[e2e] Google seeks to tweak TCP

[L.Wood@surrey.ac.uk]

Can it be argued that google is attacking the wrong layer?

TCP was not 'designed to deliver the Web's content.' TCP predates the web and http by decades. The internet and TCP user base is rather larger than google's user base of web customers.

TCP was indeed designed to operate over 'a huge range of network types', and decreasing TCP RTO while increasing initial windows decreases TCP's tolerance of the range of networks it can support.
 I look forward to seeing the knock-on effects of decreasing the initial TCP RTO to one second (e.g. interactions with Mobile IP).

Improved and more widely deployed HTTP persistence and pipelining would help; Google's SPDY at least nods to that. Those are germane to web use, and thus to Google's customers. Tweaking (improving?) TCP, not so much.


Lloyd Wood
http://sat-net.com/L.Wood/


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Subject: [e2e] Google seeks to tweak TCP

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Google: Let's Make TCP Faster

http://j.mp/Af4pgb (Google Code Blog)

   "Transmission Control Protocol (TCP), the workhorse of the Internet, is
    designed to deliver all the Web's content and operate over a huge
    range of network types. To deliver content effectively, Web browsers
    typically open several dozen parallel TCP connections ahead of making
    actual requests. This strategy overcomes inherent TCP limitations but
    results in high latency in many situations and is not scalable.  Our
    research shows that the key to reducing latency is saving round trips.
    We're experimenting with several improvements to TCP. Here's a summary
    of some of our recommendations to make TCP faster ..."

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