Data Center Power And Efficiency – Public Enemy #1 Or The Latest Media Punching Bag?

This week, the New York Times ran a series of articles about data center power use (and abuse) “Power, Pollution and the Internet” ( and “Data Barns in a Farm Town, Gobbling Power and Flexing Muscle” ( Among the claims made in the articles were that data centers were “only using 6 to 12 % of the energy powering their servers to deliver useful computation. Like a lot of media broadsides, the reality is more complex than the dramatic claims made in these articles. Technically they are correct in claiming that of the electricity going to a server, only a very small fraction is used to perform useful work, but this dramatic claim is not a fair representation of the overall efficiency picture. The Times analysis fails to take into consideration that not all of the power in the data center goes to servers, so the claim of 6% efficiency of the servers is not representative of the real operational efficiency of the complete data center.

On the other hand, while I think the Times chooses drama over even-keeled reporting, the actual picture for even a well-run data center is not as good as its proponents would claim. Consider:

  • A new data center with a PUE of 1.2 (very efficient), with 83% of the power going to IT workloads.
  • Then assume that 60% of the remaining power goes to servers (storage and network get the rest), for a net of almost 50% of the power going into servers. If the servers are running at an average utilization of 10%, then only 10% of 50%, or 5% of the power is actually going to real IT processing. Of course, the real "IT number" is the server + plus storage + network, so depending on how you account for them, the IT usage could be as high as 38% (.83*.4 + .05).
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Microsoft Announces Windows Server 2012

The Event

On Tuesday, September 4, Microsoft made the official announcement of Windows Server 2012, ending what has seemed like an interminable sequence of rumors, Beta releases, and endless speculation about this successor to Windows Server 2008.

So, is it worth the wait and does it live up to its hype? All omens point to a resounding “YES.”

Make no mistake, this is a really major restructuring of the OS, and a major step-function in capabilities aligned with several major strategic trends for both Microsoft and the rest of the industry. While Microsoft’s high level message is centered on the cloud, and on the Windows Server 2012 features that make it a productive platform upon which both enterprises and service providers can build a cost-effective cloud, its features will be immensely valuable to a wide range of businesses.

What It Does

The reviewers guide for Windows Server 2012 is over 220 pages long, and the OS has at least 100 features that are worth noting, so a real exploration of the features of this OS is way beyond what I can do here. Nonetheless, we can look at several buckets of technology to get an understanding of the general capabilities. Also important to note is that while Microsoft has positioned this as a very cloud-friendly OS, almost all of these cloud-related features are also very useful to an enterprise IT environment.

  • New file system — Included in WS2012 is ReFS, a new file system designed to survive failures that would bring down or corrupt the previous NTFS file system (which is still available). Combined with improvements in cluster management and failover, this is a capability that will play across the entire user spectrum.
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Optimism For The Gelsinger Era At VMware

The most notable news to come out of the VMworld conference last week was the coronation of Pat Gelsinger as the new CEO of VMware. His tenure officially started over the weekend, on September 1, to be exact.

For those who don’t know Pat’s career, he gained fame at Intel as the personification of the x86 processor family. It’s unfair to pick a single person as the father of the modern x86 architecture, but if you had to pick just one person, it’s probably Pat. He then grew to become CTO, and eventually ran the Digital Enterprise Group. This group accounted for 55% of Intel’s US$37.586B in revenue according to its 2008 annual report, the last full year of Pat’s tenure. EMC poached him from Intel in 2009, naming him president of the Information Infrastructure Products group. EMC’s performance since then has been very strong, with a 17.5% YoY revenue increase in its latest annual report. Pat’s group contributed 53.7% of that revenue. While he’s a geek at heart (his early work), he proved without a doubt that he also has the business execution chops (his later work). Both will serve him well at VMware, especially the latter.

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