[OpenAFS-devel] how does fileserver read from disk?

Chaskiel M Grundman cg2v@andrew.cmu.edu
Wed, 21 Sep 2005 18:14:23 -0400


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--On Wednesday, September 21, 2005 17:36:18 -0400 Tom Keiser=20
<tkeiser@gmail.com> wrote:

> That tight loop is the equivalent of building
> a TCP implementation that doesn't support window sizes larger than 1
> MTU!

Not quite. A tcp implementation with a window size of 1 mtu will wait for=20
each packet to be acked before sending the next. rx does not work that=20
way... The sendmsg may have to wait if the network is busy, but it won't be =

spending lots of "real" time.

Two general comments:

You are proposing some fairly radical changes and making fairly strong=20
claims about what the results of those changes will be. You should expect a =

fair bit of skepticism.

<silly_saying>You can attract more flies with honey than with=20
vinegar</silly_saying>

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