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Virtual Desktop Infrastructure
PC/Thin Client/Lockdown PC
Remote office options
What is VDI?
The Physical World
Data security and
compliance are at risk.
One-off fixes are costly.
Desktop refresh is
complicated and slow.
Applications conflict and
The Virtual World
track and secure data.
Centrally fix and deliver patches
globally at a lower cost.
Rapidly update PCs
or operating systems.
Isolate applications to improve
performance and speed.
Hypervisor- Example • Runs directly on hardware
• Manages resource
• Strong fault and security
• Highly scalable architecture
• What’s available
• Microsoft Hyper V
• Xen Server
What is VDI?
Core appliance at
Edge appliance at
VDI User Experience
VDI Connection Broker
Generally a Windows Server VM(s)
Web Server component
Datastore containing VDI pool information
Authenticates against Active Directory
Communicates with VM Management Services
Passes Connection details back to User
Purchase price £399
Half day to install £105
◦ £35 per hour
Admin – 15 hours £525
Power usage £240
Per annum £352.25
Thin client £240
One hour to install £35
◦ £35 per hour
Power usage £20
Back Office £265,000 £530
Per annum £206.25
Cost per user model (500 users)
40.3% saving – payback 16 months
What made VDI produce such high savings
Storage was the most expensive part of VDI and priced the solution higher than
PC’s. Thin provisioning from Citrix, VMware or Netapp has cut storage costs by 80%
Green Computing Initiative
Needs of a mobilised workforce
HA/DR for Desktop estate
Smooth the transition to Windows 7
Power Savings with Client Consolidation
Client Consolidation uses much less power than traditional
◦ e.g. Assume 200 users
Traditional desktop power consumption:
◦ 200 users X avg 300 watts per PC = 60,000 watts
Client Consolidation power consumption:
◦ 3 x3850 = 6,000 watts + DS4700 = 1,000 watts + 200 Thin Clients x 5
watts = 7,000 + 1,000 = 8,000 watts
Cost savings is 260 watts per desktop
◦Estimated savings of £80 per PC per year!
◦ (assumes 10 pence per KW hour price for electricity).
Secure Client device – End Point security
Connection to data centre - SSL VPN / Firewall
Secure virtual desktop – Hypervisor AV
No real physical savings for laptop users - Yet
Laptops can be replicated to backup virtual machine
Laptop sometimes not needed (e.g. office to office)
User can work from any location
The Future :
◦ Client Hypervisor with Secure Partition
◦ Online and Offline Access
◦ Bare metal Performance
VDI and Remote Office Connectivity & Performance
- No IT staff at remote locations
- High speed access
- Data is protected
- “single instance of data”
- Less hardware, licenses, storage, tape
- None or less servers for branch office services
- Data is safe!!
Very first phase of deciding on VDI
Discovery Tool Kit
Collect detailed information on current estate
OS versions and patch levels, CPU make, model, speed, Physical memory size
Age of device
Total number of displays and maximum resolution
Total number of local disks, total capacity of storage available, total amount of
USB devices and peripherals (connected at scan)
• The installed applications discovered on the end point, Application usage
• The average and maximum memory used by each discovered application
• The peak and average CPU usage of each discovered application
Local storage usage – the amount of disk space broken down by application
VDI Solution Stack Summary
Thin Clients Wyse
WAN Optimisation Blue Coat
Copy of these slides
White paper on consolidation ratios
No cost trial login
Discovery tool to assess current estate
Proof of Concept options
How to approach VDI document