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August 10, 2007

Article after article and post after post have compared and contrasted Xen, VMWare, Veridian, and a host of other virtualization technologies, with opinions on performance, management tools, implementations, etc., etc. in abundant supply. Inevitably when it comes to Xen, the story comes full circle with some sort of declaration about “data center readiness.” The definition of “ready for the data center” is quite subjective, of course, based largely on the author’s personal experience, skills, and their opinion of the technical capabilities of those managing this vague “data center” to which they are referring.  More ...

Posted by Jim Klein | 0 comment(s) | Share This

June 08, 2007

For those who are wondering why I haven't posted lately, especially since the latest Xen releases, I'm now on the advisory boards for's SearchEnterpiseLinux and SearchServerVirtualization sections, and have been posting there on Linux and Xen. My two most recent posts are:


Xen 3.1, XenEnterprise and RHEL

Last week, XenSource released Xen 3.1 (formerly 3.0.5) to the community, offering significant new features and capabilities. There are a number of enhancements, but the most significant are More...

Fedora 7 Xen First Look

Having spent a few days with Fedora 7, I have found that, while still a bit buggy, the updated Xen tools show some real promise More...

You can quickly get to all my posts there, and subscribe to a feed of them, if you want, at

I may double post them down the road - we'll see how this new site goes. 

More ...

Keywords: Fedora, Linux, Red Hat, RHEL, Xen, Xensource

Posted by Jim Klein | 3 comment(s) | Share This

May 01, 2007

There is no question that virtualization has captured the attention of enterprises of all shapes and sizes. And it's easy to understand why - the benefits are simply undeniable. Who wouldn't be interested in lower TCO, better resource utilization, improved reliability, increased flexibility, and rapid deployment - among other gains?

One of the biggest newsmakers in virtualization has been the open source Xen project, and for good reason. The technology is very well designed, is extraordinarily fast and scalable, and is supported by EVERY major OS, server, and silicon vendor - even Microsoft. But as Xensource CTO Simon Crosby says, "the Xen hypervisor is an engine, and not a car.  A powerful engine that needs a great gearbox, shocks, tires and the body to go with it." More ...

Posted by Jim Klein | 12 comment(s) | Share This



Before you can have any sort of serious conversation about these two systems, you must first understand their underlying technologies, as well as their overall approach. At present, there are two primary approaches to virtualization: paravirtualization and full virtualization. I'll start with full virtualization, both because it came along first and because it's a little easier to understand. More ...

Keywords: Virtual Infrastructure, virtualization, VMWare, Windows virtualization, Xen, XenEnterprise, Xensource

Posted by Jim Klein | 9 comment(s) | Share This

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