From owner-freebsd-isp@FreeBSD.ORG Wed Jul 9 10:32:47 2003 Return-Path: Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 07D4237B401; Wed, 9 Jul 2003 10:32:47 -0700 (PDT) Received: from ext-ch1gw-5.online-age.net (ext-ch1gw-5.online-age.net [64.37.194.13]) by mx1.FreeBSD.org (Postfix) with ESMTP id F2B4843F93; Wed, 9 Jul 2003 10:32:45 -0700 (PDT) (envelope-from lapinski@crd.ge.com) Received: from int-ch1gw-4.online-age.net (int-ch1gw-4 [3.159.232.68]) h69HW3GI007951; Wed, 9 Jul 2003 13:32:08 -0400 (EDT) Received: from crdns.crd.ge.com (localhost [127.0.0.1]) id h69HVuxf005907; Wed, 9 Jul 2003 13:31:57 -0400 (EDT) Received: from xbh01crdge.crd.ge.com (xbh01crdge.crd.ge.com [3.159.72.22]) by crdns.crd.ge.com (8.11.6p2/8.11.6) with ESMTP id h69HVtG06657; Wed, 9 Jul 2003 13:31:55 -0400 (EDT) Received: by xbh01crdge.vpn.ge.com with Internet Mail Service (5.5.2653.19) id ; Wed, 9 Jul 2003 13:31:55 -0400 Message-ID: From: "Lapinski, Michael (Research)" To: "'Simon'" , freebsd-isp@freebsd.org, freebsd-questions@freebsd.org, Max Clark Date: Wed, 9 Jul 2003 13:31:54 -0400 X-Mailer: Internet Mail Service (5.5.2653.19) Subject: RE: How do I max a 6Mbps link X-BeenThere: freebsd-isp@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Internet Services Providers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jul 2003 17:32:47 -0000 1) "6mbps link, which is roughly 3megs/sec" is inaccurate 6 Mbits is roughly 600kilobytes/second 2) A common way to speed up transfers is to tune your tcp window sizes using /sbin/sysctl. The two you may wish to lok at are: net.inet.tcp.sendspace net.inet.tcp.recvspace try values like 128000 and 256000 Doing so so on bnoth machien sshould increase your throughput. A good reference for all the syctl variable is available at http://people.freebsd.org/~adrian/sysctl.descriptions, the freebsd manual may have em soemwhere but i cant recall where. -mtl -------------------------------------------------- Michael Lapinski Computer Scientist GE Research "I think there is a world market for maybe five computers." - IBM Chairman Thomas Watson, 1943 ->-----Original Message----- ->From: Simon [mailto:simon@optinet.com] ->Sent: Wednesday, July 09, 2003 1:19 PM ->To: freebsd-isp@freebsd.org; freebsd-questions@freebsd.org; Max Clark ->Subject: Re: How do I max a 6Mbps link -> -> -> ->Sounds like you have a problem with your server/network hardware or ->firewall/proftpd settings. FreeBSD out of the box on low-end ->Intel hardware ->can easily sustain 6mbps link, which is roughly 3megs/sec. Make sure ->your harddrive on receiving end can write at least this fast ->and your network ->is capable of such transfers. Sometimes faulty switches/cable ->wires can ->cause packet loss/delays, causing a bottleneck. It could be a ->number of ->things, but I would start with testing your network. -> ->-Simon -> ->On Wed, 9 Jul 2003 10:12:03 -0700, Max Clark wrote: -> ->>Hi all, ->> ->>What configuration changes do I need to make to two ->freebsd-stable boxes to ->>fully max out a 6Mbps/220ms network link? This is for bulk ->500+MB file ->>transfers. ->> ->>The target application is proftpd with ncftpd as the client. ->> ->>Thanks in advance, ->>Max ->> ->>_______________________________________________ ->>freebsd-isp@freebsd.org mailing list ->>http://lists.freebsd.org/mailman/listinfo/freebsd-isp ->>To unsubscribe, send any mail to ->"freebsd-isp-unsubscribe@freebsd.org" ->> -> -> ->_______________________________________________ ->freebsd-isp@freebsd.org mailing list ->http://lists.freebsd.org/mailman/listinfo/freebsd-isp ->To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org" ->