Date: Mon, 20 Feb 2006 15:23:10 -0500 From: "fbsd_user" <fbsd_user@a1poweruser.com> To: "Martin Hepworth" <maxsec@gmail.com> Cc: freebsd-questions@freebsd.org Subject: RE: WinSCP mega-slowness Message-ID: <MIEPLLIBMLEEABPDBIEGCEHBHCAA.fbsd_user@a1poweruser.com> In-Reply-To: <72cf361e0602201116g5fcc5551p5bc4f5e77af6a5d4@mail.gmail.com>
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There is a patch to OpenSSH to fix the buffer size problem caused be the different operating systems OpenSSH runs on. When the host and remote are different operating systems the send/receive buffer sizes do not match and this causes drastic slow down. Like in using Winscp client connecting to a FreeBSD box or Linux box. ports/security/hpn-ssh/ contains the patch code to fix this problem in sshd/ssh. Check out the patches home page at http://www.psc.edu/networking/projects/hpn-ssh/ -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Martin Hepworth Sent: Monday, February 20, 2006 2:16 PM Cc: freebsd-questions@freebsd.org Subject: Re: WinSCP mega-slowness Hate to do a me too, but I gotta agree. I did the same file transfer using cygwin's scp and winscp and cygwin was about 10x faster..... 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" > _______________________________________________ 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"
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