...like Btrfs or do i use the market-available ZFS for example? Can i use DTrace or is there a need to develop your own tracingframework integrating application and the operating system? Can i use the same operating system from 1 proc to 256 procs...
http://www.c0t0d0s0.org/archives/5741-Vaughan-Nichols-about-OpenSolaris.html
...PowerTOP application is built upon the DTrace dynamic tracingframework, providing unprecedented, low (or nil) performance... DTrace DTrace is a comprehensive dynamic tracingframework for the Solaris Operating Environment. DTrace...
http://www.intel.com/sunalliance/pdf/solaris_on_xeon.pdf