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Parallels Virtuozzo Containers review, Part 2

Gearhead By Mark Gibbs , Network World , 03/26/2008
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About seven Internet years ago (that’s roughly three weeks in the real world) I started discussing Parallels Virtuozzo Containers 4.0, an operating system virtualization product.

I got distracted (as is my wont), but now I shall continue where I left off, which was . . . oh yeah: I had the system running and launched the Parallels Management Console and created containers (virtualized operating system instances) from templates.

Templates are installed on the host operating system and provide predefined configurations of registry settings and applications to be used when creating a new instance of a container. What is really cool is that all of the settings and features of a container are shared by all instances that are based on the same template. This saves a lot of disk space and allows containers to be managed and reconfigured as groups based on the templates they were created from.

Template operating system parameters include CPU minimum, maximum, number of CPUs that can be allocated, disk space limitation, maximum memory use, maximum number of processes and kernel-level threads, maximum number of Remote Desktop Protocol sessions, default DNS and search domains, which virtual network adapters to use, offline services, traffic shaping, whether the container should run automatically on boot and so on.

This level of detail means you can create very closely constrained operating system environments and, not only can you fine tune the configuration of your virtual production servers, but testing your server configurations in marginal environments will be much easier.

Now, while being able to template operating system configurations is great, even better is the ability to template applications – in other words create a package of applications that can be added to a container without having to perform the installation process! This allows you to create a template for one or more applications and then apply it along with other application templates to a container defined by an operating system template.

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But what about the futureBy Anonymous on April 12, 2008, 3:25 amWhile I love the architecture of virtuozzo, the most disconcerting thing is that there's no way to go back. With VMWare, you can do physical to virtual, virtual...

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You really do get your money's worthBy Anonymous on March 26, 2008, 5:10 pmI agree completely. Parallels is doing everything VMWare does just as good... if not better, and for a fraction of the cost. I expect big things from Parallels this...

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