[Enterprise Open Source Magazine] Virtualization Comes in More than One Flavor
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When you think about virtualization, you probably think about VMware, or maybe Xen, and hopefully, even OpenVZ. With all the buzz surrounding this space, I thought it time to discuss three of the four different types of virtualization: emulation, paravirtualization, operating system-level virtualization, and multi-server (cluster) virtualization. The last is outside the scope of this article.
Each virtualization type has pros and cons that impact its appropriate application.
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Operating system-level virtualization enables multiple isolated execution environments in a single operating system kernel. It has the best possible (i.e., close to native) performance and density, and features dynamic resource management. On the other hand, this technology can't run different kernels from different operating systems at the same time. Examples: FreeBSD Jail, Solaris Zones/Containers, Linux-VServer, OpenVZ, Virtuozzo.
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Read the full article at opensource.sys-con.com.
