Parallel Virtual Machines (PVM) were once a popular parallel programming platform for this, but lately MPI has become the DE facto standard for writing parallel programs for clusters.
In the development environment the developers will use either the standardparallel development paradigm that UCM provides (or the serial line development model).
在开发环境下，开发者使用UCM提供的标准的并行开发规范(或者连续开发模型)。
3
Only in a flat universe does space obey all the standard geometry-class rules-the angles of a triangle add up to exactly 180 degrees and parallel lines never meet.