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PARALLEL COMPUTATION OF THE REGIONAL OCEAN MODELING SYSTEM

机译:区域海洋建模系统的并行计算

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摘要

The Regional Ocean Modeling System (ROMS) is a regional ocean general circulation modeling system solving the free surface, hydrostatic, primitive equations over varying topography. It is free software distributed worldwide for studying both complex coastal ocean problems and the basin-to-global scale ocean circulation. The original ROMS code could only be run on shared-memory systems. With the increasing need to simulate larger model domains with finer resolutions and on a variety of computer platforms, there is a need in the ocean-modeling community to have a ROMS code that can be run on any parallel computer ranging from 10 to hundreds of processors. Recently, we have explored parallelization for ROMS using the Message-Passing Interface (MPI) programming model. In this paper, we present an efficient parallelization strategy for such a large-scale scientific software package, based on an existing shared-memory computing model. In addition, we discuss scientific applications and data-performance issues on a couple of SGI systems, including Columbia, the world's third-fastest supercomputer.
机译:区域海洋建模系统(ROMS)是一种区域海洋通用环流建模系统,可解决变化地形上的自由表面,静水压力,原始方程。它是在全球范围内分发的免费软件,用于研究复杂的沿海海洋问题和盆地到全球范围的海洋环流。原始ROMS代码只能在共享内存系统上运行。随着越来越多的模拟更高分辨率的大型模型域以及在各种计算机平台上的需求不断增加,海洋建模社区中需要一种ROMS代码,该代码可以在10到数百个处理器之间的任何并行计算机上运行。最近,我们探索了使用消息传递接口(MPI)编程模型对ROMS进行并行化的方法。在本文中,我们基于现有的共享内存计算模型,为此类大型科学软件包提供了一种有效的并行化策略。此外,我们还讨论了两个SGI系统上的科学应用和数据性能问题,包括世界第三快的超级计算机Columbia。

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