Virtual Machine Live Migration Overview windows 2012 Hyper-V

Configure Live Migration and Migrating Virtual Machines without Failover Clustering

You can perform a live migration without using failover clustering. A live migration moves running virtual machines between servers running Hyper-V without any perceived downtime
Prerequisites

Your environment Must meets the following prerequisites:

Warning
In Windows Server 2012 R2 Hyper-V live migration has been updated to support migrating Hyper-V virtual machines in Windows Server 2012 to Hyper-V in Windows Server 2012 R2. Moving a virtual machine to a down-level server running Hyper-V is not supported.
  • The source and destination computers either belong to the same Active Directory domain, or belong to domains that trust each other.
  • The user account has the appropriate permission to perform the various steps:
    • The account you use to configure constrained delegation must be a member of the Domain Administrators group.
    • The account you use to configure live migration and to perform the live migrations must be a member of the local Hyper-V Administrators group or the Administrators group on both the source and destination computers.
  • You have a computer running Windows® 8 with the Hyper-V management tools installed. For instructions, see http://technet.microsoft.com/library/hh857623.aspx.

· Live migration outside of a clustered environment.

· In Windows Server 2012, you can configure a virtual machine so that it is stored on an SMB file share. You can then perform a live migration on this running virtual machine between non-clustered servers running Hyper-V, while the virtual machine’s storage remains on the central SMB share. This allows users to gain the benefits of virtual machine mobility without having to invest in the clustering infrastructure if they do not need guarantees of availability in their environment. (Hyper-V with SMB storage can also be configured with Failover Clustering if you do require high availability. For information about different configurations of Hyper-V with SMB storage, see Deploy Hyper-V over SMB.)

· You can also perform a live migration of a virtual machine between two non-clustered servers running Hyper-V when you are only using local storage for the virtual machine. (This is sometimes referred to as a “shared nothing” live migration. In this case, the virtual machines storage is mirrored to the destination server over the network, and then the virtual machine is migrated, while it continues to run and provide network services. For instructions, see Configure Live Migration and Migrating Virtual Machines without Failover Clustering.

· This functionality allows live migration in the most basic deployments and in more advanced scenarios, such as performing a live migration for a virtual machine between multiple, separate clusters to load balance across an entire data center.

Requirements for live migration in a cluster:

  • Windows Failover Clustering is enabled and configured.
  • Cluster Shared Volume (CSV) storage in the cluster is enabled.

Requirements for live migration using shared storage:

  • All files that comprise a virtual machine (for example, virtual hard disks, snapshots, and configuration) are stored on an SMB share.
  • Permissions on the SMB share have been configured to grant access to the computer accounts of all servers running Hyper-V.

Requirements for live migration with no shared infrastructure:

  • No extra requirements exist.

http://technet.microsoft.com/en-us/library/jj134199.aspx

http://technet.microsoft.com/en-us/library/hh831435.aspx

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About Ahmad Sabry ElGendi

https://www.linkedin.com/pub/ahmad-elgendi/94/223/559
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