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    Hyper-V Live Migration


     

    live_migration Live Migration is probably the most mentioned feature of the Hyper-V 2.0. It enables system administrators to move virtual machine from one server to another with no downtime. It is very useful if you have a huge network with many virtual and physical servers, and you need to move your virtual machines very often. While Hyper-V 1.0 provides Quick Migration which creates a significant downtime, Live Migration offers really small downtime (measured in milliseconds). It comes for free with a newest version of the Hyper-V, but it requires some additional preconditions to be met. Jaap Wesselius explains this in his post about Hyper-V R2 Live Migration. Go and read it!

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    By Ilija Brajkovic | February 15, 2010
    Tags: , , ,
    Category: hyper-v | View Comments
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    • Ed Middlebrooks

      Yeah, but you're limied to how many of these migrations you can do at once to one. Unline VMware which can automatically vMotion off multiple machines at a time when a host needs additional horsepower for a needy VM, Hyper-V is limited to only 1 VM moving off or onto a given host at any time. in other words, If you want to Live Migrate a VM off of a host but another VM is being migrated on to the same host, you will not be able to move off the first VM because there is a limitation.

    • Ed Middlebrooks

      What the heck is up with all my typos today? …

      Yeah, but you're limited to how many of these migrations you can do at once to only 1 at a time. Unlike VMware which can automatically vMotion off multiple machines at a time when a host needs additional horsepower for a needy VM, Hyper-V is limited to only 1 VM moving off or onto a given host at any time. In other words, If you want to Live Migrate a VM off of a host but another VM is being migrated on to the same host, you will not be able to move off the first VM because there is a limitation.

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