FOREWORD

Virtualization is cool. I've always had a soft spot for virtualization, since as a lifelong sysadmin I get pretty tired of the endless fine-tuning that goes into building a successful network "host." Especially when that fine-tuning evolves into upgrades involving screwdrivers, recabling, and dust.

While Xen wasn't the first serious virtualization platform, it was the first serious open source virtualization platform, so it was the first that I was willing to invest my time in learning about, and the first I'd consider basing any production-level systems on. Open source isn't just a preference for me—I dislike lock-in, so I hardly ever buy or deploy or depend on something that I couldn't replace with a different product offered by a competing ...

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