Performance and results of the high-resolution biogeochemical model PELAGOS025 v1.0 within NEMO v3.4

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dc.contributor.authorEpicoco, Italo
dc.contributor.authorMocavero, Silvia
dc.contributor.authorMacchia, Francesca
dc.contributor.authorVichi, Marcello
dc.contributor.authorLovato, Tomas
dc.contributor.authorMasina, Simona
dc.contributor.authorAloisio, Giovanni
dc.date.accessioned2021-10-08T07:04:09Z
dc.date.available2021-10-08T07:04:09Z
dc.date.issued2016
dc.description.abstractThe present work aims at evaluating the scalability performance of a high-resolution global ocean biogeochemistry model (PELAGOS025) on massive parallel architectures and the benefits in terms of the time-to-solution reduction. PELAGOS025 is an on-line coupling between the Nucleus for the European Modelling of the Ocean (NEMO) physical ocean model and the Biogeochemical Flux Model (BFM) biogeochemical model. Both the models use a parallel domain decomposition along the horizontal dimension. The parallelisation is based on the message passing paradigm. The performance analysis has been done on two parallel architectures, an IBM BlueGene/Q at ALCF (Argonne Leadership Computing Facilities) and an IBM iDataPlex with Sandy Bridge processors at the CMCC (Euro Mediterranean Center on Climate Change). The outcome of the analysis demonstrated that the lack of scalability is due to several factors such as the I/O operations, the memory contention, the load unbalancing due to the memory structure of the BFM component and, for the BlueGene/Q, the absence of a hybrid parallelisation approach.
dc.identifier.apacitationEpicoco, I., Mocavero, S., Macchia, F., Vichi, M., Lovato, T., Masina, S., & Aloisio, G. (2016). Performance and results of the high-resolution biogeochemical model PELAGOS025 v1.0 within NEMO v3.4. <i>Geoscientific Model Development</i>, 9(6), 2115 - 2128. http://hdl.handle.net/11427/34437en_ZA
dc.identifier.chicagocitationEpicoco, Italo, Silvia Mocavero, Francesca Macchia, Marcello Vichi, Tomas Lovato, Simona Masina, and Giovanni Aloisio "Performance and results of the high-resolution biogeochemical model PELAGOS025 v1.0 within NEMO v3.4." <i>Geoscientific Model Development</i> 9, 6. (2016): 2115 - 2128. http://hdl.handle.net/11427/34437en_ZA
dc.identifier.citationEpicoco, I., Mocavero, S., Macchia, F., Vichi, M., Lovato, T., Masina, S. & Aloisio, G. 2016. Performance and results of the high-resolution biogeochemical model PELAGOS025 v1.0 within NEMO v3.4. <i>Geoscientific Model Development.</i> 9(6):2115 - 2128. http://hdl.handle.net/11427/34437en_ZA
dc.identifier.issn1991-959X
dc.identifier.issn1991-9603
dc.identifier.ris TY - Journal Article AU - Epicoco, Italo AU - Mocavero, Silvia AU - Macchia, Francesca AU - Vichi, Marcello AU - Lovato, Tomas AU - Masina, Simona AU - Aloisio, Giovanni AB - The present work aims at evaluating the scalability performance of a high-resolution global ocean biogeochemistry model (PELAGOS025) on massive parallel architectures and the benefits in terms of the time-to-solution reduction. PELAGOS025 is an on-line coupling between the Nucleus for the European Modelling of the Ocean (NEMO) physical ocean model and the Biogeochemical Flux Model (BFM) biogeochemical model. Both the models use a parallel domain decomposition along the horizontal dimension. The parallelisation is based on the message passing paradigm. The performance analysis has been done on two parallel architectures, an IBM BlueGene/Q at ALCF (Argonne Leadership Computing Facilities) and an IBM iDataPlex with Sandy Bridge processors at the CMCC (Euro Mediterranean Center on Climate Change). The outcome of the analysis demonstrated that the lack of scalability is due to several factors such as the I/O operations, the memory contention, the load unbalancing due to the memory structure of the BFM component and, for the BlueGene/Q, the absence of a hybrid parallelisation approach. DA - 2016 DB - OpenUCT DP - University of Cape Town IS - 6 J1 - Geoscientific Model Development LK - https://open.uct.ac.za PY - 2016 SM - 1991-959X SM - 1991-9603 T1 - Performance and results of the high-resolution biogeochemical model PELAGOS025 v1.0 within NEMO v3.4 TI - Performance and results of the high-resolution biogeochemical model PELAGOS025 v1.0 within NEMO v3.4 UR - http://hdl.handle.net/11427/34437 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34437
dc.identifier.vancouvercitationEpicoco I, Mocavero S, Macchia F, Vichi M, Lovato T, Masina S, et al. Performance and results of the high-resolution biogeochemical model PELAGOS025 v1.0 within NEMO v3.4. Geoscientific Model Development. 2016;9(6):2115 - 2128. http://hdl.handle.net/11427/34437.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Oceanography
dc.publisher.facultyFaculty of Science
dc.sourceGeoscientific Model Development
dc.source.journalissue6
dc.source.journalvolume9
dc.source.pagination2115 - 2128
dc.source.urihttps://dx.doi.org/10.5194/gmd-9-2115-2016
dc.subject.otherBurns
dc.subject.otherDisaster Planning
dc.subject.otherHumans
dc.subject.otherMass Casualty Incidents
dc.subject.otherNational Health Programs
dc.subject.otherPractice Guidelines as Topic
dc.subject.otherSocieties, Medical
dc.subject.otherSouth Africa
dc.titlePerformance and results of the high-resolution biogeochemical model PELAGOS025 v1.0 within NEMO v3.4
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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