The devilish details of desktop virtualization

Early adopters of virtual desktop infrastructure report compelling benefits, significant hurdles, and a cloudy view into ROI

Sweeping infrastructure upgrades

Wilson's infrastructure upgrades included a retooling of his network's points of failure. He used to have two T1 lines at every location, yet twice a year, AT&T would go dark and take out both of them. This wouldn't work in a virtual desktop environment, where "our base assumption is that you will always be connected," Wilson says. "Generally speaking, if you aren't connected, there's very little you can do anyway. Maybe you can write a Word document or work on an Excel spreadsheet, but even then you'll likely need to connect to a file server."

And so Wilson replaced a dedicated T1 line with cable or DSL (depending on the location) and added a Cisco router. Now he says he has three levels of redundancy on different technologies. Also, Wilson added 10 quad-core Dell servers running Citrix XenApp (formerly Presentation Server).

Lifetime installed a powerful MPLS (multiprotocol label switching) mesh network to accommodate the fast transfer of images its engineers needed to work on over thin clients. "Since virtual desktops are mostly used for WAN applications, make sure that your bandwidth and, more importantly, your latency are as low as possible," advises John Bowden, CIO at Lifetime.

Fast storage is another important factor for reducing latency. Fortunately for Natixis, the company had just bought high-end storage from EMC for its SAN. "Reliable, fast storage is key," says Florent Soland, manager of Windows services and virtualization at Natixis. "If you don't have it, it's going to take a lot more time to provision a workstation, and the end-user performance will be very bad."

Infrastructure upgrades throw a monkey wrench into the ROI that desktop virtualization was sold on. Add up the expense of new SAN storage, servers, virtualization software, a connection broker, and thin clients, among other costs, says Soland, "and it's more expensive to roll out 100 workstations in a virtual desktop infrastructure than 100 desktop workstations today -- we're still not there yet."

Au contraire, says Wilson. The reason ROI suffers, he says, is that most companies transition only a part of their workforce to virtual desktops. Indeed, Natixis plans to move 80 percent of its workforce to virtual desktops over the next couple of years. Lifetime's target is only 20 percent. This means they must support two computing models, contends Wilson.

"If you do this piecemeal, then you're only adding another layer and making the stack deeper and more complex," Wilson says. "The key is to deploy this strategically across the board." (To be fair, Natixis cites desktop virtualization concerns, such as licensing and apps that don't work well on virtual desktops, as barriers to a wholesale transition.)

Join the PC World newsletter!

Error: Please check your email address.

Tags virtualisation

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Tom Kaneshige

Show Comments

Most Popular Reviews

Latest News Articles


PCW Evaluation Team

Azadeh Williams

HP OfficeJet Pro 8730

A smarter way to print for busy small business owners, combining speedy printing with scanning and copying, making it easier to produce high quality documents and images at a touch of a button.

Andrew Grant

HP OfficeJet Pro 8730

I've had a multifunction printer in the office going on 10 years now. It was a neat bit of kit back in the day -- print, copy, scan, fax -- when printing over WiFi felt a bit like magic. It’s seen better days though and an upgrade’s well overdue. This HP OfficeJet Pro 8730 looks like it ticks all the same boxes: print, copy, scan, and fax. (Really? Does anyone fax anything any more? I guess it's good to know the facility’s there, just in case.) Printing over WiFi is more-or- less standard these days.

Ed Dawson

HP OfficeJet Pro 8730

As a freelance writer who is always on the go, I like my technology to be both efficient and effective so I can do my job well. The HP OfficeJet Pro 8730 Inkjet Printer ticks all the boxes in terms of form factor, performance and user interface.

Michael Hargreaves

Windows 10 for Business / Dell XPS 13

I’d happily recommend this touchscreen laptop and Windows 10 as a great way to get serious work done at a desk or on the road.

Aysha Strobbe

Windows 10 / HP Spectre x360

Ultimately, I think the Windows 10 environment is excellent for me as it caters for so many different uses. The inclusion of the Xbox app is also great for when you need some downtime too!

Mark Escubio

Windows 10 / Lenovo Yoga 910

For me, the Xbox Play Anywhere is a great new feature as it allows you to play your current Xbox games with higher resolutions and better graphics without forking out extra cash for another copy. Although available titles are still scarce, but I’m sure it will grow in time.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?