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Submission + - Inside Google's Software-Defined Network (networkcomputing.com)

CowboyRobot writes: At the recent 2013 Open Networking Summit, Google Distinguished Engineer Amin Vahdat presented "SDN@Google: Why and How", in which he described Google's "B4" SDN network, one of the few actual implementations of software-defined networking. Google has deployed sets of Network Controller Servers (NCSs) alongside the switches, which run an OpenFlow agent with a "thin level of control with all of the real smarts running on a set of controllers on an external server but still co-located." By using SDN, Google hopes to increase efficiency and reduce cost. Unlike computation and storage, which benefit from an economy of scale, Google's network is getting much more expensive each year.
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Inside Google's Software-Defined Network

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