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Windows Server 2008 R2 SP1 Hyper-V VM migration RTT spec

Respondida Windows Server 2008 R2 SP1 Hyper-V VM migration RTT spec

  • lunes, 26 de marzo de 2012 19:57
     
     
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    What is the Windows Server 2008 R2 SP1 Hyper-V VM migration maximum RTT spec in support of a Live Migration? For comparison, for a VMware vSphere 5.0 vMotion the maximum RTT spec supported is 10msec. I've heard values of 30msec, 50msec for Hyper-V but can't find any reference on the MS website. Thanks.
     

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  • martes, 27 de marzo de 2012 2:15
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    Hi,
     
    What’s the meaning of RTT in your description?
     
    By the way, if you mean the “downtime” when you perform a live migration, the answer is it depends. The result with different hardware configuration is different.
     

    Vincent Hu

    TechNet Community Support

     
  • martes, 27 de marzo de 2012 15:04
     
     
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    The context is two geographically separated data centers, with an intervening WAN connection, over which a live VM migration is performed from a source Hyper-V to destination Hyper-V pair of hypervisors. So the RTT (latency) is the combination of all delays between that pair of hypervisors (e.g., L2 LAN switches, routers, transport/fiber prop delay) times two. Assume that the WAN connection bandwidth is at least GigE, so that isn't a limiting factor. Assume compatible blade processors/hardware at each end. Note that I'm not referring to the "pause time/downtime" experienced by the application running in the VM - hopefully that is only a few seconds. Thanks.

    David W. Martin

     
  • viernes, 30 de marzo de 2012 15:00
     
     
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    So far, we haven't published any information about this. 

    Thanks
    Zero

    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

     
  • viernes, 30 de marzo de 2012 15:30
     
     
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    EMC appears to imply that Hyper-V supports VM migration between DCs with up to a 50ms RTT. See page 4 (last page) of their brochure at: http://www.emc.com/collateral/hardware/data-sheet/h7070-vplex-family-ds.pdf

    Thanks.

    David W. Martin

     
  • lunes, 02 de abril de 2012 1:09
     
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     This is information from EMC, but we haven't published any informaiton about this. We may publish some information in the future.

    Thanks
    Zero

    Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

    • Marcado como respuesta David W. Martin lunes, 02 de abril de 2012 15:27
    •