Mark, I have noted the same behavior many times. I have an old server box that has not been upgraded since ver. 2.2.8. Whenever I connect from a linux box using sftp in a terminal, I get top speed 10/100 ethernet transfer rates over the LAN -- 10 Megs/sec. - 12 Megs/sec. When I use WinSCP (from a win client box), I get no more than 2 Megs/sec. transfer rate.
I wish I could articulate the why, but I cannot. But it doesn't appear to be a Samba issue, it seems to me that the software applications we are using handle TCP data transfer very differently and are optimized to do things very differently. I can add some anecdotal evidence regarding VNC --- I use RealVNC between my work winbox and a Win Server 2003 and sometimes transfer 1 Gig. .iso files between them. I never measured exactly, but from memory I know it always takes at least 5 minutes over my 10/100 LAN. Optimally, it should require no more than 2 minutes to complete such a transfer. I don't mean to compare apples vs. oranges (win/linux transfers vs. win/win transfers) but I think it helps to show it's the transfer software and probably not win, or linux, or samba. I hope someone else on the list with more empirical knowledge can confirm and provide the "why". HTH, Mike On 7/19/07, Mark Baily <[EMAIL PROTECTED]> wrote:
Hi, I have a problem with file transfers between a windows systems and unix systems. I have one win32 desktop (intel e6400 2Gb Ram), one win32 laptop (p-m 2Ghz). Also one linux laptop (p-m 1.4GHz) and one opensolaris desktop (intel e4400 1GB Ram). The two laptops have built-in 100Mbit ethernet and desktops have 1Gbit ethernet on the motherboard. Both desktops use a Marvell Yukon. The file transfer rate between two systems using FTP between the two desktops (win32 to opensolaris) is consistently 50Mb/sec which is as expected. Using scp I only get 5Mb/sec between from any win32 system to any unix system, much slower than expected. Using scp from the linux lapotp to solaris desktop is 10Mb/sec as expected (laptop has 100mbit only). Using samba to copy a 1GB file I get about 7 minutes from win32 to opensolaris. From opensolaris to win32 the windows dialog says estiamted time 142 mins. Using plain FTP it takes 25sec. This is very consistent. A twist is that if a VNC client is open from the win32 desktop to the opensolaris box the estimated transfer time via samba from opensolaris to win32 drops right down to about 4 min. Much better, but still nowhere near the FTP. I have also tried swapping between a D-Link DGS-1008D switch and a Netgear GS105 switch with no difference. Since the FTP is very consistently acheiving 50megabytes/sec, I don't think it can be blamed on a hardware fault. However the problem doesn't appear to be just samba either, as the slowness also occurs with scp, albiet scp is much more consistent at 5mb/sec than samba varying at 1GB/142min to 1GB/3min with VNC open. Is this problem something to do with TCP stacks playing up? What else might it be? Thanks -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/listinfo/samba
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