Feeds

Virtualisation for Beginners

It's not just for server jockeys, you know

  • alert
  • submit to reddit

Boost IT visibility and business value

Hands On VMWare engineer Shawn Morel opens an entertaining and highly recommended seminar on the internal workings of his company's Fusion product for the Mac by dividing up an area of space with a couple of vertical lines. He points in turn to the three segments this creates: "You've got Userland, the Kernel space and Hyperspace."

He adds a few more scribbles.

"And then you've got all these little things running around here, and you can have one or more VMXs, and you've got the kernel module and you've got this thing called the VMM, and it's all very complicated and it all sort of works like magic."

And then he puts up the Q&A slide.

Virtualisation for Beginners

...it's all very complicated and it all sort of works like magic

The joke gets a huge laugh from the audience of developers. But, of course, he's right. Virtualisation is very complicated. And it does work like magic. But knowing a little bit about how the magic works can throw useful light on how you can make it work for you.

As Morel says later, in what turns out to be a pretty full discussion of the technicalities: "A lot of people on OS X don't really realise the benefits of virtualisation. They'll go, 'Oh, sweet, I can run that Windows app that I couldn't run before.' The rest of the industry is like, 'Oh great, I've got isolation, I've got disaster recovery and fault tolerance, and I can consolidate my servers."

His point is that all those enterprise-class benefits of virtualisation are there for the individual desktop user too. Nothing that happens inside a virtual machine can damage or change anything in the host operating system, or in any other virtual machine that might also be running.

Virtualisation for Beginners

A single-core Parallels Win XP VM under Mac OS X. The decoder is running at around 40f/s, pulling in frames from the Avisynth frameserver fed from a demuxed MPEG2 file

His remarks don't just apply to Mac users. Any operating system disaster happening inside a virtual machine running under any other operating system is transient, because you can simply close down the virtual machine and start it up again, without affecting the rest of the system. If - and Windows users will be familiar with this - the causes of the disaster survive a reboot, perhaps because the recent installation of the new app has messed everything up, there's no need for an intricate repair process. Just throw the whole VM away and go back to the last working snapshot.

Boost IT visibility and business value

More from The Register

next story
NO MORE ALL CAPS and other pleasures of Visual Studio 14
Unpicking a packed preview that breaks down ASP.NET
KDE releases ice-cream coloured Plasma 5 just in time for summer
Melty but refreshing - popular rival to Mint's Cinnamon's still a work in progress
Leaked Windows Phone 8.1 Update specs tease details of Nokia's next mobes
New screen sizes, dual SIMs, voice over LTE, and more
Secure microkernel that uses maths to be 'bug free' goes open source
Hacker-repelling, drone-protecting code will soon be yours to tweak as you see fit
Mozilla keeps its Beard, hopes anti-gay marriage troubles are now over
Plenty on new CEO's todo list – starting with Firefox's slipping grasp
Apple: We'll unleash OS X Yosemite beta on the MASSES on 24 July
Starting today, regular fanbois will be guinea pigs, it tells Reg
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Boost IT visibility and business value
How building a great service catalog relieves pressure points and demonstrates the value of IT service management.
Why and how to choose the right cloud vendor
The benefits of cloud-based storage in your processes. Eliminate onsite, disk-based backup and archiving in favor of cloud-based data protection.