Date: Fri, 19 Oct 2001 15:14:29 -0400 From: "webdesigns COMNET" <webdesigns@comnet.ca> To: "Patrick O'Reilly" <patrick@mip.co.za> Cc: <questions@FreeBSD.ORG> Subject: Re: ftp hogging bandwidth Message-ID: <004d01c158d2$4bf9c0c0$0200000a@critter> References: <NDBBIMKICMDGDMNOOCAIGEJMDLAA.patrick@mip.co.za>
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Hi, > Jason, > > I'm afraid I have not used queues myself, so I have no experience on that. > > It seems to me that the idea is that you may attach multiple queues to one > pipe, and if the weights of the queues are equal then they will each receive > a fair distribution of the bandwidth available to the pipe, but if some > queues have more weight then they should get more of the available bandwidth > (a bigger slice of the pie :). The man page does not make it very clear > whether a weight of 1 gets more and 100 less, or vice-versa. > > The sample line in that message was simply restated from the question raised > by the original poster. He was already using a value of 30, so I left it > untouched. > > In my use of DUMMYNET I have simply used pipes themselves, without queues, > and that has been sufficient for my needs. > > Notice what Jason Borkowsky wrote (or is that you too?) Not that isnt me :) Thank you for your reply. I was a little enlightened on what role the weigth would have to the pipe queue. > > -----Original Message----- > > From: owner-freebsd-questions@FreeBSD.ORG > > [mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Jason Borkowsky > > Sent: 18 October 2001 19:39 > > To: questions@FreeBSD.ORG > > Cc: josh@bitstream.net > > Subject: Re: ftp hogging > > > > > > > > I don't know if anybody answered this, but if you use IPFW, you can do > > this easily as follows: > > > > ipfw pipe 10 config bw 16Kbit/s queue 100 > > > > where "pipe 10" is the ID of the pipe, bw is the bandwidth of the pipe, > > and queue is the number of packets this pipe queue will hold while waiting > > for transmission. The above command defines to the pipe. To use it, add > > the next line as well: > > > > ipfw add pipe 10 tcp from any 22 to any out xmit fxp0 > > > > where "pipe 10" is the ID again of the pipe to use, 22 is the ftp TCP > > protocol number, and fxp0 is the outgoing interface. > > This is pretty much what I do. > > Patrick. > > > -----Original Message----- > > From: webdesigns COMNET [mailto:webdesigns@comnet.ca] > > Sent: 19 October 2001 03:44 > > To: Patrick O'Reilly > > Cc: questions@FreeBSD.ORG > > Subject: Re: ftp hogging bandwidth > > > > > > On that page, I read: > > ipfw queue 1 config pipe 1 weight 30 mask dst-ip 0x000000ff (ssh > > connections may use 100% of available bandwidth) > > What does tha value "weight 30" mean exactly? > > I'm not to clear with the man explanation: weight weight > > Specifies the weight to be used for flows matching > > this queue. > > The weight must be in the range 1..100, and defaults to 1. > > Jason > > > > > > ----- Original Message ----- > > From: "Patrick O'Reilly" <patrick@mip.co.za> > > To: "Weldon S Godfrey 3" <weldon@excelsus.com>; "Joshua Holland" > > <josh@bitstream.net> > > Cc: <questions@FreeBSD.ORG> > > Sent: Thursday, October 18, 2001 4:09 AM > > Subject: RE: ftp hogging bandwidth > > > > > > > Yes - look into ipfw, and specifically its DUMMYNET feature. > > > > > > Check this in the question list archive for some more details: > > > > > http://docs.freebsd.org/cgi/getmsg.cgi?fetch=1160624+0+current/fre > > ebsd-quest > > > ions > > > > > > Patrick. > > > > > > > -----Original Message----- > > > > From: owner-freebsd-questions@FreeBSD.ORG > > > > [mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Weldon S > > > > Godfrey 3 > > > > Sent: 17 October 2001 19:56 > > > > To: Joshua Holland > > > > Cc: questions@FreeBSD.ORG > > > > Subject: Re: ftp hogging bandwidth > > > > > > > > > > > > > > > > You mean the machine is bogging down or your outside connection is > > getting > > > > bogged down? > > > > > > > > I think the ftp session is taking your entire fractional T. I don't > > think > > > > it would be slowing down your machine too much. > > > > > > > > IPFW I *think* has rate shaping ability. You might be able > > to add rules > > > > to set ftp to a certain bandwidth. > > > > > > > > I am now going beyond my experience, I haven't tried to rateshape on a > > > > freebsd box yet. > > > > > > > > > > > > On Wed, 17 Oct 2001, Joshua Holland wrote: > > > > > > > > > I think they were ftp-ing through our box to an off site location. > > > > > > > > > > >I assuming that someone is ftping to a ftp server that is also your > > > > > >nat/firewall box? > > > > > > > > > > > >One really cheezy way would be this: > > > > > > > > > > > >Have 2 nics on your server > > > > > > > > > > > >1 nic has the IP address for ftp. In DNS you can make that IP > > > > be whatever > > > > > >you want (ftp.localhost, ftp.biststeam.net, etc) > > > > > > > > > > > >the other nic is doing the rest of your internal lan stuff > > > > > > > > > > > >and since you are doing nat, you might have a 3rd nic for WAN. > > > > > > > > > > > > > > > > > >if you don't have a 100Mb shared hub, or want to lower the ftp > > > > bandwidth > > > > > >further for some reason, you could force the dedicated ftp nic to > > 10Mb > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >On Wed, 17 Oct 2001, Joshua Holland wrote: > > > > > > > > > > > >> Hello, > > > > > >> > > > > > >> I help administer a FreeBSD machine that runs nat, > > dhcpd, mail and > > > > > >> web servers for an organization with about 75 desktop clients. > > They > > > > > >> have a 256k fractional T1. We have noticed the machine bogging > > down > > > > > >> sometimes (people complaining of extremely slow web page > > > > loading, and > > > > > >> when I ssh in, very slow response). Top shows less > > than 1% of CPU > > > > > >> being used. This last time, it seems someone was > > ftp-ing a 100MB > > > > > >> file, and when they terminated the transfer, everything was fast > > > > > >> again. Is there anyway to prevent one client or process > > > > from hogging > > > > > >> all that bandwidth? > > > > > >> > > > > > >> Joshua Holland. > > > > > >> > > > > > >> > > > > > >> To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > > > > with "unsubscribe freebsd-questions" in the body of the message > > > > > > > > > > > > > > > > > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > > with "unsubscribe freebsd-questions" in the body of the message > > > > > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > > with "unsubscribe freebsd-questions" in the body of the message > > > > > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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