rocks and oscar

seems oscar and rocks follow similar logic. oscar seems a little rougher
but also includes some stuff from major compute centers like oakridge and
ncsa. both are based on redhat-ish distros. they do use similar
approaches to build images, though oscar seems to do more custom building.
seems it takes system rpms and installs them at a different base for the
nodes. both install systems on the nodes and don't share a common central
system. this is fine but does have an install overhead. this is kinda
expensive (i think) for a desktop machine since their likely to have a lot
of software. also from a traditional cluster view, you could switch
between different configs faster if they were just nfs machine references.