Date: Wed, 9 Jul 2003 14:32:29 -0400 From: "Lapinski, Michael (Research)" <lapinski@crd.ge.com> To: "'Dukemaster'" <dukemaster@hardwareelite.com>, "Lapinski, Michael (Research)" <lapinski@crd.ge.com> Cc: freebsd-questions@freebsd.org Subject: RE: How do I max a 6Mbps link Message-ID: <E4AAC34FE3CF564D8AE89EB8AC333FD70916516F@xmb03crdge.crd.ge.com>
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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" ->
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