Linked by Eugenia Loli on Tue 18th Apr 2006 19:27 UTC, submitted by Jeremy Andrews
OSNews, Generic OSes Andrey Savochkin leads the development of the kernel portion of OpenVZ, an operating system-level server virtualization solution. In an interview on KernelTrap, Andrey offers a thorough explanation of what virtualization is and how it works. He also discusses the differences between hardware-level and operating system-level virtualization, going on to compare OpenVZ to VServer, Xen and UserMode Linux.
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Where would parallels (or whatever they're called) fit?

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alcibiades Member since:

I think Parallels is a virtual hardware system - an alternative to the VMWare workstation product. There seems to be one host OS, and then the different guest OSs each think they are running on dedicated hardware.

The thing I still feel puzzled about is the relation between virtualisation and multi user systems. I do understand that when you do remote log in, and share the host computer between different stations, as with ltsp or xdmcp etc, that there is no direct relation with virtualisation. But sometimes you find people suggesting you should combine the two - the users doing remote logins should be given their own virtual machines.

Now, when is it a good idea to do this, and when should you just have a non virtualised system with multiple concurrent users? Is it a matter of security only? Or are there performance considerations too? Is virtualisation something you would do if you also wanted to run a server on the same machine that is running the multiple user sessions, for instance?

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