From mboxrd@z Thu Jan 1 00:00:00 1970 From: Baruch Even Subject: Re: TCP congestion control for fast, short-distance networks ? Date: Wed, 4 Apr 2007 18:39:11 +0300 Message-ID: <20070404153911.GA32019@galon.ev-en.org> References: <20070403091656.769e5368@localhost.localdomain> <200704032113.l33LDVhp025035@expredir6.cites.uiuc.edu> <20070404080743.5e67245a@localhost.localdomain> <8C944E41FEE84B1-244-BFF@FWM-D41.sysops.aol.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: shemminger@linux-foundation.org, netdev@vger.kernel.org To: davef1624@aol.com Return-path: Received: from rrcs-24-123-59-149.central.biz.rr.com ([24.123.59.149]:48668 "EHLO galon.ev-en.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992969AbXDDPjN (ORCPT ); Wed, 4 Apr 2007 11:39:13 -0400 Content-Disposition: inline In-Reply-To: <8C944E41FEE84B1-244-BFF@FWM-D41.sysops.aol.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org * 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