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2. Module 3: Keeping the Lights on with Hyper-V Live Migration Andrew McMurray Technical Evangelist – Windows Infrastructure Microsoft Corporation
Microsoft Virtual Academy

3. Live Migration Faster, Simultaneous Migration of VMs Without Downtime
Faster live migrations, taking full advantage of available network
Simultaneous Live Migrations
Uses SMB Direct if network bandwidth available is over 10 gigabits
Supports flexible storage choices
No clustering required if virtual machine resides on SMB 3.0 File Share
Modified pages transferred
Storage handle moved
Memory pages transferred
Live migration setup
Modified memory pages VM VM VM
Configuration data
MEMORY
MEMORY
Memory content
IP connection
Target host
iSCSI, FC or SMB Storage

4. Live Migration with Compression
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Live Migration with Compression
Intelligently Accelerates Live Migration Transfer Speed
Storage handle moved
Modified pages compressed, then transferred
Memory pages compressed, then transferred
Live migration setup
Utilizes available CPU resources on the host to perform compression
Compressed memory sent across the network faster
Operates on networks with less than 10 gigabit bandwidth available
Enables a 2X improvement in Live Migration performance
Modified memory pages VM VM VM
MEMORY
MEMORY
Configuration data
Memory content
IP connection
Target host
iSCSI, FC or SMB Storage

5. Live Migration over SMB
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Live Migration over SMB
Harness RDMA to Accelerate Live Migration Performance
Memory pages transferred at high speed
Storage handle moved
Modified pages transferred at high speed
Live migration setup
SMB Multichannel uses multiple NICs for increased throughput and resiliency
Remote Direct Memory Access delivers low latency network, CPU utilization & higher bandwidth
Supports speeds up to 56Gb/s
Windows Server 2012 R2 supports RoCE, iWARP & Infiniband RDMA solutions
Delivers the highest performance for Live Migrations
Cannot be used with Compression
Modified memory pages VM VM
Memory content VM
Configuration data
MEMORY
MEMORY
IP Connection using RDMA
Target host
iSCSI, FC or SMB Storage

6. Storage Live Migration
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Storage Live Migration
Move virtual hard disks attached to a running virtual machine
Manage storage in a cloud environment with greater flexibility and control
Move storage with no downtime
Update physical storage available to a virtual machine (such as SMB-based storage)
Windows PowerShell cmdlets
Disk writes are mirrored; outstanding changes are replicated
Reads and writes go to new destination VHD
Disk contents are copied to new destination VHD
Reads and writes go to the source VHD
Increased Flexibility through Live Migration of VM Storage
Virtual machine
Host running Hyper‑V
Source device
Target device
VHD
VHD

7. Shared-Nothing Live Migration
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Shared-Nothing Live Migration
Reads and writes go to the source VHD. Live Migration Begins
Reads and writes go to the source VHD
Disk contents are copied to new destination VHD
Live Migration Continues
Live Migration Completes
Disk writes are mirrored; outstanding changes are replicated
Complete Flexibility for Virtual Machine Migrations
Increase flexibility of virtual machine placement & increased administrator efficiency
Simultaneously live migrate VM & virtual disks between hosts
Nothing shared but an ethernet cable
No clustering or shared storage requirements
Reduce downtime for migrations across cluster boundaries
Virtual
machine
Memory content
Destination Hyper‑V
Virtual
machine
Source Hyper‑V
Live Migration
MEMORY
MEMORY
Modified memory pages
Configuration data
IP connection
Source device
Target device
VHD
VHD

8. Live Migration Upgrades
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Live Migration Upgrades
Simplified upgrade process from 2012 to 2012 R2
Customers can upgrade from Windows Server 2012 Hyper-V to Windows Server R2 Hyper-V with no VM downtime
Supports Shared Nothing Live Migration for migration when changing storage locations
If using SMB share, migration transfers only the VM running state for faster completion
Automated with PowerShell
One-way Migration Only
Hyper-V Cluster Upgrade without Downtime
2012 Cluster Nodes
2012 R2 Cluster Nodes 1 2 3 1 3 2
Hyper-V Hosts
SMB Storage

9. Demo

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11. 6/21/2019 9:05 AM
© 2012 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
© 2010 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.