Parallel I/O for 3-D Global FDTD Earth–Ionosphere Waveguide Models at Resolutions on the Order of ~1 km and Higher Using HDF5
Parallel I/O for 3-D Global FDTD Earth–Ionosphere Waveguide Models at Resolutions on the Order of ~1 km and Higher Using HDF5
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DOI：
10.1109/tap.2018.2835163
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发表时间：
2018-05
影响因子：
5.7
通讯作者：
S. Pokhrel;Miguel Rodriguez;A. Samimi;G. Heber;J. Simpson
中科院分区：
文献类型：
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作者：
S. Pokhrel;Miguel Rodriguez;A. Samimi;G. Heber;J. Simpson
3-D finite-difference time-domain (FDTD) models of the global Earth–ionosphere waveguide have reached grid resolutions on the order of $1\times 1 \times 1$ km and higher. At these high resolutions, efficient parallel input–output （i/o）需要方案才能使模拟运行时间合理。随着两极的接近，应用了分层数据格式5（HDF5），并针对全局纬度 - 频率fdtd模型进行了优化。此处介绍的方法可以简单地简化为基于笛卡尔的网格。
3-D finite-difference time-domain (FDTD) models of the global Earth–ionosphere waveguide have reached grid resolutions on the order of $1\times 1 \times 1$ km and higher. At these high resolutions, efficient parallel input–output (I/O) schemes are required to keep the simulation run times reasonable. However, generating optimal parallel I/O schemes is challenging due to the spherical-coordinate global mesh that includes merging of cells in the east–west direction as either pole is approached. Hierarchical Data Format 5 (HDF5) is applied and optimized for a global latitude–longitude FDTD model. The performance of the parallel HDF5 approach is compared with a message passing interface-based approach and a brute-force approach. The methodology presented here may be simplified to Cartesian-based grids in a straightforward manner.