From mboxrd@z Thu Jan 1 00:00:00 1970 From: Denys Fedorysychenko Subject: Re: [PATCH] tcp: Socket option to set congestion window Date: Wed, 26 May 2010 20:41:01 +0300 Message-ID: <201005262041.01551.nuclearcat@nuclearcat.com> References: <87fx1e1sat.fsf@basil.nowhere.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Cc: Tom Herbert , David Miller , shemminger@vyatta.com, netdev@vger.kernel.org, ycheng@google.com To: Andi Kleen Return-path: Received: from hosting.visp.net.lb ([194.146.153.11]:57220 "EHLO hosting.visp.net.lb" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755929Ab0EZRl0 (ORCPT ); Wed, 26 May 2010 13:41:26 -0400 In-Reply-To: <87fx1e1sat.fsf@basil.nowhere.org> Sender: netdev-owner@vger.kernel.org List-ID: On Wednesday 26 May 2010 20:33:46 Andi Kleen wrote: > Tom Herbert 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? :-)