Articles | Volume 15, issue 2
Development and technical paper
18 Jan 2022
Development and technical paper |  | 18 Jan 2022

Evaluation and optimisation of the I/O scalability for the next generation of Earth system models: IFS CY43R3 and XIOS 2.0 integration as a case study

Xavier Yepes-Arbós, Gijs van den Oord, Mario C. Acosta, and Glenn D. Carver

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The EC-Earth3 Earth system model for the Coupled Model Intercomparison Project 6
Ralf Döscher, Mario Acosta, Andrea Alessandri, Peter Anthoni, Thomas Arsouze, Tommi Bergman, Raffaele Bernardello, Souhail Boussetta, Louis-Philippe Caron, Glenn Carver, Miguel Castrillo, Franco Catalano, Ivana Cvijanovic, Paolo Davini, Evelien Dekker, Francisco J. Doblas-Reyes, David Docquier, Pablo Echevarria, Uwe Fladrich, Ramon Fuentes-Franco, Matthias Gröger, Jost v. Hardenberg, Jenny Hieronymus, M. Pasha Karami, Jukka-Pekka Keskinen, Torben Koenigk, Risto Makkonen, François Massonnet, Martin Ménégoz, Paul A. Miller, Eduardo Moreno-Chamarro, Lars Nieradzik, Twan van Noije, Paul Nolan, Declan O'Donnell, Pirkka Ollinaho, Gijs van den Oord, Pablo Ortega, Oriol Tintó Prims, Arthur Ramos, Thomas Reerink, Clement Rousset, Yohan Ruprich-Robert, Philippe Le Sager, Torben Schmith, Roland Schrödner, Federico Serva, Valentina Sicardi, Marianne Sloth Madsen, Benjamin Smith, Tian Tian, Etienne Tourigny, Petteri Uotila, Martin Vancoppenolle, Shiyu Wang, David Wårlind, Ulrika Willén, Klaus Wyser, Shuting Yang, Xavier Yepes-Arbós, and Qiong Zhang
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Cited articles

Barros, S., Dent, D., Isaksen, L., Robinson, G., Mozdzynski, G., and Wollenweber, F.: The IFS model: A parallel production weather code, Parallel Comput., 21, 1621–1638,, 1995. a, b
Chassignet, E. P. and Marshall, D. P.: Gulf Stream Separation in Numerical Ocean Models, Geophys. Monogr. Ser., 177, 39–61,, 2008. a
Demory, M.-E., Vidale, P. L., Roberts, M. J., Berrisford, P., Strachan, J., Schiemann, R., and Mizielinski, M. S.: The role of horizontal resolution in simulating drivers of the global hydrological cycle, Clim. Dynam., 42, 2201–2225,, 2013. a
Dorier, M., Antoniu, G., Cappello, F., Snir, M., and Orf, L.: Damaris: How to Efficiently Leverage Multicore Parallelism to Achieve Scalable, Jitter-free I/O, in: 2012 IEEE International Conference on Cluster Computing, 24–28 September 2012, Beijing, China, IEEE, 155–163,, 2012. a
ECMWF: IFS Documentation CY43R3 – Part VI: Technical and computational procedures, in: IFS Documentation CY43R3, chap. 6, ECMWF, 1–227,, 2017a. a, b
Short summary
Climate prediction models produce a large volume of simulated data that sometimes might not be efficiently managed. In this paper we present an approach to address this issue by reducing the computing time and storage space. As a case study, we analyse the output writing process of the ECMWF atmospheric model called IFS, and we integrate into it a data writing tool called XIOS. The results suggest that the integration between the two components achieves an adequate computational performance.