With a simple twist when compiling the kernel all the CPUs on the 10/100 network become nodes on the cluster, and the POS client application runs as a single image supercomputer. That's what openmosix does. It delivers a feature that Novell, for instance, sells for $10k, assuming you already have severak certain other licenses. It's a feature that Microsoft also is attempting to play catch up on, of course. Check out this Microsoft effort to try to keep up with what openmosix does ...

"Microsoft will sell a version of Windows for high-performance computing -- a niche in which rival Linux is blossoming -- with a first version planned for the second half of 2005.
[link|http://news.zdnet.co.uk/software/windows/0,39020396,39158501,00.htm|http://news.zdnet.co...6,39158501,00.htm]