Volker Lendecke put forth on 1/25/2010 1:28 AM: > On Mon, Jan 25, 2010 at 12:14:36AM -0600, Stan Hoeppner wrote: >> Volker Lendecke put forth on 1/24/2010 6:51 AM: >>> On Sun, Jan 24, 2010 at 02:09:51PM +0200, Michael Wood wrote: >>>> Except that he said "I can copy files between the Win2K and WinXP >>>> machines at just over 10MB/s in a single stream and max out the 11MB/s >>>> with two streams." I am assuming he used the same client in that test >>>> as he did with the test against Samba. So from what he's said it >>>> seems that he gets more speed with a Windows server than with Samba >>>> for the same client. >>> >>> So what we need is a full network trace of both cases. >> >> Actually I'll give you something slightly different, and more to the original >> question. I've taken two tcp captures on the Samba server machine. Both >> transfers were performed using the Windows 2000 cli "copy" command pulling a >> 36MB avi file from a share on the Samba server. The first test was a single >> stream copy. The second test was a dual stream copy of the same file >> concurrently to two different destination directories. I also had iftop >> running >> during the tests. The single stream transfer maxed out at just over 64Mb/s. >> The dual stream test maxed out at 92Mb/s. Following are the two tcpdump >> output >> files using "tcpdump -p -s 0 -w FILE port 445": >> >> http://www.hardwarefreak.com/smb_single_stream >> http://www.hardwarefreak.com/smb_dual_stream > > The dual-stream one is kindof limited help. The interesting > piece is how Win->Win does its thing faster, so we need to > see that one.
I've been busting my but trying to get you something meaningful. This dump is less than optimal for two reasons, but it's the best I can get you thus far. 1. Running tshark on Win2K creates a huge network performance hit and thus b/w numbers for small file (<250MB) transfers don't come close to accurately describing the real world. With tshark running the b/w is less than half of normal with small files. 2. Because of this I had to do a huge file copy to allow time for the client to level off at peak performance, which is still ~500KB/s lower than normal due to tshark overhead. Anyway, the file is over 400MB. It'll take quite a while to grab off my server. http://www.hardwarefreak.com/smb-winwin-single-stream Hope you are able to glean something meaningful from it. -- Stan -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba