Transcript Understanding Tim Mangan Kahuna: TMurgent Technologies LLP http://www.tmurgent.com Microsoft MVP for Application Virtualization President, Virtualization Boston http://www.virtg.com.

Understanding
Tim Mangan
Kahuna: TMurgent Technologies LLP
http://www.tmurgent.com
Microsoft MVP for Application Virtualization
President, Virtualization Boston http://www.virtg.com




Computational VS Perceived Performance
What Do Users Care About?
Measuring Perceived Performance
Virtual Environment Performance
Measurement of discrete components of a system
that affect overall performance.
Examples include:
 Processor time
 Bandwidth
 Queue lengths
 Counters of all kinds
A methodology where one analyzes the system
with a goal of improving user productivity by
focusing on issues that affect the performance as
perceived by the users.
Computational


Repeatable
Break down to directly
measurable components
Perceived


Variable
Measure “end to end”
Our systems today are too complex to rely on
computational performance (alone).
 Multi-system
 Networking
 Remote Protocols
 Virtualization Layering
Rethinking the Progress Bar1
Good:
Linear
Fast Power
Bad:
Any with variation
1 Harrison, Amento, Kuznetsov, & Bell
http://chrisharrison.net/projects/progressbars/ProgBarHarrison.pdf
1
http://www.projectvrc.nl




Independent framework to measure virtual
machine performance
Free
Set up your own tests
Understand their results
 Virtual Session Index
Office 2007 SP1
SWAP
2003 Space
versus(RAID5)
2008 x86
Add XenApp 5.0
2003 versus 2008 x64
Bare Metal vs VMs
Odd Results
TS versus Desktops
Virtual Desktops
Bare Metal vs VMs
Page Sharing






Disk I/O Subsystem very important
Scenarios were CPU oriented
I/O subsystem of Hyper-V was bottleneck
New results being published soon
Improved Test Methodologies
New Vendor Releases
New!

Nehalem Rocks for TS! 2x Improvement





Hyperthreading great (except ESX)
EPT-D Rocks (Hardware vs Software)
if ESX and EPT-D, turn vMMU software off,
if ESX and no EPT-D, turn vMMU software on
New version Hypervisors did not improve much
 Vsphere 4.0, Hyper-V 2.0, XenServer 5.5
 Hyper-V 2.0 improved more than others
 Xen & Hyper-V now almost identical, except that a single VM cannot
have 8CPU under Hyper-V (limit=4)
 Vsphere can be better/worse than others depending on scenario


Office 2007 SP2 fixes “outlook preview pane” performance
IE8 performs on par with IE7
Here are some links
most relevant to this
topic.
Project Virtual Reality Check:
http://www.projectvrc.nl
Perceived Performance:
http://www.tmurgent.com/WhitePapers/PerceivedPerformance.pdf
http://www.tmurgent.com/WhitePapers/PerceivedPerformance_VirtualOS.pdf
VDI versus TS (video):
http://www.brianmadden.com/blogs/videos/archive/2007/04/25/vdi-solutionsa-year-later-from-briforum-2007.aspx
http://www.brianmadden.com/blogs/videos/archive/2007/10/09/xen-versus-esx-aperformance-head-to-head-comparison-from-briforum-europe-2007.aspx
Citrix Logon and Logoff Chart:
http://www.brianmadden.com/blogs/gabeknuth/archive/2008/08/14/briforumvideo-the-excruciating-detail-of-the-xenapp-logon-process.aspx