The Scalable & CapableCloud OS

Didier Van Hoye

Microsoft MVP in Hyper-V

MEET Member

DELL TechCenter Rockstar

Didier Van HoyeTechnical Architect – FGIA

@workinghardinithttp://workinghardinit.wordpress.com

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

Hyper-V Storage

– Improvements in the storage stack– Storage QoS–VHDX –ODX/UNMAP

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 PartitionVirtual Storage Stack

VHD VHD

Virtual Machine

vSCSI

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 PartitionVirtual Storage Stack

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 /

VHDX

Up To 64 TB

Larger Virtual Disks

Disk Sector Alignment

Large Sector Support

Enhanced Performance

Larger Block Sizes

Internal Log

Enhanced Resiliency

Embed Custom

Metadata

User Defined Metadata

512e RWM

512e Disk

Large Sector Support – 512e Disks

HardwareRMW

LegacyVHD

Unaligned F(Off)+512b

VHD

Aligned F(Off)+4 KB

No Auto Align For Existing VHDs

HardwareRMW

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

Large Sector Support – Native 4K Disks

VHDVHD

X

512 4K

SoftwareRMW

512

4K4K 4K

Native 4K Disk

VHDX

• 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

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

VHDX

External Storage Array

Offloaded Data Transfer (ODX)

Intelligent SAN

Virtual Disk Virtual Disk

Offload Read Token Token Offload Write

Token

Actual Data Transfer

High To Continuous Availability

• Online Virtual Disk Merge• Storage Live Migration• Shared Nothing Live Migration• Online Set Parent• Online resize of VHDX

Storage Demos

Hyper-V Networking

– Live Migration• Compression• SMB Multichannel & SMB Direct

–DVMQ– vRSS

Tips for optimal live migrations

1. Set optimal performance option2. Bigger Pipes3. Use jumbo frames4. Optimize power settings5. Tweak # of simultaneous live

migrations

Live Migration Performance Options

• TCP/IP (what we had)• Compression• SMB– SMB MultiChannel– SMB Direct

• iWarp• RoCE• Infiniband

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

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

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

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

Network Demos

You can have your cookie & eat it to!

Didier Van HoyeTechnical Architect – FGIAMicrosoft MVP, MEET Member, DELL TechCenter Rockstar http://workinghardinit.wordpress.com @workinghardinit

And take home the Lumia 1320

Present your feedback form when you exit the last session & go for the drink

Give Me Feedback

Follow TechNet Belgium@technetbelux

Subscribe to the TechNet newsletteraka.ms/benews

Be the first to know

Belgiums’ biggest IT PRO Conference