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001-es BibID:	BIBFORM094402
035-os BibID:	(cikkazonosító)103010 (WOS)000653696200005 (Scopus)85106320362
Első szerző:	Gál Zoltán (informatikus)
Cím:	Performance evaluation of massively parallel and high speed connectionless vs. connection oriented communication sessions / Gál Zoltán, Kocsis Gergely, Tajti Tibor, Tornai Robert
Dátum:	2021
ISSN:	0965-9978
Megjegyzések:	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.
Tárgyszavak:	Műszaki tudományok Informatikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk High speed networking High performance computing Parallel communication Internet Congestion control Traffic engineering Statistical analysis Scale independence
Megjelenés:	Advances In Engineering Software. - 157-158 (2021), p. 1-20. -
További szerzők:	Kocsis Gergely (1983-) (programtervező matematikus) Tajti Tibor Gábor (1970-) (informatikus) Tornai Róbert (1976-) (informatikus, matematikus)
Pályázati támogatás:	EFOP-3.6.3-VEKOP-16-2017-00002 EFOP
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM079185
035-os BibID:	(cikkazonosító)34
Első szerző:	Gál Zoltán (informatikus)
Cím:	Performance evaluation of massively parallel communication sessions / Z. Gál, I. Varga, T. Tajti, G. Kocsis, Z. Langmajer, M. Kosa, J. Panovics
Dátum:	2019
Megjegyzések:	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.
ISBN:	978-1-905088-67-6
Tárgyszavak:	Természettudományok Matematika- és számítástudományok előadáskivonat high speed networking parallel communication congestion control traffic engineering statistical analysis scale independence
Megjelenés:	Proceedings of the Sixth International Conference on Parallel, Distributed, GPU and Cloud Computing for Engineering / ed. P. Iványi, B. H. V. Topping. - p. 1-19. -
További szerzők:	Varga Imre (1979-) (fizikus, informatikus) Tajti Tibor Gábor (1970-) (informatikus) Kocsis Gergely (1983-) (programtervező matematikus) Langmajer Z. Kósa Márk (1975-) (programtervező matematikus) Pánovics János (1975-) (programtervező matematikus)
Pályázati támogatás:	FIKP-20428-3/2018/FEKUTSTRAT FIKP EFOP-3.6.3-VEKOP-16-2017-00002 EFOP
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat
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