netdev - Re: [PATCH] tcp: Socket option to set congestion window

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Message-Id: <201005262041.01551.nuclearcat@nuclearcat.com>
Date:	Wed, 26 May 2010 20:41:01 +0300
From:	Denys Fedorysychenko <nuclearcat@...learcat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Tom Herbert <therbert@...gle.com>,
	David Miller <davem@...emloft.net>, shemminger@...tta.com,
	netdev@...r.kernel.org, ycheng@...gle.com
Subject: Re: [PATCH] tcp: Socket option to set congestion window

On Wednesday 26 May 2010 20:33:46 Andi Kleen wrote:
> Tom Herbert <therbert@...gle.com> writes:
> > Thanks to NAT, the concept of a network path or even host specific
> > path is a weakened concept.  On the Internet this may be a path
> > characteristic per client, which unfortunately has no visibility in
> > the kernel other than per connection state.  When a single IP address
> > may have thousands of hosts behind it, caching TCP parameters for that
> > IP address is implicitly doing a huge aggregation-- probably dicey...
> 
> Yes all of Saudi-Arabia used to be (is?) one IP address...
> 
> Caching anything per IP is bogus.
> 
> -Andi
> 
In Lebanon i have around 30k users behind few IP addresses(around 6) (for 
web).
Because backbone here $1200/Mbit, and satellites mostly(rtt 400+ ms)... so TCP 
accelerators and caching proxy a must. Tproxy doesn't work well yet to use 
full set of ip's.

And no local google/youtube servers, so maybe i'm affected by something? :-)
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