Re: [Server-devel] BBR: Congestion-Based Congestion Control

[Adam Holt]

On Dec 4, 2016 6:19 PM, "James Cameron"  wrote:

School server networks fail to perform fairly or effectively because
the loss-based congestion control methods in TCP networking are not a
good match for the wireless environment.

Wireless access points or devices with too much buffering memory make
the problem worse.  A case of more not being good.

Former OLPCer Jim Gettys warned us about bufferbloat years ago.

I'd like to hear from anyone deploying the new BBR congestion-base
controls, which should be available in 4.9 kernels.  It is a
server-side feature, so there's no great need for it in laptops that
operate as clients.


4.9 released yesterday.

With 2 years of LTS support likely/expected:

http://kroah.com/log/blog/2016/09/06/4-dot-9-equals-equals-next-lts-kernel/

References:

http://queue.acm.org/detail.cfm?id=3022184
https://lwn.net/Articles/701165/
http://queue.acm.org/detail.cfm?id=2071893

--
James Cameron
http://quozl.netrek.org/
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[Server-devel] BBR: Congestion-Based Congestion Control

[James Cameron]

School server networks fail to perform fairly or effectively because
the loss-based congestion control methods in TCP networking are not a
good match for the wireless environment.

Wireless access points or devices with too much buffering memory make
the problem worse.  A case of more not being good.

Former OLPCer Jim Gettys warned us about bufferbloat years ago.

I'd like to hear from anyone deploying the new BBR congestion-base
controls, which should be available in 4.9 kernels.  It is a
server-side feature, so there's no great need for it in laptops that
operate as clients.

References:

http://queue.acm.org/detail.cfm?id=3022184
https://lwn.net/Articles/701165/
http://queue.acm.org/detail.cfm?id=2071893

-- 
James Cameron
http://quozl.netrek.org/
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