by Didier Van Hoye A Session full of demos about SMB Direct, ODX, UNMAP, Storage QoS, Live Migration options, DVMQ & vRSS etc. Real life commodity hardware that renders nice performance accessible to everyone.

1. The Scalable & Capable
Cloud OS
Didier Van Hoye

2. Microsoft MVP in Hyper-V
MEET Member
DELL TechCenter Rockstar
Didier Van Hoye
Technical Architect – FGIA
@workinghardinithttp://workinghardinit.wordpress.com

9. Windows Server 2012 R2 Hyper-V
 Performance
 Scalability
 Excellent data protection
 High to continuous availability
 Great Economics
 Leverage existing investment
 Solutions for any size, needs & challenges

10. Hyper-V Storage
– Improvements in the storage stack
– Storage QoS
– VHDX
– ODX/UNMAP

11. IO SCALING LIMITATIONS WITH
W2K8R2
vCPU 0
1 channel per vSCSI Controller
for all attached devices
256 Queue Depth per vSCSI
controller shared for all
attached devices
Storage IO on
vCPU 0 ONLY
Hyper-V Host
Parent Partition
Virtual Storage Stack
VHD VHD
Virtual Machine
vSCSI

12. IO SCALANBILITY WITH W2K12R2
http://workinghardinit.wordpress.com/2012/11/02/hyper-v-
guest-storage-performance-above-beyond-1-million-iops/
vSCSI
vCPU 0 vCPU 1 vCPU 2 vCPU 63
...
Storage IO spread across all vCPUs
1 channel / 16 vCPUs per
device per vSCSI controller
è 4 with 64 vCPUs
256 Queue Depth per
device per vSCSI
controller
VHDX VHDX
Virtual Machine
Hyper-V Host
Parent Partition
Virtual Storage Stack

13. Storage QoS
http://workinghardinit.wordpress.com/2014/01/07/storage-quality-of-service-qos-in-windows-server-2012-r2/
http://workinghardinit.wordpress.com/2014/01/13/how-to-monitor-storage-qos-minimum-iops-and-identify-the-virtual-hardidsk-in-windows-server-2012-r2-hyper-v/
http://workinghardinit.wordpress.com/2014/01/16/where-does-storage-qos-live-in-windows-server-2012-r2-hyper-v/

14. VHDX
Larger Virtual
Disks
Large Sector
Support
Enhanced
Performance
Larger Block
Sizes
Enhanced
Resiliency
Embed
Custom
Metadata
User Defined
Metadata

15. 512e RWM

16. Large Sector Support – 512e
Disks
Hardware
RMW
No Auto Align For Existing VHDs
Hardware
RMW
Windows Server 2012
• New VHDs 4K Aligned - Padding
 Better Performance, Reduced
Need For RMW
4K Aligned
Sub-Optimal Performance For
Existing VHDs ~30%
• 512b structures - Sector Bitmap,
Header, Footer, Parent Locators
 Extra Hardware Read-Modify-Write

17. Large Sector Support – Native
4K Disks
VHDX
Software
RMW
• Support For Native 4K Disks
 Software Read-Modify- Write
• 512b Logical Sector Virtual Disk
 Performance Penalty For RMW
• 4K Logical Sector VHDX
 No Performance Penalty
http://support.microsoft.com/kb/2515143
http://technet.microsoft.com/en-us/library/hh831459

18. Increased Storage Efficiency – Unmap
• Unmap
– Storage Informed Of Unused Space
• Efficiencies At Virtual Layer
• Allows Reuse Of Unused Blocks
• Efficiencies At Physical Layer
– VMs Unmap Passed To Hardware
• Supported On
– VHDX & PassThru Disks
– vSCSI, vIDE or Virtual Fibre Channel
/ iSCSI
VHD Stack

19. Offloaded Data Transfer
(ODX)
Intelligent SAN
Virtual Disk Virtual Disk
Offload Read Token Token Offload Write
Token
Actual Data Transfer

20. High To Continuous Availability
• Online Virtual Disk Merge
• Storage Live Migration
• Shared Nothing Live Migration
• Online Set Parent
• Online resize of VHDX

21. Storage Demos

22. Hyper-V Networking
– Live Migration
• Compression
• SMB Multichannel & SMB Direct
– DVMQ
– vRSS

23. Tips for optimal live migrations
1. Set optimal performance option
2. Bigger Pipes
3. Use jumbo frames
4. Optimize power settings
5. Tweak # of simultaneous live migrations

24. Live Migration Performance Options
• TCP/IP (what we had)
• Compression
• SMB
– SMB MultiChannel
– SMB Direct
• iWarp
• RoCE
• Infiniband

25. No VMQ (W2K8)
All the interrupts of incoming network traffic to a VM has to
be handled by core 0.

26. Static VMQ (W2K8R2)
Sorting, filtering is done by NIC & each VM get a core to
handle the interrupts

27. Dynamic VMQ (W2K12/R2)
Sorting, filtering is done by NIC & the VM(s) gets one or multiple
core dynamically assigned to handle the interrupts

28. Dynamic VMQ & vRSS (W2K12R2)
Sorting, filtering is done by NIC & the VM(s) gets one or
multiple core dynamically assigned to handle the interrupts

29. Network Demos

30. You can have your cookie & eat it to!

31. Didier Van Hoye
Technical Architect – FGIA
Microsoft MVP, MEET Member, DELL TechCenter Rockstar
http://workinghardinit.wordpress.com
@workinghardinit

32. And take home the
Lumia 1320
Present your feedback form when you exit
the last session & go for the drink
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34. Belgiums’ biggest IT PRO Conference