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Windows Storage Server 2008 -- write caching on NFS mounted volumes supported ?

Answered Windows Storage Server 2008 -- write caching on NFS mounted volumes supported ?

  • Wednesday, November 14, 2012 9:24 AM
     
     
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    Hi,

    Has anybody heard of this before ? It seems that writing to NFS mounted volumes from Windows 2008 Storage Server is s-l-o-w --- I have a situation where reading from the NFS-volume has a performance of 60 Mbyte/Sec --- however writing to the volume only has a performance of less than 5 MByte/Sec...

    How is write caching on NFS mounted volumes handled --- if handled at all ? --- Is write caching supported/enabled by default on Storage Server 2008 --- and if not, - can write caching be enabled ?

    Cheers,

    Joern.

     

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  • Wednesday, November 14, 2012 1:07 PM
     
     
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    Hi,

    Has anybody heard of this before ? It seems that writing to NFS mounted volumes from Windows 2008 Storage Server is s-l-o-w --- I have a situation where reading from the NFS-volume has a performance of 60 Mbyte/Sec --- however writing to the volume only has a performance of less than 5 MByte/Sec...

    How is write caching on NFS mounted volumes handled --- if handled at all ? --- Is write caching supported/enabled by default on Storage Server 2008 --- and if not, - can write caching be enabled ?

    Cheers,

    Joern.

    Do you have the same results with say Linux client?

    StarWind iSCSI SAN & NAS

     
  • Wednesday, November 14, 2012 1:14 PM
     
     
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    Yes!
     
  • Wednesday, November 14, 2012 10:16 PM
     
     
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    Can you create the SMB share on the same volume and compare NFS and SMB read/write speeds? If it's the same I'd suspect something is wrong with you disk config (RAID5, disabled write cache @ RAID controller etc).

    StarWind iSCSI SAN & NAS

     
  • Thursday, November 15, 2012 2:42 PM
     
     
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    Already tried this --- and it's only when using NFS writes we see the slow performance.

     
  • Monday, November 19, 2012 8:32 AM
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    Hi,
     
    Thank you for your question.

    I am trying to involve someone familiar with this topic to further look at this issue. There might be some time delay. Appreciate your patience.
     
    Thank you for your understanding and support.

    TechNet Subscriber Support in forum |If you have any feedback on our support, please contact tnmff@microsoft.com.

     
  • Monday, November 19, 2012 1:57 PM
     
     
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    Thanks - however problem has now been elevated through official channels --- I am waiting for assistance from here.

    Joern.

     
  • Tuesday, November 20, 2012 9:17 AM
     
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    Hi,

    Mounted volumes are not handled correctly by Network File System (NFS) shares and should be avoided in environments where Server for NFS is used. 
    http://blogs.msdn.com/b/sfu/archive/2008/04/14/all-well-almost-about-client-for-nfs-configuration-and-performance.aspx

    Thanks,

    Kevin Ni

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