The Datacenter as a Computer

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• WSCs currently power the services offered by companies such as Google, Amazon, Yahoo, and Microsoft's online services division. They differ significantly from traditional datacenters: they belong to a single organization, use a relatively homogeneous hardware and system software platform, and share a common systems management layer. Often much of the application, middleware, and system software is built in-house compared to the predominance of third-party software running in conventional datacenters. Most importantly, WSCs run a smaller number of very large applications (or Internet services), and the common resource management infrastructure allows significant deployment flexibility. The requirements of homogeneity, single-organization control, and enhanced focus on cost efficiency motiva... (查看原文)

  C55x 2012-01-27 22:17:50

• For traditional servers the cost of failures is thought to be very high, and thus designers go to great lengths to provide more reliable hardware by adding redundant power supplies, fans, error correction coding (ECC), RAID disks, and so on. Many legacy enterprise applications were not designed to survive frequent hardware faults, and it is hard to make them fault-tolerant after the fact. Under these circumstances, making the hardware very reliable becomes a justifiable alternative. In warehouse-scale computers (WSCs), however, hardware cannot easily be made “reliable enough” as a result of the scale. (查看原文)

  [已软注销] 2013-06-24 10:23:10

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