Hyper-V: Live Migration

Posted on 2014-08-27
Last Modified: 2014-11-12
On my Hyper-V 2012 R2 Standard Host I have two power supplies which are plugged into two different APC UPS's with the same specs.    

Our 2nd Host configured the same way and is plugged into the same two UPS's,

Under what circumstances does a preconfigured, emergency,  live migration make sence?
Question by:howmad2
    LVL 23

    Expert Comment

    You mean when is it feasible to move Virtual servers from 1 host to the other without an emegerncy taking place??
    I'd say when a virtual server is consuming all resources on a fysical Hyper-V host. For as far as i can see there is not other point in doing this. Just my 2 cents btw.
    Oh maybe, for testing to see if your setup actually works.
    LVL 116

    Accepted Solution

    You would normally do a Live Migration if performing maintenance on one of the hosts.
    LVL 3

    Expert Comment

    Your question seems to be centered around PSU's and available power.  Obviously, in the event of a power outage, neither host will be available.

    Depending on the role the VM(s) serve, you may be able to get away with a Quick Migration.  I perform Quick Migrations and the VM is unavailable for less than a minute.  Live Migrations take a considerably longer time.
    LVL 14

    Expert Comment

    by:Shabarinath Ramadasan
    Two points to add here.

    Livemigration can only happen if both source and destination are up and running. In the case of an emergency situation like a hardware failure or power failure - Live migration cannot happen.

    If its a planned downtime, an administrator can move the running virtual machines from one server to another inorder to freeup a node for maintenance. However its not the case when you have unplanned host outages.
    LVL 5

    Expert Comment

    by:Manojkumar Rane
    Live migration only useful for plan maintenance activity. When you want to restart or shutdown 1 host, you can perform live migration and transfer running VM to another Hyper-V host without downtime. If you need high availability, you can use Hyper-V clustering.

    Write Comment

    Please enter a first name

    Please enter a last name

    We will never share this with anyone.

    Featured Post

    What Should I Do With This Threat Intelligence?

    Are you wondering if you actually need threat intelligence? The answer is yes. We explain the basics for creating useful threat intelligence.

    #Citrix #XenApp #Citrix Scout #Citrix Insight Services #Microsoft VMMAP #Microsoft ADEXPLORE #Microsoft RAMMAP #Microsoft TCPVIEW #Microsoft AUTORUNS #Microsoft PROCESS EXPLORER #Microsoft PROCESS MONITOR
    This article is an update and follow-up of my previous article:   Storage 101: common concepts in the IT enterprise storage This time, I expand on more frequently used storage concepts.
    In this Micro Tutorial viewers will learn how they can get their files copied out from their unbootable system without need to use recovery services. As an example non-bootable Windows 2012R2 installation is used which has boot problems.
    This tutorial will walk an individual through the process of configuring basic necessities in order to use the 2010 version of Data Protection Manager. These include storage, agents, and protection jobs. Launch Data Protection Manager from the deskt…

    779 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    12 Experts available now in Live!

    Get 1:1 Help Now