a company that had a lot of "east west" network traffic (that is traffic that goes between racks vs to/from the Internet at large) having physically colocated services without competing with other servers for bandwidth was both essential and much more cost effective than paying for this special case at SoftLayer (IBM's captive cloud).

There are some really cool companies that will build an enclosure for your cold isle, basically it ensures all the air coming out of the floor goes into the back of your servers and not anywhere else. It also keeps not cold air from being entrained from the sides into your servers.

The calculations for HVAC 'CRAC' capacity in a data center are interesting too. In the first CoLo facility we had a 'ROFOR' (right of first refusal) on expanding into the floor area next to our cage, but when it came time to expand the facility had no more cooling capacity left so it was meaningless.

Once you've done this exercise, looking at the 0xide solution will make a lot more sense to you.