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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