Date: Mon, 20 Feb 2006 09:50:01 -0000 (GMT) From: bsd@bathnetworks.com To: "Xn Nooby" <xnooby@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: WinSCP mega-slowness Message-ID: <1236.192.168.0.107.1140429001.squirrel@192.168.0.50> In-Reply-To: <bdf25fde0602200127k71ce5c59kcde037bafbdba01b@mail.gmail.com> References: <bdf25fde0602192305m6fff3734x3333c3e1a41e3cf2@mail.gmail.com> <cb5206420602200000k641671cdofb50601131c89622@mail.gmail.com> <bdf25fde0602200127k71ce5c59kcde037bafbdba01b@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> Well, it's good to know I'm not the only one seing this. Right now both > machines are running FreeBSD, since I gave up on waiting for Windows to > copy > the files. The CPU load on Window when sending 1 meg per second is > usually > about 30%, while the Unix box is only at 1-2%. When I have 2 Unix boxes > sending/receiving, I think the load is like 4-5% on both. I'm building a > bunch of packages right now, so I can't get the exact number. I could try > the openssh patch later in the week, that would be great if there was a > unix-side fix for this. Of course as I run FreeBSD more, and Windows less, > the problem will go away, too. > > thanks! > > > > On 2/20/06, Andrew Pantyukhin <infofarmer@gmail.com> wrote: >> >> On 2/20/06, Xn Nooby <xnooby@gmail.com> wrote: >> > For about a year I have noticed that whenever my Windows boxes talk to >> my >> > Unix boxes, they communicate at about 1/10 normal speed. I copy lots >> (300GB) >> > of large files back and forth between machines as I try different >> OS's, >> and >> > I always see this. >> > >> > Specifically, if I copy from FreeBSD to FreeBSD, files transfer at 11 >> megs >> > per second. Between FreeBSD and Linux, at about 8 megs per >> second. Between >> > FreeBSD and Windows, about 1 megabyte per second. This is on >> identical >> > hardware. I've told other people about this, and they usually say I >> must be >> > doing something wrong, but recently a friend of mine upgraded a >> Windows >> box >> > to SP2, and now they are getting this same slowness. When I copy from >> > Windows to WIndows (XP or W2k), I get 11 megs per second. >> > >> > My machines are two P4's with gigabit NICs, and I'm using WinSCP and >> > (somtimes) pscp.exe on WIndows to talk to sshd on FreeBSD. It's >> always >> a >> > shock when I have to copy my data to WIndows, and it takes 30 hours >> instead >> > of 3. >> > >> > Does anyone else ever see this slowness when copying files between >> FreeBSD >> > and Windows? >> > >> > Is Windows maybe capping the transfer speed when it talks to Unix? >> > _______________________________________________ >> > freebsd-questions@freebsd.org mailing list >> > http://lists.freebsd.org/mailman/listinfo/freebsd-questions >> > To unsubscribe, send any mail to " >> freebsd-questions-unsubscribe@freebsd.org" >> > >> >> It is very certainly a known issue. Not that its specifics and >> origins are clearly known, but most of us stumble upon it >> sooner or later. You can usually achieve wire speed only >> between two OSes of a kind. TCP/IP optimizations are >> very important here: if they differ, performance plummets. >> Depends on a multitude of things from quality of NICs to >> weather in your area. I've never been able to get more >> than 70Mbit/s between FreeBSD and Windows XP. I >> always get 90-100Mbit/s between two BSDs or two Win's. >> >> As for your case, 1MB/s is a serious limit. What can you >> tell us about CPU load? Interrupts? Can you try this: >> http://www.psc.edu/networking/projects/hpn-ssh/ >> If you have both the XP and FreeBSD machines on the same internal network, why not enable file sharing on the XP box and use Samba Client on the freeBSD box. I have found SMB to be a lot faster as it is running as a service on XP. Rob
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1236.192.168.0.107.1140429001.squirrel>