Four short links: 12 May 2015

Data Center Numbers, Utility Computing, NSA Art, and RIP CAP

  1. We Used to Build Steel Mills Near Cheap Sources of Power, but Now That’s Where We Build DatacentersHennessy & Patterson estimate that of the $90M cost of an example datacenter (just the facilities – not the servers), 82% is associated with power and cooling. The servers in the datacenter are estimated to only cost $70M. It’s not fair to compare those numbers directly since servers need to get replaced more often than datacenters; once you take into account the cost over the entire lifetime of the datacenter, the amortized cost of power and cooling comes out to be 33% of the total cost, when servers have a three-year lifetime and infrastructure has a 10-15 year lifetime. Going back to the Barroso and Holzle book, processors are responsible for about a third of the compute-related power draw in a datacenter (including networking), which means that just powering processors and their associated cooling and power distribution is about 11% of the total cost of operating a datacenter. By comparison, the cost of all networking equipment is 8%, and the cost of the employees that run the datacenter is 2%.
  2. Microsoft Invests in 3 Undersea Cable Projects — utility computing is an odd concept, given how quickly hardware cycles refresh. In the past, you could ask whether investors wanted to be in a high-growth, high-risk technology business or a stable blue-chip utility.
  3. Secret Power — Simon Denny’s NSA-logo-and-Snowden-inspired art makes me wish I could get to Venice. See also The Guardian piece on him.
  4. Please Stop Calling Databases CP or AP (Martin Kleppman) — The fact that we haven’t been able to classify even one datastore as unambiguously “AP” or “CP” should be telling us something: those are simply not the right labels to describe systems. I believe that we should stop putting datastores into the “AP” or “CP” buckets. So readable!
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