RE: How do I max a 6Mbps link
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 220ms? I dont think TCP can handle this. Look for a non-connection oriented protocol to transfer files. UDP for example, or better, raw IP. Maybe you're lucky and get FAST to work :-) - Sten ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
How do I max a 6Mbps link
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 ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
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 ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-isp To unsubscribe, send any mail to [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
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:[EMAIL PROTECTED] -Sent: Wednesday, July 09, 2003 1:19 PM -To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; 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 - -___ -[EMAIL PROTECTED] mailing list -http://lists.freebsd.org/mailman/listinfo/freebsd-isp -To unsubscribe, send any mail to -[EMAIL PROTECTED] - - - -___ -[EMAIL PROTECTED] mailing list -http://lists.freebsd.org/mailman/listinfo/freebsd-isp -To unsubscribe, send any mail to [EMAIL PROTECTED] - ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: How do I max a 6Mbps link
The problem is probably file I/O. I use samba for use with Windows. I can transfer a large file from my FreeBSD server and get almost 10MB/s (using an Intel 10/100 card). However, when I transfer files to FreeBSD, I only get about 6MB/s. I seem to get this same ratio when using FTP transfers as well. This leads me to believe it is I/O bound (my FreeBSD machine has a UDMA66, mainboard limitted to UDMA33, 7200RPM drive in it running softupdates). BTW -- this is one area where Linux (w / reiserfs) kicks the FreeBSD daemon all over town. Tom Veldhouse - Original Message - From: Simon [EMAIL PROTECTED] To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; Max Clark [EMAIL PROTECTED] Sent: Wednesday, July 09, 2003 12:19 PM 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 ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-isp To unsubscribe, send any mail to [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: How do I max a 6Mbps link
Ops, you're absolutely right, I don't know how I got the 3megs, I'm in the middle of getting a mortgage, if you know what I mean. Sorry for any confusion I might have caused. I do know my bits and bytes and I was way off indeed, my mistake. -Simon On Wed, 9 Jul 2003 13:31:54 -0400, Lapinski, Michael (Research) wrote: 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:[EMAIL PROTECTED] -Sent: Wednesday, July 09, 2003 1:19 PM -To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; 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 - -___ -[EMAIL PROTECTED] mailing list -http://lists.freebsd.org/mailman/listinfo/freebsd-isp -To unsubscribe, send any mail to -[EMAIL PROTECTED] - - - -___ -[EMAIL PROTECTED] mailing list -http://lists.freebsd.org/mailman/listinfo/freebsd-isp -To unsubscribe, send any mail to [EMAIL PROTECTED] - ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: How do I max a 6Mbps link
Simon wrote: 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 6Mb/s is more like 900KB/s not 3 megs/sec(Which would be 24Mbps) Adam ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: How do I max a 6Mbps link
On Wed, 9 Jul 2003, 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. You need to increase the maximum TCP window size setting (not sure what sysctl it is) to around 256KB to accommodate the bandwidth/latency product. In brief, 6Mb/1500B frames = 500 frames/sec. Using 250ms for simplicity, you need a large enough TCP window to handle 1/4 of that (125 frames x 1500 bytes/frame = 183KB, round up to 256KB) to permit continuous streaming. Note that TCP windows actually only go to 64KB, you need to use TCP window scaling as a multiplier to go beyond that. Both stations must support it. You can find more info on this on the web, look for high-latency/high-bandwidth. KeS ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: How do I max a 6Mbps link
Wrong again a 6megabit link is exactly 768kilobytes/sec -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lapinski, Michael (Research) Sent: Wednesday, July 09, 2003 1:32 PM To: 'Simon'; [EMAIL PROTECTED]; [EMAIL PROTECTED]; 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:[EMAIL PROTECTED] -Sent: Wednesday, July 09, 2003 1:19 PM -To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; 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 - -___ -[EMAIL PROTECTED] mailing list -http://lists.freebsd.org/mailman/listinfo/freebsd-isp -To unsubscribe, send any mail to -[EMAIL PROTECTED] - - - -___ -[EMAIL PROTECTED] mailing list -http://lists.freebsd.org/mailman/listinfo/freebsd-isp -To unsubscribe, send any mail to [EMAIL PROTECTED] - ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-isp To unsubscribe, send any mail to [EMAIL PROTECTED] ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
RE: How do I max a 6Mbps link
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:[EMAIL PROTECTED] -Sent: Wednesday, July 09, 2003 2:28 PM -To: 'Lapinski, Michael (Research)' -Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] -Subject: RE: How do I max a 6Mbps link - - -Wrong again a 6megabit link is exactly 768kilobytes/sec - - --Original Message- -From: [EMAIL PROTECTED] -[mailto:[EMAIL PROTECTED] On Behalf Of Lapinski, Michael -(Research) -Sent: Wednesday, July 09, 2003 1:32 PM -To: 'Simon'; [EMAIL PROTECTED]; -[EMAIL PROTECTED]; 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:[EMAIL PROTECTED] --Sent: Wednesday, July 09, 2003 1:19 PM --To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; -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 -- --___ --[EMAIL PROTECTED] mailing list --http://lists.freebsd.org/mailman/listinfo/freebsd-isp --To unsubscribe, send any mail to --[EMAIL PROTECTED] -- -- -- --___ --[EMAIL PROTECTED] mailing list --http://lists.freebsd.org/mailman/listinfo/freebsd-isp --To unsubscribe, send any mail to -[EMAIL PROTECTED] -- -___ -[EMAIL PROTECTED] mailing list -http://lists.freebsd.org/mailman/listinfo/freebsd-isp -To unsubscribe, send any mail to [EMAIL PROTECTED] - ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
