James Gosling: on the Java Road: "To get the best CPU utilization the apps have to be written to be multithreaded on a cluster node, and use MPI between nodes. This is the worst of both worlds because you have to architect for threading and clustering at the same time. This is pretty straightforward in the Java world because we have great threading facilities, but folks with bags of Fortran code have trouble (auto-parallelizing matrix code doesn't help nearly enough).
This is (almost) a non-issue for folks writing enterprise applications using the JavaEE frameworks because the containers deal with both threading and clustering"
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