Changes between Version 73 and Version 74 of FeaturesofPdaf


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Timestamp:
Dec 20, 2019, 5:46:42 PM (5 years ago)
Author:
lnerger
Comment:

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  • FeaturesofPdaf

    v73 v74  
    7474In addition, the scalability of PDAF was examined with a real implementation with the finite element ocean model (FEOM, Danilov et al., A finite-element ocean model: Principles and evaluation. Ocean Modeling 6 (2004) 125-150). In these tests up to 4800 processor cores of a supercomputer have been used (see [PublicationsandPresentations Nerger and Hiller (2013)]).
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    76 To examine PDAF's behavior with large-scale cases, experiments with the simulated model have been performed. By now the biggest case had a state dimension of 8.64^.^10^11^. An observation vector of size 1.73^.^10^10^ was assimilated. For these experiments, the computations used 57600 processor cores. In this case, the distributed ensemble array occupied about 2.9 GBytes of memory for each core.
     76To examine PDAF's behavior with large-scale cases, experiments with the simulated model have been performed. By now the biggest case had a state dimension of 8.64^.^10^11^. An observation vector of size 1.73^.^10^10^ was assimilated. For these experiments, the computations used 57600 processor cores. In this case, the dimensions were limited by the available memory of the compute nodes. Using an ensemble of 25 states, the distributed ensemble array occupied about 2.9 GBytes of memory for each core (about 165 TBytes in total).
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