From mboxrd@z Thu Jan 1 00:00:00 1970 From: davef1624@aol.com Subject: Re: TCP congestion control for fast, short-distance networks ? Date: Wed, 04 Apr 2007 11:58:15 -0400 Message-ID: <8C944E930D99B5D-244-E4B@FWM-D41.sysops.aol.com> References: <20070403091656.769e5368@localhost.localdomain> <200704032113.l33LDVhp025035@expredir6.cites.uiuc.edu> <20070404080743.5e67245a@localhost.localdomain> <8C944E41FEE84B1-244-BFF@FWM-D41.sysops.aol.com> <20070404153911.GA32019@galon.ev-en.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Content-Transfer-Encoding: 7bit Cc: shemminger@linux-foundation.org, netdev@vger.kernel.org To: baruch@ev-en.org Return-path: Received: from imo-m20.mx.aol.com ([64.12.137.1]:63734 "EHLO imo-m20.mx.aol.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992982AbXDDQDj (ORCPT ); Wed, 4 Apr 2007 12:03:39 -0400 In-Reply-To: <20070404153911.GA32019@galon.ev-en.org> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Thanks - so you are suggesting we enable 802.3 flow-control / pause-frames? (it's currently disabled) -----Original Message----- From: baruch@ev-en.org To: davef1624@aol.com Cc: shemminger@linux-foundation.org; netdev@vger.kernel.org Sent: Wed, 4 Apr 2007 8:39 AM Subject: Re: TCP congestion control for fast, short-distance networks ? * davef1624@aol.com [070404 18:29]: > Hello, > > We are currently using both 1 Gb & 10 Gb links, that interconnect several servers that are very *local* to > each other. > Typical RTT times range from 0.2 ms - 0.3 ms. > > We are currently using TCP reno - is there a more suitable congestion control algorithm for our > application, > especially using the 10 Gb links ? > (Most of the High-Speed TCP algorithms seem suitable for large RTT, long-distance networks). I'm not aware of any tests for high speed links with very low RTTs, but I suspect that the new algorithms will not change much, if the connections you have are indeed local than the Ethernet pause mechanism is more effective for the flow control you need. Baruch - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html ________________________________________________________________________ AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com.