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| Titel |
A fast input/output library for high-resolution climate models |
| VerfasserIn |
X. M. Huang, W. C. Wang, H. H. Fu, G. W. Yang, B. Wang, C. Zhang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1991-959X
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| Digitales Dokument |
URL |
| Erschienen |
In: Geoscientific Model Development ; 7, no. 1 ; Nr. 7, no. 1 (2014-01-14), S.93-103 |
| Datensatznummer |
250115532
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| Publikation (Nr.) |
 copernicus.org/gmd-7-93-2014.pdf |
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| Zusammenfassung |
| We describe the design and implementation of climate fast input/output
(CFIO), a fast input/output (I/O) library for high-resolution climate models.
CFIO provides a simple method for modelers to overlap the I/O phase with the
computing phase automatically, so as to shorten the running time of numerical
simulations. To minimize the code modifications required for porting, CFIO
provides similar interfaces and features to parallel Network Common Data Form
(PnetCDF), which is one of the most widely used I/O libraries in climate
models. We deployed CFIO in three high-resolution climate models, including
two ocean models (POP and LICOM) and one sea ice model (CICE). The
experimental results show that CFIO improves the performance of climate
models significantly versus the original serial I/O approach. When running
with CFIO at 0.1° resolution with about 1000 CPU cores, we managed
to reduce the running time by factors of 7.9, 4.6 and 2.0 for POP, CICE, and
LICOM, respectively. We also compared the performance of CFIO against two
existing libraries, PnetCDF and parallel I/O (PIO), in different scenarios.
For scenarios with both data output and computations, CFIO decreases the I/O
overhead compared to PnetCDF and PIO. |
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