Virtualization is the concept of extracting a system's resource.A virtual machine is a software implementation of a PC that shares the same hardware as the parent computer but acts as a different machine.VMware being the early leader of the concept has gained a decent amount of the market's share.Microsoft's HyperV and Citrix's Xen came into the concept later but has better hopes.the tables shows up the pro's on con's of each of them.Choose the one that suits ur needs.
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Microsoft’s HyperV
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VMware
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Citrix’s Xen
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| Supported Operating System |
Windows & SUSE Linux |
Windows, Mac, Linux & others |
Windows, Linux |
| Management Tools |
System center VM manager |
vCenter Server, vMotion, vCenter Lab Manager, vCenter Converter Infrastructure |
Included only in paid version |
| Free hypervisor |
HyperV Server |
ESXi |
Xen Server Express |
| Paid hypervisor |
--- |
ESX |
Xen Server Enterprise, Platinum |
| Advantage |
- Its included as a part of Windows Server 2008
- Cost effective licensing of guest Windows VMs
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- Widest selection of pre-built appliances
- Widest selection of guest OS support
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- Open Source solution
- Essentials also manages HyperV
- 32 CPU support
- P2V included in overall solution
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| Disadvantage |
Limited management tools |
Confusing array of pricing and configuration options |
No pre-built appliances |
As the days progress, we are at the advent of new technologies in the same computer technology. You are being served in a way with which you will surely be fully satisfied. Do you have any requirement of the following sort? Want to use different operating systems in a concurrent manner? Want it to run in a same hardware? The only best solution is to go for the free licensed Xen. Xen is a virtual machine monitor which allows the client to have different operating systems getting operated in a same hardware. They share all the available resources. Hypervisors provide the full functionality of the hardware virtualization. This makes the unmodified operating system to run in a particular system. The new adventurous technology in Java involves JVM to run directly on the hypervisor para-virtualization API. This literally means that we don’t want traditional operating system layer any more in the line. This increases dynamicity in the use of operating systems. Here is the chance for you to check your product compatibility in different environments using the concept of virtualization.

Ubuntu
Ubuntu 9.10 Operating System is the next version of Ubuntu going to get released soon.This version is code-named "Karmic Koala" .The ubuntu 9.10 beta version is already released for the testing purpose. Downloading and Upgrading to a new version of Ubuntu would be very easy this time. One of the finest feature of this operating system is that it runs flawless even on a 10 year old laptop. This version comes with cloud storage to the masses with simple and well integrated platform. The Ubuntu Software Centre is specially designed in this version to ease out adding and removing other open source projects.This version of ubuntu comes packed with the necessary drivers putting a full stop to the user's driver search.In this version, the developers have given importance to the areas like boot-up management, application security etc.. and had much less focus on other sludgy works.Comes with a new IM, not the same old pidgin.This version has an option to make a complete test on the hardware sources at the installation.This decides the suitable drivers for your hardware.Soon,will come up with the full release details of the Ubuntu Karmic Koala.Its due for release by Oct 8th '09.