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Hyper-V VPS Disk I/O bottleneck??

Unanswered Hyper-V VPS Disk I/O bottleneck??

  • Montag, 6. Februar 2012 16:22
     
     
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    Hi All,

    I am facing a weird disk I/O issue on my Hyper-V node. I have 4 x 1TB disks in RAID-10. We have around 10 Virtual Machines running and still there is some issue with the disk I/O.

    When we perform a disk intensive activity on the node, then the Disk I/O can easily go upto 150Mbps. But when any disk intensive activity is performed on a VPS, the disk I/O cannot go over 10Mbps even when there isn't any load on the node.

    Would really appreciate a little help in this regard. Is there some setting which has to be changed so that VPS can overcome the disk I/O bottleneck of 10mbps?

    Thanks in advance!
    • Verschoben Kristian NeseMVP Montag, 20. Februar 2012 12:15 (From:Cloud Computing: Infrastructure as a Service)
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Alle Antworten

  • Dienstag, 3. April 2012 05:04
     
     
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    Hello,

    You are specifically seeing this performance issue when copying data within the virtual machines?  Under what circumstances do you see the IO difference?   If you could describe your situation a little further that would help.

    Nathan Lasnoski

    http://blog.concurrency.com/author/nlasnoski/

     
  • Dienstag, 3. April 2012 12:40
     
     
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    How are your nodes connected to the shared storage?

    If via iSCSI check your links, cables, and switch settings. Might be a bad link in there running at 100Mbit if your throughput is at 10MB/Second (MB = Megabytes Mb = Megabits).

    Philip Elder SBS MVP Blog: http://blog.mpecsinc.ca

     
  • Freitag, 11. Mai 2012 04:03
     
     
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    Can you try applying this update and see if it fixes the problem?

    http://support.microsoft.com/kb/2517329

    Nathan Lasnoski

    http://blog.concurrency.com/author/nlasnoski/

     
  • Freitag, 11. Mai 2012 06:14
     
     
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    I have experience the same at my own server and other clients aswell, without any luck, so looking forward to see the outcome of this question. What kind of hard-drives do you run? SATA, Nearline SAS or SAS?
     
  • Freitag, 11. Mai 2012 21:59
     
     
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    I'd go through the list of recomended hotfixes first, then see if you still have the problem.

    http://technet.microsoft.com/en-us/library/ff394763(WS.10).aspx

    You may also want to disable C states.