Transcript Virtualization - Spiceworks Community

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A Discussion
* Used Since1960’s starting with IBM System/360
* Grown in acceptance and usage by non Mainframe
or “Big Iron” Environments only in recent years
* Early adopters of Virtualization in smaller
environments used primarily for testing and
development purposes initially.
* X86 Virtualization not available until 1999 When
VMWare launched VMWare Virtual Platform
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* Virtualization Actually Creates a underlying
Hardware platform to run an Operating System
on.
* Emulation mimics another platform on a nonnative platform
* Virtualization uses emulation
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* Better hardware efficiency
* Security
* Stability
* Cost Effective*
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* Mainframe
* Servers (X86, PowerPC, Sparc, etc…)
* Workstations, Desktops, Laptops (X86)
* Mobile (Smart phones, etc…)
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* Type I
* Type II
* Type 0?
* Application
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* Hypervisor runs directly on underlying
hardware and all Operating Systems run on top
of it, including any “Control” Operating
systems with special permissions.
* Usually Micro Kernel based
* Typically includes: ESX, Hyper-V, XEN,
KVM(Macro Kernel)
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* Hypervisor runs on top of an existing host
Operating System as a standard application
process.
* Traditionally all Hardware Emulated
* Typically includes: VMWare Workstation, GSX,
VMWare Player, VirtualBox, Parralells
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* An unmanaged Hypervisor
* Really nothing more than a subset of Type I
(Which doesn’t really exist)
* The more you know, the more it looks like
something from the marketing department
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* Really more like sandboxing an application
than the other types of emulation listed
* Less common, but becoming more so
* Example Portable Apps
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* Faster
* Designed to be more secure
* Generally better centralized management tools
for scaling
* Headless
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* Runs in user space
* Slower due to hardware emulation
* More likely to cause host system instability
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