High Performance Linux Clusters: With OSCAR, Rocks, openMosix, and MPITo the outside world, a supercomputer appears to be a single system. In fact, it's a cluster of computers that share a local area network and have the ability to work together on a single problem as a team. Many businesses used to consider supercomputing beyond the reach of their budgets, but new Linux applications have made high performance clusters more affordable than ever. These days, the promise of low cost supercomputing is one of the main