TY - JOUR AU - Polgár, Péter AU - Menyhárt, Tamás AU - Baksay, Csanád Bátor AU - Kocsis, Gergely AU - Tajti, Tibor AU - Gál, Zoltán TI - Three level benchmarking of Singularity containers for scientific calculations JF - ANNALES MATHEMATICAE ET INFORMATICAE J2 - ANN MATH INFORM VL - 58 PY - 2023 SP - 133 EP - 146 PG - 14 SN - 1787-5021 DO - 10.33039/ami.2023.08.014 UR - https://m2.mtmt.hu/api/publication/34214671 ID - 34214671 LA - English DB - MTMT ER - TY - JOUR AU - Kocsis, Gergely AU - Varga, Imre TI - gtfs2net: Extraction of General Transit Feed Specification Data Sets to Abstract Networks and Their Analysis JF - BIG DATA J2 - BIG DATA-US PY - 2023 SN - 2167-6461 DO - 10.1089/big.2022.0269 UR - https://m2.mtmt.hu/api/publication/33835280 ID - 33835280 LA - English DB - MTMT ER - TY - CHAP AU - Kocsis, Gergely AU - Varga, Imre TI - Extracting Mass Transportation Networks from General Transit Feed Specification Datasets T2 - Proceedings of the 7th International Conference on Complexity, Future Information Systems and Risk SN - 9789897585654 PY - 2022 SP - 85 EP - 91 PG - 7 DO - 10.5220/0011080700003197 UR - https://m2.mtmt.hu/api/publication/32801240 ID - 32801240 N1 - https://www.scitepress.org/PublicationsDetail.aspx?ID=ktqdpyFkyzo%3d&t=1 AB - In several smart-city applications the networks of the mass-transportation systems can be bases of investigations. In this paper we show how one can extract a network of connected stops from the General Transit Feed Specification (GTFS) feed of a given service provider. We have also implemented this process as a tool (gtfs2net) that is available for use at the GitHub page of the project. On of our most important finding is that since providers do not follow the specification in a coherent way regarding the use of parent stations the problem of close stops has to be manually handled. In order to show how our tool works in practice we have provided some extracted networks with their properties. LA - English DB - MTMT ER - TY - JOUR AU - Gál, Zoltán AU - Kocsis, Gergely AU - Tajti, Tibor AU - Tornai, Róbert TI - Performance evaluation of massively parallel and high speed connectionless vs. connection oriented communication sessions JF - ADVANCES IN ENGINEERING SOFTWARE J2 - ADV ENG SOFTW VL - 157-158 PY - 2021 PG - 20 SN - 0965-9978 DO - 10.1016/j.advengsoft.2021.103010 UR - https://m2.mtmt.hu/api/publication/32027793 ID - 32027793 N1 - University of Debrecen, Faculty of Informatics, Debrecen P.O. Box 400, H-4002, Hungary Eszterházy Károly University, Institute of Mathematics and Informatics, Hungary Cited By :2 Export Date: 6 December 2022 CODEN: AESOD Correspondence Address: Gál, Z.; University of Debrecen, Hungary; email: zgal@unideb.hu Funding details: European Commission, EC Funding details: European Social Fund, ESF Funding details: Debreceni Egyetem, DE, EFOP-3.6.3-VEKOP-16-2017-00002, FIKP-20428-3/2018/FEKUTSTRAT Funding text 1: This paper was supported by two projects of the University of Debrecen, Debrecen, Hungary: Big Data project with code FIKP-20428-3/2018/FEKUTSTRAT. This work was also supported by the construction EFOP-3.6.3-VEKOP-16-2017-00002. The project was supported by the European Union, co-financed by the European Social Fund and EFOP-3.6.3-VEKOP-16-2017-00002, respectively. Thanks to QoS-HPC-IoT Laboratory for technological assistance. AB - In this paper we focus on the fast communication issues of the Big Data processing tasks shared between High Performance Computing systems. In our performance evaluation framework we designed and developed two traffic measurement tools in order to answer some theoretical questions related to congestion control in practice. The first one is based on iperf and tcpdump softwares to capture data flows of TCP and UDP sessions. Classification aspects of the measurement cases were: homogeneity of the traffics, number of parallel communication sessions, and implementation types of the TCP congestion control algorithm. Dozens of parallel traffic scenarios were executed in a dumbbell topology to evaluate effects of the massively parallel communication sessions in wireline local and metropolitan area networks. Since we found that connection oriented data transfer sessions have limited performance features during communication, we implemented a second communication tool named Fast Manager of File Transfer (FMFT). This application with transfer rate monitoring and regulation capability is based on parallel connectionless data transfer sessions supervised by a common connection oriented control session and provides better transfer rate than the classical file transfer mechanisms using TCP services. Methodology of the statistical analysis and highlights of this heterogeneous parallel communication mechanism are explained, too. LA - English DB - MTMT ER - TY - CONF AU - Gál, Zoltán AU - Polgár, Péter AU - Tornai, Róbert AU - Tajti, Tibor AU - Kocsis, Gergely TI - Wavelet and recurrent neural network-based performance analysis of fast connectionless data transfers T2 - Proceedings of CITDS2020 (Conference on Information Technology and Data Science) PY - 2020 SP - 64 EP - 66 PG - 3 UR - https://m2.mtmt.hu/api/publication/33194827 ID - 33194827 LA - English DB - MTMT ER - TY - JOUR AU - Varga, Imre AU - Kocsis, Gergely TI - Statistical Properties of VANET-based Information Spreading JF - ADVANCES IN SYSTEMS SCIENCE AND APPLICATIONS J2 - ADV SYST SCI APPL VL - 20 PY - 2020 IS - 4 SP - 36 EP - 44 PG - 9 SN - 1078-6236 UR - https://m2.mtmt.hu/api/publication/31796827 ID - 31796827 N1 - 10.25728/assa.2020.20.4.895 Scopus:hiba:85098989137 2022-10-13 08:34 év nem egyezik LA - English DB - MTMT ER - TY - CONF AU - Miklós, Becsei AU - Máté, Csongor Széll AU - Kocsis, Gergely ED - Kovásznai, Gergely ED - Fazekas, István ED - Tómács, Tibor TI - Implementing a New Interface for Directed Graph Analysis by Existing and New Algorithms T2 - Proceedings of the 11th International Conference on Applied Informatics (ICAI 2020) PB - CEUR Workshop Proceedings C1 - Eger T3 - CEUR Workshop Proceedings, ISSN 1613-0073 ; 2650. PY - 2020 SP - 38 EP - 45 PG - 8 UR - https://m2.mtmt.hu/api/publication/31635370 ID - 31635370 N1 - Scopus:hiba:85090827033 2022-10-13 10:38 típus nem egyezik LA - English DB - MTMT ER - TY - CHAP AU - Széll, Máté AU - Becsei, Miklós AU - Kocsis, Gergely ED - Behringer, Reinhold ED - Chang, Victor TI - Introduction to DiNA: An Extendable Web-application for Directed Network Analysis T2 - Proceedings of the 5th International Conference on Complexity, Future Information Systems and Risk PB - SciTePress CY - Setubal SN - 9789897584275 PY - 2020 SP - 129 EP - 135 PG - 7 DO - 10.5220/0009577701290135 UR - https://m2.mtmt.hu/api/publication/31635333 ID - 31635333 LA - English DB - MTMT ER - TY - JOUR AU - Kocsis, Gergely AU - Varga, Imre TI - The effect of moving agents on the network formation in smart-city applications JF - Computer modeling and new technologies J2 - Computer modeling and new technologies VL - 23 PY - 2019 IS - 1 SP - 44 EP - 49 PG - 6 SN - 1407-5806 UR - https://m2.mtmt.hu/api/publication/30768672 ID - 30768672 LA - English DB - MTMT ER - TY - CHAP AU - Gál, Zoltán AU - Varga, Imre AU - Tajti, Tibor AU - Kocsis, Gergely AU - Langmajer, Z. AU - Kósa, Márk Szabolcs AU - Pánovics, János ED - P., Iványi ED - B. H., V. Topping TI - Performance evaluation of massively parallel communication sessions T2 - Proceedings of the Sixth International Conference on Parallel, Distributed, GPU and Cloud Computing for Engineering PB - Civil-Comp Press CY - Pécs SN - 9781905088676 PY - 2019 SP - 1 EP - 19 PG - 19 DO - 10.4203/ccp.112.34 UR - https://m2.mtmt.hu/api/publication/30716349 ID - 30716349 AB - Main issues of the Big Data processing imply high speed transmission between different nodes of the infocommunication system. Best effort based datagram delivery of the protocol data units requires bandwidth in the scale of n*10 Mb/s for time critical services. Although IntServ and DiffServ QoS mechanisms make possible for time critical data flows to be forwarded in reasonable conditions, high speed transmission of the big data in LAN/WAN environments remains hot topic. Different implementations of the TCP congestion control mechanism were developed in the last decades. The QoS strategies applied in LAN environment are weakly usable in wide area data networks producing low usage efficiency of the communication path traversing different ISPs. In our performance evaluation framework we developed an own measurement tool based on iperf and tcpdump software to capture data flows of TCP and UDP sessions. Classification aspects of the measurement cases were: homogeneity of the traffics, number of parallel communication sessions and implementation types of the TCP congestion control algorithm. High number of traffic scenarios were executed in a dump-bell topology. Statistical analysis methods were used to evaluate effects of the aspects mentioned above in the wireline local and metropolitan area networks. LA - English DB - MTMT ER -