There has been a significant amount of derision heaped on Xen after its
successful integration into the Linux kernel last month.
One wouldn't think such criticism is warranted, since the inclusion of Xen in
the Linux kernel puts it on equal footing with KVM.
Yet, when Oracle's Wim Coekaerts announced the inclusion of Xen code for DomO
and DomU support in Linux, many industry observers took the opportunity to
lambaste Xen for being too-little-too-late.
True, KVM has been more successful in the briefer time it has existed. Xen
has had plenty of opportunity to be the go-to virtualization platform for
Linux. KVM, however, exploded in popularity and was fully integrated into the
Linux kernel by the time Linux 2.6.20 was released. It's now the
virtualization platform of choice for Red Hat Enterprise Linux, Canonical's
Ubuntu Server, and SUSE Enterprise Server Linux (though... (more)
The more things change, the more they stay the same. That is certainly true
of anti-open source virtualization FUD (fear, uncertainty and doubt). Linux
virtualization is robust and enterprise-worthy, and is evolving rapidly. It
is a threat to the established giants of virtualization.
And, so the same old FUD is spread around: Open source virtualization
software is free, like a free puppy. It's unpolished and lacking important
features. It's communists and hippies. It is only for elite hackers who can
code in a dozen languages and who love the command line. Linux virtualization
a... (more)