Virtual Computing: Still a Learning Experience

For a technology that's supposed to make computing easier, virtualization is becoming quite complicated. The Hewlett-Packard Technology Forum that starts Monday in Las Vegas will feature as many as 87 user training sessions on virtualization, more than any other category, organizers say. This is a recognition both that virtualization continues to gain in popularity but also that end users have a lot of questions.

The HP Technology Forum (HPTF) is expected to draw 7,000 attendees. It coincides with the HP Software Universe event expected to draw 3,000 people to Las Vegas, though to a different venue than the Technology Forum. Despite the appeal of virtualization as a way to use IT resources more efficiently, the technology adds a layer of complexity that IT managers may not be prepared for and may reduce the anticipated return on investment.

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News source: PCWorld

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DKAngel said,
i thort virtulization was just running another os in an os? how hard is that

as long as you don't confuse virtualization with emulation ...

Angel Blue01 said,

What's the difference? :ponder:

Emulation is when you well emulate an instruction... its not a native call to the processor, it goes through additional steps to wrap its call...

virtualization sends the instruction straight to the CPU and processes it with no wrapper technically... well there is a small one that says where it came from and where its going, but the big difference is that emulation it doesnt exactly execute the original instruction, it turns it into another instruction that the cpu executes the sends it to the emulator then the emulator translates it to the emulated OS... emulation is more complex and time consuming

neufuse said,

Emulation is when you well emulate an instruction... its not a native call to the processor, it goes through additional steps to wrap its call...

virtualization sends the instruction straight to the CPU and processes it with no wrapper technically... well there is a small one that says where it came from and where its going, but the big difference is that emulation it doesnt exactly execute the original instruction, it turns it into another instruction that the cpu executes the sends it to the emulator then the emulator translates it to the emulated OS... emulation is more complex and time consuming

In other words, emulation is when you mount a DVD basically. Virtualization is running another environment with another BIOS, another HDD, and its all virtual, you can configure how much memory the virtual pc uses, and if your using more than one CPU, you can configure it to which CPU it will use, virtualization's main priority is for running more than one OS, but has more abilities than that, you can mount a floppy disk whether it is physically in your physical PC, mounted via emulation on your physcial PC, or mounted from an image on the virtual PC, you can configure how it connects to the network/internet, and much more, to install an OS on the guest OS, you just mount the Windows installation DVD or whatever DVD you would use to install the OS and it will just run the install and install it straight to the virtual HDD. In easy words, emulation is just mounting an image, virtualization is just running a virtual PC with its own virtual HDD and everything. Two completely different things.

DKAngel said,
i thort virtulization was just running another os in an os? how hard is that

It doesn't have to be an OS, it can be a single application, or a virtualized appliance. Like a Linux-based hardware firewall that you can run on your Windows PC, or a portable, zero-installation version of Office or Photoshop, etc.