Dario Ogrizović
University of Rijeka
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Publication
Featured researches published by Dario Ogrizović.
international convention on information and communication technology electronics and microelectronics | 2017
Draško Tomić; Zlatan Car; Dario Ogrizović
Despite the various hardware and software improvements in Cloud architecture, there still exists the huge performance gap between the commodity supercomputers and Cloud when running HPC communication intensive applications. In order to find what is preventing them to better scale on Cloud, we evaluated HPL and NAMD benchmarks on HPE Openstack testbed, and NAMD benchmarks on supercomputer located at Rijeka University Supercomputing Center. Our results revealed two major bottlenecks: the throughput of the interconnect, and Cloud orchestration layer, among other responsible for the management of the communication between Cloud instances. We investigated the influence of jittering, but did not find the significant influence on performance. Our conclusion is that by solely increasing the interconnect throughput, one will not improve the scalability of HPC communication intensive HPC applications in Cloud. This is also backed up with NAMD performed at HP Labs, and with HPL benchmark performed at San Diego Supercomputing Center. We propose two possible scenarios of scalability improvements. One with distributed model of Cloud Orchestration layer; another with bare metal containers. Efficient load balancing remains the must if we want to see HPC applications scaling over many million Cloud cores. For this, we propose novel SLEM based load balancing strategy.
The 33rd International Convention MIPRO | 2010
V. Mateljan; D. Cisic; Dario Ogrizović
Pomorstvo | 2009
Edvard Tijan; Serđo Kos; Dario Ogrizović
international convention on information and communication technology electronics and microelectronics | 2011
Berislav Biocic; Draško Tomić; Dario Ogrizović
international convention on information and communication technology electronics and microelectronics | 2011
Petra Galovic; Dragan Čišić; Dario Ogrizović
Tehnicki Vjesnik-technical Gazette | 2013
Draško Tomić; Dario Ogrizović; Zlatan Car
international convention on information and communication technology, electronics and microelectronics | 2012
Draško Tomić; Dario Ogrizović
International Conference on Climate Friendly Transport "Shaping Climate Friendly Transport in Europe : Key Findings & Future Directions" | 2011
Dragan Čišić; Ana Perić-Hadžić; Edvard Tijan; Dario Ogrizović
international convention on information and communication technology, electronics and microelectronics | 2010
Dragan Čišić; Marina Čičin-Šain; Dario Ogrizović
Pomorstvo, Journal of Maritime Studies | 2009
Tanja Poletan Jugović; Ana Peric Hadzic; Dario Ogrizović