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10Gbps Slow with SMB direct Transfer

Answered 10Gbps Slow with SMB direct Transfer

  • Thursday, February 14, 2013 6:10 PM
     
     
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    Hi,

    I haven't seen any real resolution to a non-unique problem I've been exploring

    Setup -

    Client:Win 7PC with PCI-e SSD, Broadcom 57711 10Gbps NIC
    Switch: F10 S60 with 10GB Expansion card
    Server: 2k8 R2 with 8 Drive SAS on PERC 5/i, Broadcom 10Gbps NIC

    Issue :  Throughput through SMB maxes at 70MBps,   FTP transfers at 1.2GBps

    Tried adjusting MAX packets and buffer sizes, with little to no impact.   Can anyone explain this and offer a resolution to increase SMB throughput?

     

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  • Friday, February 15, 2013 8:45 AM
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    The slow performance of SMB could be caused by variety of factors.  You may check this blog for some ideas:
    http://msmvps.com/blogs/acefekay/archive/2009/08/20/tcp-chimney-and-rss-features-may-cause-slow-file-transfers-or-cause-connectivity-problems.aspx

     

     
  • Saturday, February 16, 2013 12:22 AM
     
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    Hi,

    A lot of this can actually have to do with the drivers. I had a lot of success with turning off receive side scaling and chimney.

    How to turn chimney on/off: http://technet.microsoft.com/en-us/library/gg162682(v=ws.10).aspx

    Ideally, both RSS and Chimney should be turned on, but this is heavily dependant on your NIC. I am not familiar with the Broadcom, as I only worked with the HP 10G NIC's.

    Also, please check out: http://www.microsoft.com/en-us/download/details.aspx?id=4872 for a number of features and options that might help you get the best out of your 10g network.

    Hope this helps.

    Kind regards,

    Stefan Hazenbroek

    MCSE:S,MCITP:EA,MCITP:EMA2007,MCITP:EMA2010

     
  • Tuesday, February 19, 2013 1:57 AM
     
     
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    @Zehnmonkey

    SMB Direct is only available on Windows 8 or 2012, it is not available for Win 7.

     
  • Wednesday, February 27, 2013 6:50 PM
     
     
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    Thanks.  I created a batch file based on the guide using the following commands.

    start /WAIT netsh int tcp set global rss=disabled
    start /WAIT netsh int tcp set global chimney=disabled
    start /WAIT netsh int tcp set global congestionprovider=none
    start /WAIT netsh int tcp set global autotuninglevel=disabled
    start /WAIT netsh int tcp set global netdma=disabled

     
  • Wednesday, February 27, 2013 9:21 PM
     
     
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    Thanks.  I created a batch file based on the guide using the following commands.

    start /WAIT netsh int tcp set global rss=disabled
    start /WAIT netsh int tcp set global chimney=disabled
    start /WAIT netsh int tcp set global congestionprovider=none
    start /WAIT netsh int tcp set global autotuninglevel=disabled
    start /WAIT netsh int tcp set global netdma=disabled

    Did if fix your issue?

    StarWind iSCSI SAN & NAS

     
  • Wednesday, February 27, 2013 11:13 PM
     
     
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    Not to the point where I'm matching FTP speeds, but it did improve things slightly.