From owner-freebsd-isp@FreeBSD.ORG Wed Jul 9 11:32:49 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 F310137B401; Wed, 9 Jul 2003 11:32:48 -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 2F43043F85; Wed, 9 Jul 2003 11:32:48 -0700 (PDT) (envelope-from lapinski@crd.ge.com) Received: from int-ch1gw-4.online-age.net (int-ch1gw-4 [3.159.232.68]) h69IWbGI004527; Wed, 9 Jul 2003 14:32:38 -0400 (EDT) Received: from crdns.crd.ge.com (localhost [127.0.0.1]) id h69IWVlL025459; Wed, 9 Jul 2003 14:32:31 -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 h69IWUG13194; Wed, 9 Jul 2003 14:32:30 -0400 (EDT) Received: by xbh01crdge.vpn.ge.com with Internet Mail Service (5.5.2653.19) id ; Wed, 9 Jul 2003 14:32:30 -0400 Message-ID: From: "Lapinski, Michael (Research)" To: "'Dukemaster'" , "Lapinski, Michael (Research)" Date: Wed, 9 Jul 2003 14:32:29 -0400 X-Mailer: Internet Mail Service (5.5.2653.19) cc: freebsd-isp@freebsd.org cc: freebsd-questions@freebsd.org 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 18:32:49 -0000 I said roughly. -------------------------------------------------- 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: Dukemaster [mailto:dukemaster@hardwareelite.com] ->Sent: Wednesday, July 09, 2003 2:28 PM ->To: 'Lapinski, Michael (Research)' ->Cc: freebsd-isp@freebsd.org; freebsd-questions@freebsd.org ->Subject: RE: How do I max a 6Mbps link -> -> ->Wrong again a 6megabit link is exactly 768kilobytes/sec -> -> ->-----Original Message----- ->From: owner-freebsd-isp@freebsd.org ->[mailto:owner-freebsd-isp@freebsd.org] On Behalf Of Lapinski, Michael ->(Research) ->Sent: Wednesday, July 09, 2003 1:32 PM ->To: 'Simon'; freebsd-isp@freebsd.org; ->freebsd-questions@freebsd.org; Max ->Clark ->Subject: RE: How do I max a 6Mbps link -> -> ->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" ->-> ->_______________________________________________ ->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" ->