Network speed issues - Page 2
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Thread: Network speed issues

  1. #11
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    I got 5000kb/sec or so with only 3% network utilization so mabey i am missinterperting what network utilzation means in the windows volcabulary of things.

    Thanks for all the suggestions and help.

  2. #12
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    kb or KB?

    kb = bits
    KB = bytes

    if its KB 5000 is about what? 50Mbps I belive..approximately.

    Can you test it vice versa? I.e. Install IIS on your windows box and use wget to download from your linux box.
    =

  3. #13
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    KB pardon my caps, i am working on setting up iis right now.

  4. #14
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    From the Windows (serving the file) to the Linux (downlaoding the file) i get about 20,000KB/sec.

  5. #15
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    Ok, well thats about right then....If I'm correct, 20,000KB is something like 165Mbps or more. I don't think you can expect much more, as I believe that you can only download as fast as your hard drive can write.

    However, one would assume that you should be able to hit that kinda of speed downloading to your windows box. Do you have any sort of AV or firewall on the windows machine? Maybe its scanning the file as its downloaded.
    =

  6. #16
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    Well only thing I got running on my windows Box is AVG free. So i'm not sure if it scans traffic but i don't think it dosen't. And i agree i am happy with the speed now.

    ZomBieMann77- i don't have any other windows box that is Gbit able.

    Thank you for all the help guys and gals.

  7. #17
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    Use a real throughput testing tool like ttcp; This tool is often included on linux (or in packages) and also availible as a windows port (http://www.pcausa.com/Utilities/pcattcp.htm).

    This way you eliminate disk read/write and upper layer protocols overhead from the equasion...

    Ammo
    Credit travels up, blame travels down -- The Boss

  8. #18
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    Thanks for that program, here are the outputs of it.
    These are more like the speeds I am looking for how ever I did notice that if I directed the out put to stdout insead of sinking it, the speeds would drop back down to around 300, and that would cause roughly 50% processor utilization and about 3% network according to taskman, i think task man is wrong.

    On another note i found that if i run tcpdump while transfering files off my samba folder it would increase the speed by about 5x any thoughs on that? I means its like hitting the lightning button.

    From windows to linux

    E:\alien>PCATTCP.exe -t 192.168.1.4
    PCAUSA Test TCP Utility V2.01.01.08
    TCP Transmit Test
    Transmit : TCP -> 192.168.1.4:5001
    Buffer Size : 8192; Alignment: 16384/0
    TCP_NODELAY : DISABLED (0)
    Connect : Connected to 192.168.1.4:5001
    Send Mode : Send Pattern; Number of Buffers: 2048
    Statistics : TCP -> 192.168.1.4:5001
    16777216 bytes in .50 real seconds = 32768.00 KB/sec +++
    numCalls: 2048; msec/call: 0.25; calls/sec: 4096.00

    From Linux to windows


    [root@Green log]# ttcp -ts 192.168.1.3
    ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp -> 192.168.1.3
    ttcp-t: socket
    ttcp-t: connect
    ttcp-t: 16777216 bytes in 0.44 real seconds = 37387.27 KB/sec +++
    ttcp-t: 2048 I/O calls, msec/call = 0.22, calls/sec = 4673.41
    ttcp-t: 0.0user 0.4sys 0:00real 97% 0i+0d 0maxrss 0+4pf 9+6csw
    Last edited by Jakus; November 6th, 2006 at 05:09 PM.

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