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is Intel VT-d "really" necessary?

Discussion in 'Workarounds and Optimization' started by SoftDux, Sep 15, 2010.

  1. SoftDux

    SoftDux Well-Known Member

    May 27, 2006
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    Johannesburg, South Africa
    cPanel Access Level:
    Root Administrator
    Hi all,

    I'm just curios and would like some input from the community on this one. We're busy budgeting for a couple of new servers and I thought it would be good to try out the Core i7 CPU's, but see the majority of them don't offer VT-d, but just VT-x. Looking at the LGA1366 range, only the "Intel lga1366 i7 980XE" (from the list of what our suppliers stock) have VT-d, and it costs 4x more than "Intel lga1366 i7 930" or 2x more than "Intel lga1366 i7 960". From a budget perspecitve I could purchase 4 more CPU's, which could translate to 40x - 80x more VM's being hosted for the same capital outlay. Experience has shown that we under-utilize CPU's by a great margin and memory / HDD IO is our biggest bottleneck on any server.

    So, if VT-d really necessary?
    We mainly host XEN virtual machine for the hosting industry, i.e. we don't need / use graphics rendering inside VM's, or need DAS on the VM's, etc.

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