InfoWorld published a brief review of SWsoft Virtuozzo for Linux 3.0, giving it a score of 9.3 (Excellent) and writing this bottom line:
SWsoft really has its ducks in a row with Virtuozzo for Linux 3.0. It’s a well-designed and well-implemented virtualization solution that comes at a surprisingly low cost. Because it’s not true hardware virtualization and relies heavily on the host OS, it’s not for everyone, but it’s an outstanding choice for companies such as hosting providers and large infrastructures.
There is a point particularly interesting to me. The author, Paul Venezia, claims Virtuozzo has a much lower overhead than VMWare solution:
…
SWSoft’s approach to server virtualization has some definite benefits over VMWare?s. Among them, it requires much less overhead, so more virtual servers can be run from a single server without noticeable performance degradation…
But there are no traces of benckmarks or even a detail about VMware platform used for comparison, so beware of such affirmations.
Read the whole review at source.
If you are interested in Virtuozzo you could read the virtualization.info Review of SWsoft Virtuozzo for Windows 3.5.1.