Storage Architecture Considerations for Desktop Virtualization
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Transcript Storage Architecture Considerations for Desktop Virtualization
Preparing Your
Architecture for
Virtual Desktops:
Storage
Considerations
Dale Wickizer
Chief Technology Officer
U. S. Public Sector, NetApp, Inc.
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Desktop Virtualization – Why Now?
Policy
Desktop
Virtualization
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Virtual Desktops Vs Cloud 2.0
Both require a maniacal focus on endpoint
applications
Each can drive network bandwidth investments
that benefit the other
Inexpensive endpoint devices (e.g., iPhones,
Droids, iPads, Wyse Thin Clients)
– Change the way people interact with information
– Continue to drive exponential adoption of both
End user experience will determine the
success or failure of agency initiatives around
both
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Promises, Promises
(Blah, Blah…Cloud; Blah, Blah…ROI)
Of course, it promises to “cloudify” the desktop
Ease management …save money
Better security …
Solve world hunger …
Expect an ROI of 2-3 years (less, if already well along
the path of server, network, storage virtualization)
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The Real ROI Is Potentially Much Bigger
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Giving People Their Lives Back
That was in 2005! Over the next two decades, the Washington, DC,
metro area is expected to add nearly 1.7 million households — up 34%
That does NOT factor in all the construction (e.g., Mixing Bowl, Metro dig
in Vienna, Hot Lanes around the Beltway, new bridges, etc.)
Nor does it account for snowstorms :^)
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Giving People Their Money Back
In 2005: Region-wide, households spend an average of nearly
$13,000 on transportation per year
127 million hours of wasted time sitting in traffic
91 million gallons of wasted fuel
BELTWAY BURDEN - The Combined Cost of Housing and Transportation in the Greater Washington, DC, Metropolitan Area ULI Terwilliger Center for Housing, et al, 2009
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The Time Is Ripe For Telecommuting!
Assuming the 2005 numbers telecommuting
could save:
– $1,125 - $2,250 / yr / desktop* of lost productivity
– $6,500 - $13,000 / yr /desktop* in transportation cost
Including $137.57 / year /desktop in wasted fuel per driver
THIS IS MONEY IN YOUR POCKET over and
above the savings to the IT organization
Based on:
-
Median salary of $78,000 / household / year (2005)
Average transportation cost of $13,000 / household / year (2005)
2,116,667 people in 2005
60 hours / year /person in traffic in 2005
42.99 gallons /year / person in wasted fuel
$3.20 / gallon fuel cost
*Depending on whether “household” is defined as 1 or 2 people working per household.
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The Time Is Ripe For Telecommuting!
Assuming the 2005 numbers telecommuting
could save:
– $1,125 - $2,250 / yr / desktop* of lost productivity
– $6,500 - $13,000 / yr /desktop* in transportation cost
Including $137.57 / year /desktop in wasted fuel per driver
THIS IS MONEY IN YOUR POCKET over and
above the savings to the IT organization
Based on:
- Median salary of $78,000 / household / year (2005)
transportation
of $13,000
year brightest,
(2005)
As -theAverage
competition
heatscost
up to
hire the/ household
best and/ the
- 2,116,667
peoplemay
in 2005
offering
this service
provide a competitive edge to some
- 60 hours /over
year /person
organizations
others!in traffic in 2005
- 42.99 gallons /year / person in wasted fuel
- $3.20 / gallon fuel cost
*Depending on whether “household” is defined as 1 or 2 people working per household.
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Where We’re At Today
Notable Exceptions:
•US P&TO – 3000+ Teleworkers (operational 3-4 years)
•Military Health Organization – rolling out 55,000
desktops
•DIA – Rolling out 10,000+ desktops
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The Challenges
Major operational change – “Layer 8/9 Issue”
Input/Output (I/O) orders of magnitude higher than
server virtualization (SV)
– Mass deployments (think 10s or 100s of 1000s)
– “Herd I/O”, such as boot storms
“But it worked fine in the pilot…” – Need to invest!
Virtual desktops do NOT equal physical ones
– Don’t use P2V images – start fresh!
– Separate user data from apps and desktop images
– Turn off virus scanning and search/index tools
Storage Challenges
– “Bloat” & Backup/Restore Challenges – greater than SV
– I/O bottlenecks
– Cost
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A Lot of Moving Parts to Consider
Connection Broker
Connection
Agent
Connection
Agent
Connection
Agent
Connection
Agent
Connection
Agent
Management
Server
Hypervisor
Shared Storage
Physical Servers
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Storage Can Make or Break It!
“We caution organizations to lay out a complete data
management strategy as part of the plan because
the amount of storage (and how it’s backed up) can
dramatically affect the capital costs.”
- Gartner: “Total Cost of Ownership of PCs vs. Hosted Virtual Desktops”
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Desktop Virtualization Expenses
24%
41%
8%
8%
1%
Source: Gartner Dataquest
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I/O Is Heavily Dependent on User Types
and Desktop Virtualization Approach
Complexity
Knowledge Workers
Task Workers
Power Users
Mobile
Users
Terminal Services
VDI, Application Virtualization
VDI, Application Virt., Client Virt.
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I/O Is Heavily Dependent on User Types
and Desktop Virtualization Approach
Complexity
Task Workers
Knowledge Workers
4 IOPS
Repetitive tasks, fewer applications
Lower performance requirements
Lower storage needs
Limited user flexibility
Less complex
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8 IOPS
Power Users
12+ IOPS
Mobile
Users
20 IOPS
More applications
Higher performance required
Higher storage needs
More user flexibility
More complex
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Storage Impact on Desktop Performance
• Steady state traffic is generally
dominated by small block random
writes (50-80%)
• However, there can be frequent,
exponentially high small block random
reads, which can bring storage
controllers to their knees
Read data block
from disk
Disk
• It is important to size for both
performance (# of spindles) and
capacity
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Storage Challenges for Virtual Desktops
In addition to Storage costs and performance bottlenecks:
Maintaining high availability (no service interruption)
Security and control of user data (multi-tenancy on
steroids)
Lengthy mass deployment timeframes
Proper data protection requires separation of desktop
images, from applications, user profiles and user data
All of this requires careful thought and planning!
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Things To Expect From Your Storage
Your enterprise storage should support the following,
regardless of hypervisor or desktop client:
Redeploy thousands of patched images in minutes
Thin clones, thin provisioning and primary data dedupe to reduce
“bloat”
Write optimization and Intelligent caching (thin clone / dedupe
aware) to overcome I/O bottlenecks
High performance RAID - double disk failure protection with fewest
disks (RAID-10 too expensive)
Integrated data protection for images, applications, user profiles
and user data, without being a storage expert! Restore in minutes.
Thin, block level replication for DR to minimize network bandwidth
(providing more bandwidth for desktops)
Protect against failures, allow maintenance with minimal service
interruption
Scale easily to store user data as amount of rich media grows
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Things To Expect From Your Storage
Your enterprise storage should support the following,
regardless of hypervisor or desktop client:
Redeploy thousands of patched images in minutes
Thin clones, thin provisioning and primary data dedupe to reduce
“bloat”
Write optimization and Intelligent caching (thin clone / dedupe
aware) to overcome I/O bottlenecks
High performance RAID - double disk failure protection with fewest
disks (RAID-10 too expensive)
Integrated data protection for images, applications, user profiles
and user data, without being a storage expert! Restore in minutes.
Thin, block level replication for DR to minimize network bandwidth
(providing more bandwidth for desktops)
Protect against failures, allow maintenance with minimal service
interruption
Scale easily to store user data as amount of rich media grows
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Summary
There is a “perfect storm” of technology trends,
business drivers, excuses, needs, etc., that
make Desktop Virtualization compelling
The real potential ROI is an improvement in
the quality of life of the workforce (don’t let IT
gobble up all the benefit)
End user experience will be the measure of the
success or failure of any Desktop Virtualization
initiatives!
The storage you choose is directly related to
end user experience and will either make or
break your Desktop Virtualization projects
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Thank you!
Dale Wickizer
Chief Technology Officer
U. S. Public Sector, NetApp, Inc.
[email protected]
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