Well, I'm still not done with the hp-ux and solaris (yay, I got a solaris box to try out) parts of the LVM series part II, meanwhile I'ld like to share some thoughts about Xen.

For those who doesn't know what it is, Xen it's a paravirtualization technology, designed to create, manage and mantain virtual machines running on a real server. It has a really good performance (when running paravirtualized) and as everything free (as in freedom) is not as easy to use from scratch as it's propietary competitor ( namely VMWare)

There are Dom0 (the host real machine), and DomUs (the guest, virtualized machines). You need to have special kernels to run in paravirtualized virt machines and is not trivial to get the machines installed, however, there are quite a bunch of tutorials and howtos around to get you started if you are interested. I hope I'll be able at some stage to create a good documentation about how Xen works, at the time I'm still learning the technology. The documentation on the net is kind tricky and you have to read a lot of documentation to get started and understand what are you doing.