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Can I use 2 physical servers to create 1 virtual machine that uses RAM on both servers?

Odpovědět Can I use 2 physical servers to create 1 virtual machine that uses RAM on both servers?

  • 15. května 2012 7:09
     
     
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    Dears,

    I have 2 servers with 32 GB of ram and i installed windows server 2008 R2 on both, i need to create virtual machine that have 64GB of RAM, can i do this? please help me.

    thanks

     

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  • 15. května 2012 8:07
     
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    I do not think that you can do so because accessing memory requires a very fast bus to the processor via the computer motherboard.

    Also, memory management is done through the OS but you have two computers with 2 different OS as you know each OS is isolated from the other but they can share storage resources like hard disks, SAN, or NAS because accessing the storage is slower than accessing the memory.

    Who knows you may be able to do so in the future with new technology which is not available nowadays.


    Mahair Ashaboon MCSE & Network+ www.extra-it.com

     
  • 15. května 2012 8:23
     
     
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    But as I know, it's available with VMware and Citrix,,, but i wonder why it's not available with Microsoft Hyper-V ??!!
     
  • 15. května 2012 8:56
     
     
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    No, i do not think is possible on VMware too, but VMware has DRS and is possibile to overcommit memory (similar to Hyper-V Dynamic Memory) and perhaps you refer to these.

    Anyway with the technology of today spanning one big VM across multple host is fantasy :)

    /Mat

     
  • 15. května 2012 9:06
     
     
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    OK thanks
     
  • 15. května 2012 15:44
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    DRS is not overcommitment - DRS is auto load balancing. 

    Dynamic Memory is a form of ballooning, not overcommitment.  ESX also does ballooning, but not in the way Dynamic Memory does.  Overcommitment has a price, and that price is performance and storage use.

    NO hypervisor on the market today allows a single VM workload to be spanned across two hypervisors / servers / physical systems.  The nature of the VM container does not support this in any way today.  Some point int he future maybe, but not today.

    This is where disturbuted computing comes into play - many machines working at hte same proboem, sharing in the processing power.  HPC, Hadoop, etc.  These workloads run as VMs on hypervisors - but it is not the VMs that run this way.

    Brian Ehlert
    http://ITProctology.blogspot.com
    Learn. Apply. Repeat.
    Disclaimer: Attempting change is of your own free will.

     
  • 15. května 2012 19:01
     
     
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    Sorry Mohammad, I do not know too much about VMWare or Citrix features as I am a Microsoft specialist but I thank you for sharing this info with us and I thank all participants.

    Keep up the good work guys.

    Mahair Ashaboon MCSE & Network+ www.extra-it.com

     
  • 16. května 2012 8:08
     
     
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    Thank you all for your help
     
  • 17. května 2012 15:35
     
     
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    You are welcome Mohammed.

    Please provide all participants in this post with your feedback.

    Thanks.

    Mahair Ashaboon MCSE & Network+ www.extra-it.com