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1
Content available remote Instability issues in the server room cooling system
Kwiatkowski T., Prusiński P., Zgorzelski D., Kozioł S
Journal of Power Technologies
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2017
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Vol. 97, nr 3
252--258
EN
Since 2009, the National Center for Nuclear Research in Poland has been constructing its own High Performance Computing (HPC) Centre under the name Świerk Computing Centre (CIŚ). Now, it is ready reaching its target - 1 PFLOPS - in December 2015. However at the early operation stage, one of its major problems was the unstable work of the HPC cluster cooling system, resulting in increased maintenance costs. The main aim of this work is to thoroughly investigate the origin of the problem and to find the best solution for it based on results from a Computational Fluid Dynamics (CFD) analysis. The constructors suspected that the oscillations in the flow domain are caused by thermal flow stratification, but something else was proved. In this paper, a wide range of cases will be analyzed, covering different work regimes of the installation as well as various geometry modifications. Finally, certain improvement to the current design will be suggested by the CFD Analysis Group.
2
Content available remote Optimization calculations with the genetic algorithm method on a computer cluster
Jajczyk J.
Przegląd Elektrotechniczny
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2014
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R. 90, nr 4
232--234
EN
The work presents a way to execute optimization calculations with the genetic algorithm method on a parallel computer of the cluster type. The scope of electromagnetic calculations which should be performed while determining the objective function was outlined. Sample indicators describing the quality of paralleling the calculation process were provided.
PL
W pracy przedstawiono sposób realizacji obliczeń optymalizacyjnych metodą algorytmu genetycznego na komputerze równoległym typu klaster. Zakreślono zakres obliczeń elektromagnetycznych, które należy wykonać podczas wyznaczania funkcji celu. Podano przykładowe wskaźniki opisujące jakość zrównoleglenia procesu obliczeniowego.
3
Task parallelization of image recognition procedures in a computer cluster
Podpora M.
Zeszyty Naukowe. Elektryka / Politechnika Opolska
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2010
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z. 63
48-49
EN
In this paper author describes the advantage of using the task parallelism when processing video systems' data stream in a computer cluster.
4
Content available Komputer równoległy ASGARD przeznaczony do obliczeń w geofizyce
Mirek J.
Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
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2009
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T. 35, z. 2/1
535-539
EN
The new parallel computer ASGARD has been designed and built in Department of Geophysics of Faculty of Geology, Geophysics and Environmental Protection AGH University, which contains twenty dual-core processors. The computer is designed for numerical calculation and mathematical modeling. It works under Linux operating system with OpenSSI clustering system. User can find there installed software like compilators, Matlab, Octave, DORIS and other programs written for special purposes.
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