DiRong1.0: a distributed implementation for improving routing network generation in model coupling
<p>A fundamental functionality of model coupling in an Earth system model is to efficiently handle data transfer between component models. An approach of <span class="inline-formula"><i>M</i>×<i>N</i></span> communication following a routing networ...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2020-12-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/13/6253/2020/gmd-13-6253-2020.pdf |
| Summary: | <p>A fundamental functionality of model coupling in an Earth
system model is to efficiently handle data transfer between component
models. An approach of <span class="inline-formula"><i>M</i>×<i>N</i></span> communication following a routing network has been used widely used for data transfer, and routing network generation becomes a
major step required to initialize data transfer functionality. Some existing
coupling software such as the Model Coupling Toolkit (MCT) and the existing
versions of the Community Coupler (C-Coupler) employ a global implementation
of routing network generation that relies on gather–broadcast
communications, which can be very inefficient under a case of a large number
of processes. This is an important reason why the initialization cost of a
coupler increases with the number of processor cores. In this paper, we
propose a “distributed implementation for routing
network generation, version 1.0” (DiRong1.0), which does
not introduce any gather–broadcast communication. Empirical evaluations show
that DiRong1.0 is much more efficient than the global implementation.
DiRong1.0 has already been implemented in C-Coupler2, and we believe that
some other couplers can also benefit from it.</p> |
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| ISSN: | 1991-959X 1991-9603 |