Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/CLUSTERWorkshops61563.2024.00028

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Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/COMNETSAT63286.2024.10862254

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/COMPSAC61105.2024.00194

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Other Link： https://dblp.uni-trier.de/db/conf/compsac/compsac2024.html#ChoonhaklaiII24

J-GLOBAL

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Publishing type：Research paper (international conference proceedings)   Publisher：Springer Nature Singapore  

DOI： 10.1007/978-981-99-8211-0_4

Scopus

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Publishing type：Research paper (international conference proceedings)   Publisher：Springer Nature Switzerland  

DOI： 10.1007/978-3-031-46970-1_21

Scopus

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Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s42979-023-01827-9

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Other Link： https://link.springer.com/article/10.1007/s42979-023-01827-9/fulltext.html

J-GLOBAL

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1109/ACCESS.2023.3289836

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Institute of Electronics, Information and Communication Engineers  

DOI： 10.1587/transcom.2022EBT0003

Scopus

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Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/APSEC60848.2023.00075

Web of Science

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Other Link： https://dblp.uni-trier.de/db/conf/apsec/apsec2023.html#SuwanachotePKILRMI23

Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/CANDAR60563.2023.00017

Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/candar/candar2023.html#KangTNII23

Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Institute of Electronics, Information and Communication Engineers  

DOI： 10.1587/transcom.2021EBP3083

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J-GLOBAL

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Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/ICFEC54809.2022.00008

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Other Link： https://dblp.uni-trier.de/db/conf/icfec/icfec2022.html#ThonglekTINLI22

Publishing type：Research paper (scientific journal)  

DOI： 10.1109/ACCESS.2022.3190627

Scopus

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Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/CCNC49033.2022.9700608

Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/ccnc/ccnc2022.html#SugiuraTII22

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1145/3437359.3465571

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Other Link： https://dblp.uni-trier.de/db/conf/xsede/pearc2021.html#TakahashiWIPTHS21

Language：English  

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I031546668

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society for Software Science and Technology  

In PBL, it is often pointed out that it is difficult to qualitatively evaluate the improvement of students' fundamental competencies for working persons. In this study, we propose a method to evaluate students' growth and to improve classes through self-evaluation by students and objective evaluation by a third party as an approach to qualitative evaluation of PBL courses. In the proposed method, we aim to evaluate the validity of the subjective self-evaluation by the students before and after taking the PBL course, based on the objective evaluation. In this paper, we report on the evaluation results of the PBL course in 2017 and 2018 by the proposed method using the self-evaluation of fundamental competencies for working persons before and after taking the PBL course and the objective evaluation through PROG competency test.

DOI： 10.11309/jssst.38.1_52

Scopus

CiNii Books

J-GLOBAL

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society for Software Science and Technology  

<p>In PBL, it is often pointed out that it is difficult to qualitatively evaluate the improvement of students' fundamental competencies for working persons. In this study, we propose a method to evaluate students' growth and to improve classes through self-evaluation by students and objective evaluation by a third party as an approach to qualitative evaluation of PBL courses. In the proposed method, we aim to evaluate the validity of the subjective self-evaluation by the students before and after taking the PBL course, based on the objective evaluation. In this paper, we report on the evaluation results of the PBL course in 2017 and 2018 by the proposed method using the self-evaluation of fundamental competencies for working persons before and after taking the PBL course and the objective evaluation through PROG competency test.</p>

DOI： 10.11309/jssst.38.1_52

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J-GLOBAL

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Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/IGESSC53124.2021.9618702

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Publishing type：Research paper (international conference proceedings)   Publisher：SCITEPRESS - Science and Technology Publications  

Virtual Machines (VMs) are used extensively in cloud computing. The underlying hypervisor allows hardware resources to be split into multiple virtual units which enhances resource utilization. However, VMs with traditional architecture introduce heavy overhead and reduce application performance. Containers have been introduced to overcome this drawback, yet such a solution raises security concerns due to poor isolation. Lightweight hypervisors have been leveraged to strike a balance between performance and isolation. However, there has been no comprehensive performance comparison among them. To identify the best fit use case, we investigate the performance characteristics of Docker container, Kata containers, gVisor, Firecracker and QEMU/KVM by measuring the performance on disk storage, main memory, CPU, network, system call and startup time. In addition, we evaluate their performance of running Nginx web server and MySQL database management system. We use QEMU/KVM as an example of traditional VM, Docker as the standard container and the rest as the representatives of lightweight hypervisors. We compare and analyze the benchmarking results, discuss the possible implications, explain the trade-off each organization made and elaborate on the pros and cons of each architecture.

DOI： 10.5220/0010440502150223

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Other Link： https://dblp.uni-trier.de/db/conf/closer/closer2021.html#LiTIITP21

Publishing type：Research paper (international conference proceedings)   Publisher：SCITEPRESS  

Virtual Machines (VMs) are used extensively in cloud computing. The underlying hypervisor allows hardware resources to be split into multiple virtual units which enhances resource utilization. However, VMs with traditional architecture introduce heavy overhead and reduce application performance. Containers have been introduced to overcome this drawback, yet such a solution raises security concerns due to poor isolation. Lightweight hypervisors have been leveraged to strike a balance between performance and isolation. However, there has been no comprehensive performance comparison among them. To identify the best fit use case, we investigate the performance characteristics of Docker container, Kata containers, gVisor, Firecracker and QEMU/KVM by measuring the performance on disk storage, main memory, CPU, network, system call and startup time. In addition, we evaluate their performance of running Nginx web server and MySQL database management system. We use QEMU/KVM as an example of traditional VM, Docker as the standard container and the rest as the representatives of lightweight hypervisors. We compare and analyze the benchmarking results, discuss the possible implications, explain the trade-off each organization made and elaborate on the pros and cons of each architecture.

DOI： 10.5220/0010440502150223

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Other Link： https://dblp.uni-trier.de/db/conf/closer/closer2021.html#LiTIITP21

Publishing type：Research paper (scientific journal)   Publisher：Studies in Computational Intelligence  

DOI： 10.1007/978-3-030-58930-1_23

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Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

DOI： 10.1109/ICMLA51294.2020.00120

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Other Link： https://dblp.uni-trier.de/db/conf/icmla/icmla2020.html#ThonglekTIIN20

Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

Empirical Dynamic Modeling (EDM) is a nonlinear time series causal inference framework. The latest implementation of EDM, cppEDM, has only been used for small datasets due to computational cost. With the growth of data collection capabilities, there is a great need to identify causal relationships in large datasets. We present mpEDM, a parallel distributed implementation of EDM optimized for modern GPU-centric supercomputers. We improve the original algorithm to reduce redundant computation and optimize the implementation to fully utilize hardware resources such as GPUs and SIMD units. As a use case, we run mpEDM on AI Bridging Cloud Infrastructure (ABCI) using datasets of an entire animal brain sampled at single neuron resolution to identify dynamical causation patterns across the brain. mpEDM is 1, 530× faster than cppEDM and a dataset containing 101, 729 neuron was analyzed in 199 seconds on 512 nodes. This is the largest EDM causal inference achieved to date.

DOI： 10.1109/ICPADS51040.2020.00035

Scopus

arXiv

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Other Link： https://dblp.uni-trier.de/db/journals/corr/corr2011.html#abs-2011-11082

Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/IJCNN48605.2020.9207190

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Other Link： https://dblp.uni-trier.de/db/conf/ijcnn/ijcnn2020.html#ThonglekTINNTI20

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society for Software Science and Technology  

<p>AiBiC Kansai offers an education course, AiBiC Spiral, designed to develop abilities to solve individual social issues using Big Data, artificial intelligence, and Cloud technologies through teamwork. In this paper, we report on the problems of the environments for the education program and the discrepancies in the expectations on topics and contents found by the analysis of the questionnaire conducted in 2017, and describe the activities and results performed to improve the program in 2018. Through the improvements, we have found that the problem on the program environments has been dissolved. However, as for the discrepancies in the expectations, we have revealed that only some part of the problem was improved and there were still some students found the topics and contents provided by the program were different from their expectations.</p>

DOI： 10.11309/jssst.37.1_19

Scopus

CiNii Books

J-GLOBAL

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Language：Japanese  

J-GLOBAL

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Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

Empirical Dynamic Modeling (EDM) is a nonlinear time series causal inference framework. The latest implementation of EDM, cppEDM, has only been used for small datasets due to computational cost. With the growth of data collection capabilities, there is a great need to identify causal relationships in large datasets. We present mpEDM, a parallel distributed implementation of EDM optimized for modern GPU-centric supercomputers. We improve the original algorithm to reduce redundant computation and optimize the implementation to fully utilize hardware resources such as GPUs and SIMD units. As a use case, we run mpEDM on AI Bridging Cloud Infrastructure (ABCI) using datasets of an entire animal brain sampled at single neuron resolution to identify dynamical causation patterns across the brain. mpEDM is 1, 530× faster than cppEDM and a dataset containing 101, 729 neuron was analyzed in 199 seconds on 512 nodes. This is the largest EDM causal inference achieved to date.

DOI： 10.1109/ICPADS51040.2020.00035

Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/icpads/icpads2020.html#Watanakeesuntorn20

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society for Software Science and Technology  

AiBiC Kansai offers an education course, AiBiC Spiral, designed to develop abilities to solve individual social issues using Big Data, artificial intelligence, and Cloud technologies through teamwork. In this paper, we report on the problems of the environments for the education program and the discrepancies in the expectations on topics and contents found by the analysis of the questionnaire conducted in 2017, and describe the activities and results performed to improve the program in 2018. Through the improvements, we have found that the problem on the program environments has been dissolved. However, as for the discrepancies in the expectations, we have revealed that only some part of the problem was improved and there were still some students found the topics and contents provided by the program were different from their expectations.

DOI： 10.11309/jssst.37.1_19

Scopus

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J-GLOBAL

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1587/transcom.2019CPI0001

Web of Science

Scopus

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Language：English   Publishing type：Research paper (other academic)  

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/CLUSTER.2019.8891022

Web of Science

Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/cluster/cluster2019.html#ThonglekITIN19

Language：Japanese  

CiNii Books

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CiNii Books

J-GLOBAL

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J-GLOBAL

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CiNii Books

J-GLOBAL

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

J-GLOBAL

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/BCD2018.2018.00013

Web of Science

Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/bcd/bcd2018.html#SaikiFIKNMYK18

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/APWConCSE.2017.00017

Web of Science

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Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/ICSEC.2018.8712757

Scopus

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Language：English   Publishing type：Research paper (other academic)  

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Language：English  

CiNii Books

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I028943716

Language：English  

CiNii Books

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Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I028942930

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/ICTKE.2017.8259622

Scopus

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Language：Japanese   Publisher：電子情報通信学会  

CiNii Books

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/CloudCom.2017.27

Web of Science

Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/cloudcom/cloudcom2017.html#JeongFI17

Language：Japanese   Publisher：日本ソフトウェア科学会  

CiNii Books

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Language：English   Publishing type：Research paper (scientific journal)  

CiNii Books

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Other Link： http://id.nii.ac.jp/1001/00183236/

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/CLOUD.2017.11

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Other Link： https://dblp.uni-trier.de/db/conf/IEEEcloud/IEEEcloud2017.html#JeongFI17

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/COMPSAC.2017.94

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Other Link： https://dblp.uni-trier.de/db/conf/compsac/compsac2017-1.html#U-ChupalaWIDI17

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute of Electrical and Electronics Engineers Inc.  

DOI： 10.1109/ISUVR.2017.15

Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/isuvr/isuvr2017.html#ChanIWI17

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s40012-017-0171-y

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Other Link： http://link.springer.com/content/pdf/10.1007/s40012-017-0171-y.pdf

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.17083/ijsg.v4i2.163

Web of Science

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Other Link： https://dblp.uni-trier.de/db/journals/ijsg/ijsg4.html#ChanIWUI17

Language：English   Publishing type：Research paper (other academic)  

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Information Processing Society of Japan  

DOI： 10.2197/ipsjjip.25.924

Scopus

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY  

Multipath transmission control protocol(TCP), or MPTCP, is a widely-researched mechanism that allows a single application-level connection to be split to more than 1 TCP stream and, consequently, more than 1 network interface, as opposed to the traditional TCP/IP model. Being a transport layer protocol, MPTCP can easily interact between the application using it and the network supporting it. However, MPTCP does not have control of its own route. Default IP routing behavior generally takes all traffic through the shortest or best metric path. However, this behavior may actually cause paths to collide with each other, creating contention for bandwidth in a number of edges. This can result in a bottleneck that limits the throughput of the network. Therefore, a multipath routing mechanism is necessary to ensure smooth operation of MPTCP. We created smoc, a simple multipath OpenFlow controller, that uses only topology information of the network to avoid collision where possible. Evaluation of smoc in a virtual local-area and a physical wide–area software-defined networks showed favorable results as smoc provided better performance than simple or spanning tree–routing mechanisms.

DOI： 10.6084/M9.FIGSHARE.1558361.V1

Web of Science

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arXiv

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1002/cpe.4138

Web of Science

Scopus

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Language：Japanese  

J-GLOBAL

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Language：English   Publishing type：Research paper (international conference proceedings)  

Web of Science

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/IIAI-AAI.2016.75

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Other Link： https://dblp.uni-trier.de/db/conf/iiaiaai/iiaiaai2016.html#NakagawaKSIKKKY16

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/ICDCS.2016.80

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Other Link： https://dblp.uni-trier.de/db/conf/icdcs/icdcs2016.html#HuangNII16

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/MIPRO.2016.7522145

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Other Link： https://dblp.uni-trier.de/db/conf/mipro/mipro2016.html#WatashibaDAIKYK16

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/ISCIT.2015.7458357

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Other Link： https://dblp.uni-trier.de/db/conf/iscit/iscit2015.html#MakpaisitIUDTK15

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/ICCCRI.2015.13

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Other Link： https://dblp.uni-trier.de/db/conf/icccri/icccri2015.html#DateAKTKWUIYKS15

Language：English   Publishing type：Research paper (other academic)  

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.2174/1381612822666160414142530

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PubMed

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/978-3-319-46100-7_13

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1016/j.procs.2016.05.427

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Other Link： https://dblp.uni-trier.de/db/conf/iccS/iccS2016.html#SeraMWIH16

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.future.2015.09.033

Web of Science

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CiNii Books

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Language：Japanese   Publishing type：Research paper (scientific journal)  

It is important to ensure robustness and availability of information infrastructures against disasters and faults. There are many technologies of distribution and redundancy, but most of them do not provide practical validation methods on faults. We propose a platform to evaluate disaster tolerance and fault resistance of distributed systems with an SDN technology emulating artificial disasters and faults. In this paper, we introduce a design and its implementation of the platform, and then also show the effectiveness of the platform through evaluation experiments on it.

CiNii Books

J-GLOBAL

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Language：Japanese   Publisher：電子情報通信学会  

CiNii Books

J-GLOBAL

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Language：Japanese   Publisher：電子情報通信学会  

CiNii Books

J-GLOBAL

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/eScience.2015.49

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Other Link： https://dblp.uni-trier.de/db/conf/eScience/eScience2015.html#NguyenMTDIH15

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/eScience.2015.37

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Other Link： https://dblp.uni-trier.de/db/conf/eScience/eScience2015.html#HuangNII15

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/CloudCom.2014.90

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Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/cloudcom/cloudcom2014.html#U-ChupalaIIKUDAYK14

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/CloudCom.2014.82

Web of Science

Scopus

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Other Link： https://dblp.uni-trier.de/db/conf/cloudcom/cloudcom2014.html#WatashibaDAKIYKST14

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

ICT systems are expected to ensure high availability against not only possible failures but also unexpected multiple failures due to wide-scale disaster. It is necessary to continuous evaluations on the operation through education or training. This study proposes a verification platform which enables to arbitrary-generate disasters or failures using SDN to evaluate disaster tolerance of the distributed system.

CiNii Books

J-GLOBAL

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Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

It is important to ensure toughness and robustness of infrastructure for information network such as the Internet. To ensure toughness and robustness, there are several solution such as redundant configurations, SPoF (single point of failure) less wide-are distribution. In this paper, authors design and evaluate a platform to evaluate disaster tolerance of communication systems by immitating existing disaster records.

CiNii Books

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Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

It is important to ensure toughness and robustness of infrastructure for information network such as the Internet. In this paper, authors validate and evaluate distributed systems by using a SDDE (Software Defined Disaster Emulation) platform.

CiNii Books

J-GLOBAL

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Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

In the wide-area distributed systems such as the Internet, it is important to ensure the robustness and the availability through data distribution and redundancy for disaster and failure. We propose a platform which called SDDE (Software Defined Disaster Emulation) to evaluate disaster resistance and disaster tolerance by emulating some disaster and failure. In this paper, we report an evaluation experiment of the disaster resistance for BGP routing system using our proposed SDDE platform.

CiNii Books

J-GLOBAL

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Publishing type：Research paper (scientific journal)  

The Pacific Rim Application and Grid Middleware Assembly (PRAGMA) is an
international community of researchers that actively collaborate to address
problems and challenges of common interest in eScience. The PRAGMA Experimental
Network Testbed (PRAGMA-ENT) was established with the goal of constructing an
international software-defined network (SDN) testbed to offer the necessary
networking support to the PRAGMA cyberinfrastructure. PRAGMA-ENT is isolated,
and PRAGMA researchers have complete freedom to access network resources to
develop, experiment, and evaluate new ideas without the concerns of interfering
with production networks.
In the first phase, PRAGMA-ENT focused on establishing an international L2
backbone. With support from the Florida Lambda Rail (FLR), Internet2,
PacificWave, JGN-X, and TWAREN, PRAGMA-ENT backbone connects Open\-Flow-enabled
switches at University of Florida (UF), University of California San Diego
(UCSD), Nara Institute of Science and Technology (NAIST, Japan), Osaka
University (Japan), National Institute of Advanced Industrial Science and
Technology (AIST, Japan), and National Center for High-Performance Computing
(Taiwan).
The second phase of PRAGMA-ENT consisted of evaluation of technologies for
the control plane that enables multiple experiments (i.e., OpenFlow
controllers) to co-exist. Preliminary experiments with FlowVisor revealed some
limitations leading to the development of a new approach, called AutoVFlow.
This paper will share our experience in the establishment of PRAGMA-ENT
backbone (with international L2 links), its current status, and control plane
plans. Discussion on preliminary application ideas, including optimization of
routing control; multipath routing control; and remote visualization will also
be discussed.

arXiv

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Other Link： https://dblp.uni-trier.de/db/journals/corr/corr1509.html#IchikawaTHYLKUH15

Publishing type：Research paper (scientific journal)  

Multipath transmission control protocol(TCP), or MPTCP, is a widely-researched mechanism that allows a single application-level connection to be split to more than 1 TCP stream and, consequently, more than 1 network interface, as opposed to the traditional TCP/IP model. Being a transport layer protocol, MPTCP can easily interact between the application using it and the network supporting it. However, MPTCP does not have control of its own route. Default IP routing behavior generally takes all traffic through the shortest or best metric path. However, this behavior may actually cause paths to collide with each other, creating contention for bandwidth in a number of edges. This can result in a bottleneck that limits the throughput of the network. Therefore, a multipath routing mechanism is necessary to ensure smooth operation of MPTCP. We created smoc, a simple multipath OpenFlow controller, that uses only topology information of the network to avoid collision where possible. Evaluation of smoc in a virtual local-area and a physical wide–area software-defined networks showed favorable results as smoc provided better performance than simple or spanning tree–routing mechanisms.

DOI： 10.1002/cpe.4134

Scopus

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Other Link： https://dblp.uni-trier.de/db/journals/corr/corr1509.html#NakasanIIU15

Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

In the wide-area distributed systems such as the Internet, it is important to ensure the robustness and the availability through data distribution and redundancy for disaster and failure. We propose a platform which called SDDE (Software Defined Disaster Emulation) to evaluate disaster resistance and disaster tolerance by emulating some disaster and failure. In this paper, we report an evaluation experiment of the disaster resistance for wide-area distributed storage system using our proposed SDDE platform.

CiNii Books

J-GLOBAL

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J-GLOBAL

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Language：Japanese  

J-GLOBAL

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CiNii Books

J-GLOBAL

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CiNii Books

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Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s12626-014-0045-9

Web of Science

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Other Link： http://link.springer.com/article/10.1007/s12626-014-0045-9/fulltext.html

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/COMPSAC.2014.71

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Other Link： https://dblp.uni-trier.de/db/conf/compsac/compsac2014.html#NakagawaIKKKS14

Language：English   Publisher：Information Processing Society of Japan (IPSJ)  

This paper discusses the use of Multipath TCP (MPTCP), which is a TCP extension that allows multiple TCP flows to be associated to one application-layer logical connection, coupled with OpenFlow traffic engineering in a single stack to provide a comprehensive multipathing solution, with OpenFlow providing optimal path sets while MPTCP utilizing them. This design should be able to maximize bandwidth and network path utilization by allowing hosts to take advantage of presently-unused paths. Design of the testbed, also to be used by our research group in future projects, is also discussed in this paper. Finally, we discuss evaluation of network performance when using multiple paths, as well as concerns raised by our work. In summary, our system functioned as expected and provided feasible performance in small virtual network. This design should be scalable to benefit distributed file storage systems, data-intensive services, or any high-performance computing systems.

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Language：English   Publisher：Information Processing Society of Japan (IPSJ)  

Bandwidth and latency are two major factors that contribute the most to network application performance. Between each pair of switches in a network, there may be multiple paths connecting them. Each path has different properties because of multiple factors. Traditional shortest-path routing does not take this knowledge into consideration and may result in sub-optimal performance of applications and underutilization of network. We proposed a concept of "bandwidth and latency aware routing". The idea is that we could improve overall performance of the network by separating application into bandwidth-oriented and latency-oriented application and allocate different route for each type of application accordingly. We also proposed a design of this network system implemented using OpenFlow. Routes are calculated from monitored information using Dijkstra algorithm and its variation. To support our design, we show a use case in which our design performs better than traditional routing.

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

The authors have been researching and developing widely distributed storage environment that is characterized by high performance of random I/O access. It is difficult for conventional distributed storage to serve practicable performance for using virtualized machines, especially on live migration. In this paper, the authors show the latest result of performances of I/O on proposed distributed algorithm. A result of 24 thousands km live-migration demonstrated in SC13 (Supercomputer Conference 2013) is also shown.<br />

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：SPRINGER-VERLAG BERLIN  

Collective communication is of great importance in MPI because the execution time of an MPI program is affected by the communication performance it can gain. Particularly these days, when a cluster system composed of multiple computing nodes has become dominant as a large-scale computing system, the execution time of collective communication affects the total execution time of the MPI program. However, in many implementations of MPI, collective communication is developed to make use of unicast-based communication in a repeated and combined way, which may result in inefficient communication. In this paper, we explore the use of a Software-Defined Network, which was originally expected to help network administrators operate networks through central control in a software-programming manner, to accelerate MPI-Bcast, a basic collective communication used in MPI. The evaluation in this paper indicates that our prototyped SDN-MPI-Bcast is superior to MPI-Bcast in OpenMPI in communication performance. Also, the evaluation implies that SDN-MPI-Bcast is feasible. © 2014 Springer-Verlag Berlin Heidelberg.

DOI： 10.1007/978-3-642-54420-0_86

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Other Link： https://dblp.uni-trier.de/db/conf/europar/europar2013w.html#DashdavaaDYKWIAS13

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)  

Collective communication is of great importance in MPI because the execution time of an MPI program is affected by the communication performance it can gain. Particularly these days, when a cluster system composed of multiple computing nodes has become dominant as a large-scale computing system, the execution time of collective communication affects the total execution time of the MPI program. However, in many implementations of MPI, collective communication is developed to make use of unicast-based communication in a repeated and combined way, which may result in inefficient communication. In this paper, we explore the use of a Software-Defined Network, which was originally expected to help network administrators operate networks through central control in a software-programming manner, to accelerate MPI-Bcast, a basic collective communication used in MPI. The evaluation in this paper indicates that our prototyped SDN-MPI-Bcast is superior to MPI-Bcast in OpenMPI in communication performance. Also, the evaluation implies that SDN-MPI-Bcast is feasible. © 2014 Springer-Verlag Berlin Heidelberg.

DOI： 10.1007/978-3-642-54420-0_86

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Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

We have been involved to research and experiment of Long Distance Live Migration of virtual machines on wide area distributed storage which seems to be a single & shared large POSIX file system. In this paper, we introduce two key technologies in our project; "distributed storage" and "network". Distributed storage technology enables to achieve wide area distributed storage by distributing and sharing both meta data and user data in geographically distributed areas. We summarize network technologies in two parts, that is internal network and external network. Especially, the external network technology is important for Long Distance Live Migration so that external hosts (on the Internet, for example) would communicate with a virtual machine even the case where it would be migrated into geographically remote sites. In this paper, we also introduce the result of our experiment.

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：電子情報通信学会  

クラスタシステムなどの高性能計算環境では，複数のジョブ間でその資源が共有利用される．このような計算環境上で分散並列計算の実行時間を縮減するためには，その環境を構成する計算資源及びネットワーク資源を効率的に割り当てる必要がある．しかし，今日のジョブ管理システム（JMS）の多くは計算資源情報のみを考慮してジョブへの資源配分を決定する．本論文では，この点に着目し，ジョブごとに指定されるユーザの資源要求に基づき，計算資源及びネットワーク資源を考慮した資源割当を実現するためのジョブ管理フレームワークを提案する．技術的には，既存のJMSであるOpen Grid Scheduler/Grid Engine（OGS/GE）に，ネットワークの一元的な動的制御を可能にするOpenFlowを統合させることで実現したフレームワークの実装についてまとめる．本論文の評価では，提案するジョブ管理フレームワーク上に，ネットワークの遅延または帯域を考慮する資源割当ポリシを配備し，ネットワーク資源の割当をジョブごとに制御することでジョブの実行時間を縮減できることを確認した．

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Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

A large amount of scientific data needs to be transferred from one site to another as fast as possible in the computational science field. High-speed data transfer between sites is very important, especially in the Grid computing field; GridFTP has been widely used for bulk data transfer over wide area network. GridFTP achieves greater performance by supporting parallel TCP streams. Using parallel TCP streams improves the throughput of slow-start algorithm and lossy network even on a single path. This research proposes a traffic engineering technique that increases the data transfer performance by using multiple paths simultaneously for the parallel TCP streams. For the purpose, we use Software-Defined Network (SDN) technology and its implementation, OpenFlow. This paper presents the design and implementation of the proposed system and describes the results of the performance evaluation.

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Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

It is focused on distributed storage technologies and backing up data onto remote data centers because of growing sense of disaster recovery for large scale disaster. Now the authors are constructing widely distributed storage environment. This environment is characterized by high performance of random I/O access. Because every site can access to same data, IT services can be continued with live migration technology. In this paper, the authors explain the demonstrations on SC13 and SC14.

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Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

ICT systems are expected to ensure high availability against not only possible failures but also unexpected multiple failures due to wide-scale disaster. It is important to continuous evaluations on the operation through education or training in addition to verification on the design and development. In this paper, we propose a verification platform which enables to arbitrary-generate disasters or failures to evaluate disaster tolerance of the distributed system.

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：Institute of Electrical and Electronics Engineers Inc.  

DOI： 10.1109/ICSEC.2014.6978126

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本稿では，複数大学のコンピュータリソースを相互に接続し，広域分散環境において頑強なデータ基盤を構築するためのアーキテクチャの提案を行う．本アーキテクチャは，多数のコンピュータリソースをもちいて大規模なストレージ空間を実現するクラスタストレージ技術を応用し，広域分散環境で信頼性の高いデータ基盤を実現する．本アーキテクチャによって実現されるデータ基盤は，地理的に離れた3カ所以上の「マルチサイト」から同時にアクセスが可能であり，かつ一カ所での更新がリアルタイムに他サイトに反映されることを特徴とする．同データ基盤は単一の巨大なファイルシステムとしてPOSIX準拠の標準的なアクセス手段を提供し，かつ，ランダムアクセスによるファイル入出力を可能とする．将来的には，地理的に離れた拠点間で仮想OSのライブマイグレーションができることを目指す．

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大規模災害による危機意識の高まりから災害回復（Disaster Recover: DR）を実現するための技術として遠隔地データセンターでのバックアップや分散ストレージに注目が集まっている．現在我々はランダムアクセス性能の高さに特徴のある広域分散ストレージ環境を金沢大学，広島大学，NIIを中心として構築しており，本研究では本環境のI/O性能を評価し，この環境の有用性を示す．

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Advances in Parallel Computing  

On 11 March 2011 JPN suffered a major earthquake. The resulting tsunami caused great loss of life and devastated many buildings, industries, and information services. Similarly, recent flooding in Thailand resulted in the destruction of property and a disruption of services. Thus, it is prudent for information technology infrastructure and services providers to formulate and implement procedures for rapid disaster recovery of key services that become even more critical during catastrophic events. To aid in our understanding of how academic resource centers can positively respond to such events, we have prototyped, developed and deployed GEO (Global Earth Observation) Grid applications on a distributed infrastructure made up of physical clusters contributed by our international colleagues. On top of these clusters, each site was able to host virtual machines, using their choice of virtualization infrastructure. We were able to realize a secure and transparent Inter-Cloud infrastructure through automated translation of virtual machines (e.g., between different hypervisors) and network virtualization. Cloud interoperation enables sharing of virtual machine images by private and public Clouds, i.e. a virtual machine image could be shared by different VM hosting environments including OpenNebula, Rocks, and Amazon EC2. Insights gained through the preliminary experiments indicated the key issue for Inter-Cloud is how we could use technologies for network virtualization. We used OpenFlow for network virtualization to build a secure (isolated) network for Inter-Cloud. © 2013 The Authors.

DOI： 10.3233/978-1-61499-322-3-35

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DOI： 10.1109/JCSSE.2013.6567337

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DOI： 10.1109/ICON.2013.6781934

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Other Link： https://dblp.uni-trier.de/db/conf/icon/icon2013.html#WatashibaKDAIYKT13

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/ICON.2013.6781935

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Other Link： https://dblp.uni-trier.de/db/conf/icon/icon2013.html#IchikawaDAYKS13

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/eScience.2013.15

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Other Link： https://dblp.uni-trier.de/db/conf/eScience/eScience2013.html#LiTXHID13

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/COMPSACW.2013.108

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Other Link： https://dblp.uni-trier.de/db/conf/compsac/compsac2013w.html#WatashibaDAIYKT13

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/COMPSAC.2013.81

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Other Link： https://dblp.uni-trier.de/db/conf/compsac/compsac2013.html#WatashibaHDAIKST13

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DOI： 10.1007/s12626-013-0038-0

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Language：Japanese   Publisher：(公社)全国大学保健管理協会  

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近年，高性能計算資源はクラスタシステムとして構成されていることが主流で，より高性能を求めてますます大規模化する傾向にある．複数の計算ノードがインターコネクトによって相互接続されたクラスタシステムでは，ユーザがより高い実行性能を得るには，できるだけ多数の計算資源を高効率に利用する分散並列処理を行う必要がある．とりわけ，計算ノード間の通信が密な計算では，割り当てられた計算ノード間のネットワーク性能が計算性能に多大な影響を与える．しかし，今日利用できる，計算ノードを管理しユーザジョブの計算要求に応じて，効率的に計算ノードの計算資源を割り当てる役割を担うジョブ管理システムの多くは，計算ノード間のネットワーク，すなわちインターコネクトの効率的利用を考慮した仕組みを有していない．われわれは，そのような視点から，ネットワーク資源も含めた計算資源の適切な管理・割当を行うことができるジョブ管理システムの実現を目的とした研究開発に着手した．本稿では，計算ノード間のインターコネクトを Software-Defined Network (SDN) で制御することにより，計算性能の向上を目的とするジョブ管理システムを提案し，提案システムの有用性についてケーススタディを用いて検討する．High performance computing has been becoming more large-scale and distributed. Today, since the current dominant trend of high-performance computing is cluster system, it tends to be built with more computers for more performance improvement and acceleration. Therefore, the performance of interconnect among computing resources of the cluster plays more important role due to a fact that parallel computation performed on distributed multiple resources requires communication. However, no current Job Management System (JMS) is designed to consider how network resources, that is, interconnects are used in submitting jobs to computing resources of a cluster system. We have started the research and development of network-aware job management system that allocates appropriate set of computing and network resources in an on-demand fashion, based on user-provided resource requirement information. The key feature of our proposed JMS is the integration of Software-Defined Network (SDN) concept into traditional JMS.

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Language：Japanese   Publisher：一般社団法人電子情報通信学会  

本稿では,複数大学のコンピュータリソースを相互に接続し,広域分散環境において頑強なデータ基盤を構築するためのアーキテクチャの提案を行う.本アーキテクチャは,多数のコンピュータリソースをもちいて大規模なストレージ空間を実現するクラスタストレージ技術を応用し,広域分散環境で信頼性の高いデータ基盤を実現する.本アーキテクチャによって実現されるデータ基盤は,地理的に離れた3ヵ所以上の「マルチサイト」から同時にアクセスが可能であり,かつ一ヵ所での更新がリアルタイムに他サイトに反映されることを特徴とする.同データ基盤は単一の巨大なファイルシステムとしてPOSIX準拠の標準的なアクセス手段を提供し,かつ,ランダムアクセスによるファイル入出力を可能とする.将来的には,地理的に離れた拠点間で仮想OSのライブマイグレーションができることを目指す.

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Language：Japanese   Publisher：一般社団法人情報処理学会  

大規模化・分散化傾向にあるクラスタ型計算資源の利用において,ネットワーク性能が計算処理性能に与える影響は大きい.しかし,ユーザジョブの計算要求に応じて計算資源を割り当てるジョブ管理システムの多くは,ネットワーク資源情報を利用せず,CPU やメモリのような計算資源情報に基づいて各ジョブへの割当資源を決定する.本研究ではネットワーク資源と計算資源の情報に基づき,ユーザのジョブ要求に対して最適なネットワークを持つ計算資源を割り当てることができるジョブ管理システムの実現を目指している.本稿では,ネットワークを柔軟に制御することが可能な技術として注目を集めている OpenFlow の機能を応用したジョブ管理システムの概要をまとめるとともに,提案システムの有効性を検証した実験結果について報告する.

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Language：Japanese   Publisher：一般社団法人情報処理学会  

科学全般において大規模な可視化が必用とされ,可視化装置とミドルウェアに注目を集めている.複数のディスプレイで構築するタイルドディスプレイは大規模な可視化を実現する技術であり,ネットワークを通じてアプリケーションやコンテンツを表示することができる.動画配信などの大容量ストリーミングとは異なり,タイルドディスプレイでのアプリケーション表示ではユーザのインタラクションが発生し,その結果を画面に反映することとなるが,ネットワークの遅延,障害がユーザインタラクションに多大な影響をおよぼす.そのためタイルドディスプレイでのユーザインタラクションを考慮したネットワークの制御が必要不可欠となる.先行研究では,SAGE によるタイルドディスプレイと OpenFlow を用い障害検知による冗長経路の変更について取り組んだ.本研究では,ユーザ操作によって生じるデータ転送量の変更に対応するため OpenFlow を用いたフロー制御に取り組み,インタラクティブネスの向上を目指す.

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Language：Japanese   Publisher：一般社団法人電子情報通信学会  

大規模災害による危機意識の高まりから災害回復(Disaster Recover:DR)を実現するための技術として遠隔地データセンターでのバックアップや分散ストレージに注目が集まっている.現在我々はランダムアクセス性能の高さに特徴のある広域分散ストレージ環境を金沢大学,広島大学,NIIを中心として構築しており,本研究では本環境のI/O性能を評価し,この環境の有用性を示す.

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Recently, wide-area distributed computing has been increasingly concerned. Particularly in the scientific research, virtual cluster, which aggregates virtual machines from multiple physical computers to provide a user-dedicated computing environment, has attracted scientists and researchers expectation. In reality, however, no practically available virtual cluster solution has been realized so far. This fact is explained from the difficulty of establishing a network where virtual machines composing a virtual cluster directly communicate and that of installing and configuring software stack as a single cluster system on them. In this paper, we have proposed and prototyped a multi-site virtual cluster deployment system that builds a virtual cluster aggregating virtual machines, each of which is located on a different site. To evaluate the practicality, we have measured the computational performance of a virtual cluster system deployed on a WAN-emulated environment. The result indicates that the virtual cluster provides computational performance enough to perform a parameter-study problem with less data transfer.

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Other Link： http://id.nii.ac.jp/1001/00086045/

Language：Japanese   Publisher：情報処理学会  

データセンタの需要増に伴い、データセンタ内におけるネットワーク機器の消費電力が増加している。OpenFlow技術を用いて、電力量を少なくするパスにトラフィックを集約し、不要なスイッチを休止させる手法を提案する。

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Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

Datacenter is essential for service provider on the Internet. However, energy consumption of ICT equipment is increasing each year. It is important for datacenter administrator to reduce energy consumption of datacenter which contains a large amount of ICT equipment. Improving server machine or cooling facilities of efficiency, network resource consumes more energy. In this paper, We prototyped event-driven OpenFlow controller which finds minumum-power network subsets using Best-fit algorithm and flow contention algorithm. Evaluation results shows that prototype can reduce datacenter network energy consumption.

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近年，仮想計算機 (VM: Virtual Machine) 技術の発達に伴い，仮想クラスタを異なる拠点間で移送する拠点間移送に関心が高まりつつある．しかし，仮想クラスタの移送では，データサイズの大きい VM ディスクイメージを多数転送する必要があるため，移送時間が長くなることが問題である．そこで，本研究においては仮想クラスタを構成する複数の VM ディスクイメージ間には重複内容が多いことに着目し，これらの重複内容の除去を行うことにより，移送時間の削減を図った．具体的には，重複除去の手法として，ローカル重複除去，多段階重複除去の2種類の重複除去手法を提案し，これらを実行するためのプログラムの実装を行った．本研究では，これらの実装したプログラムの処理時間の測定を行い，VM のサイズや個数，使用可能帯域幅などの任意の条件下における仮想クラスタ移送時間の推定式を導出した．この推定式を利用することにより，WAN 実効帯域幅等の条件に応じて，2種類の重複除去手法，および重複除去を行わずに移送する手法の3種類のうち，いずれが移送時間を最短にするものであるかの決定指針を与えることができた．Transferring virtual clusters across different sites has been gathering much attention recently due to the development of virtual machine technology. However, it takes a long time to transfer VM disk images composing a virtual cluster across different sites since the total size of multiple VM disk images is very large. In this study, we proposed an efficient transferring method that reduces the size of transferring data by deduplicating multiple VM disk images composing a virtual cluster. In particular, we have developed two deduplication methods, local deduplication and multistage deduplication. We have evaluated the execution time of the developed duduplication programs, and derived estimating equations of transferring time of virtual cluster under arbitrary conditions.

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IOS PRESS  

On 11 March 2011 JPN suffered a major earthquake. The resulting tsunami caused great loss of life and devastated many buildings, industries, and information services. Similarly, recent flooding in Thailand resulted in the destruction of property and a disruption of services. Thus, it is prudent for information technology infrastructure and services providers to formulate and implement procedures for rapid disaster recovery of key services that become even more critical during catastrophic events. To aid in our understanding of how academic resource centers can positively respond to such events, we have prototyped, developed and deployed GEO (Global Earth Observation) Grid applications on a distributed infrastructure made up of physical clusters contributed by our international colleagues. On top of these clusters, each site was able to host virtual machines, using their choice of virtualization infrastructure. We were able to realize a secure and transparent Inter-Cloud infrastructure through automated translation of virtual machines (e.g., between different hypervisors) and network virtualization. Cloud interoperation enables sharing of virtual machine images by private and public Clouds, i.e. a virtual machine image could be shared by different VM hosting environments including OpenNebula, Rocks, and Amazon EC2. Insights gained through the preliminary experiments indicated the key issue for Inter-Cloud is how we could use technologies for network virtualization. We used OpenFlow for network virtualization to build a secure (isolated) network for Inter-Cloud. © 2013 The Authors.

DOI： 10.3233/978-1-61499-322-3-35

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Other Link： https://dblp.uni-trier.de/db/conf/hpc/hpc2012-1.html#TanakaYTOPWZHPW12

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/COMPSACW.2012.26

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Other Link： https://dblp.uni-trier.de/db/conf/compsac/compsac2012w.html#FuruichiDYIATK12

Publishing type：Research paper (scientific journal)  

DOI： 10.3745/jips.2011.7.4.581

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DOI： 10.11517/jjsai.26.2_117

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J-GLOBAL

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Other Link： http://id.nii.ac.jp/1004/00007736/

Language：Japanese   Publisher：情報処理学会  

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/GRC.2011.6122693

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Other Link： https://dblp.uni-trier.de/db/conf/grc/grc2011.html#YadaI11

Language：Japanese  

CiNii Books

J-GLOBAL

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/GRC.2011.6122667

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Other Link： https://dblp.uni-trier.de/db/conf/grc/grc2011.html#TadaDSIA11

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/GRC.2011.6122611

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Other Link： https://dblp.uni-trier.de/db/conf/grc/grc2011.html#IchikawaDKS11

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s12626-010-0016-8

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Language：Japanese  

近年，大規模データ可視化技術として，タイルドディスプレイが注目されており，その実現技術として SAGE と呼ばれるミドルウェアがスケーラビリティやパフォーマンスの高さから科学研究への応用に期待されている．しかし，SAGE は既存の可視化アプリケーションをそのままでは利用できないという相互運用性に問題がある．本研究では，この問題に対して，可視化アプリケーションを変更することなく，アプリケーションから可視化データを取得し，SAGE によるタイルドディスプレイに表示可能とする手法を提案し，それを実現する SAGE アダプタの実装を行った．本稿では，この SAGE アダプタについて詳しく述べると共に，既存のアプリケーションを用いた動作検証結果を示す．また，実用上十分な性能が得られることを評価結果と共に報告する．Tiled Display has recently gathered wide attention as a possible way of realizing large-scale visualization. In particular, SAGE is a representative middleware to build up such a tiled display; it is highly expected to be utilized for scientific researches due to its scalable and high performance nature. However, SAGE has an interoperability problem that existing visualization applications are not available without modification of the implementation. To tackle this problem, we proposed SAGE adapter, which allows users to utilize the existing visualization applications in SAGE without modification. This paper describes the details of the SAGE adapter, and introduces an example of an application using SAGE adapter. Moreover the paper reports some evaluation results, which indicate that the SAGE adapter has enough performance for practical use.

CiNii Books

J-GLOBAL

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Language：Japanese  

近年，ネットワークを利用するサービスに対する攻撃が増加および多様化しており，NIDS (Network-based Intrusion Detection System) の重要性が高まっている．今日の NIDS にはネットワークの広帯域化に応じた高速な処理が求められており，高性能な NIDS の実現が急務である．このような背景から，本論文ではロードバランサを用いて NIDS の処理を並列化する並列 NIDS の実現を目的とし，高性能なソフトウェアロードバランサを設計，実装する．提案実装では高速なパケットキャプチャおよび転送モジュールである PF RING を利用し，パケット転送処理をマルチスレッドで並列化することで高速なパケット転送を実現する．さらに，本論文の性能評価によって，提案実装におけるパケット転送が 9.8Gbps を超えるスループットを達成し，既存研究のソフトウェアロードバランサで採用されているパケット転送よりも高い性能を持つことを示す．With the increase and diversity of attacks against network services, NIDS (Network-based Intrusion Detection System) has been taking a role of importance. For the traffic analysis of the today&#039;s high-speed network, the demand on high performance NIDS has been increased. From the background, we focus on parallel distributed NIDS that analyzes network traffic on multiple PCs in a high-throughput fashion. In this paper, we design and implement a high performance software-based load balancer that distributes the workload of traffic analysis to multiple commodity PCs. A prototypic implementation of the proposed software-based load balancer has realized high-throughput packet forwarding by multi-threaded processing and PF RING which provides high-speed packet capturing and sending. Our experiments indicate that, packet forwarding in the proposed software-based load balancer has achieved 9.8 Gbps throughput.

CiNii Books

J-GLOBAL

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Language：English  

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Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/GrC.2010.168

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Other Link： https://dblp.uni-trier.de/db/conf/grc/grc2010.html#IchikawaYW10

Publishing type：Research paper (scientific journal)   Publisher：Japan Society for Software Science and Technology  

DOI： 10.11309/jssst.27.4_172

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J-GLOBAL

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/HUMANCOM.2010.5563341

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Language：Japanese   Publishing type：Research paper (international conference proceedings)  

Resource discovery is a fundamental service of the Grid to find out resources suitable for executing user obs. Traditional resource discovery services of the Grid have static structure and centralized or hierarchized, such as Globus MDS. However, with the number of resources composing the Grid increased, this approach has two problems, namely, on dynamic changes of the structure in the Grid and obtaining the latest resource information. To solve these problems, we have been seeking for the possibility of a resource discovery mechanism adopting Peer-to-Peer approach, which is characterized by real-time retrieval of information using overlay networks spanned on physical computational resources. In this paper, we present the preliminary results of our research activities so far. © 2009 IEEE.

DOI： 10.1109/SAINT.2009.68

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Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)  

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Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.cmpb.2008.07.005

Web of Science

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PubMed

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1007/978-3-642-04592-9_34

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Language：Japanese   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE  

Resource discovery is a fundamental service of the Grid to find out resources suitable for executing user obs. Traditional resource discovery services of the Grid have static structure and centralized or hierarchized, such as Globus MDS. However, with the number of resources composing the Grid increased, this approach has two problems, namely, on dynamic changes of the structure in the Grid and obtaining the latest resource information. To solve these problems, we have been seeking for the possibility of a resource discovery mechanism adopting Peer-to-Peer approach, which is characterized by real-time retrieval of information using overlay networks spanned on physical computational resources. In this paper, we present the preliminary results of our research activities so far. © 2009 IEEE.

DOI： 10.1109/SAINT.2009.68

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Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/SAINT.2009.68

J-GLOBAL

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Other Link： https://dblp.uni-trier.de/db/conf/saint/saint2009.html#KokuboIID09

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)  

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Language：English   Publishing type：Research paper (international conference proceedings)  

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Language：Japanese   Publisher：The Institute of Electronics, Information and Communication Engineers  

The Grid allows us to integrate computational resources widely distributed on the Internet to a large-scale computational environment. However, it is still hard to execute applications such computational environment as flexibly as a single cluster system because of the heterogeneity of software components of computational resources composing the Grid and the difficulty of establishing bi-directional connection among computational resources. Motivated by these reasons, we have been working on the development of the technologies which provide users with user-optimal flexible computational environment by combining virtual machine technologies and overlay networking. In this paper, our envisaged virtual cluster is overviewed together with its technical issues. After that, the communication relay mechanism using overlay networking is detailed. We summarize the results of performance test performed on a virtual cluster using the developed communication relay mechanism.

CiNii Books

J-GLOBAL

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Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/SAINT.2008.94

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Other Link： https://dblp.uni-trier.de/db/conf/saint/saint2008.html#KusumotoDITS08

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/GRID.2008.4662800

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Other Link： https://dblp.uni-trier.de/conf/grid/2008

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/eScience.2008.84

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Other Link： https://dblp.uni-trier.de/db/conf/eScience/eScience2008.html#DateMISTF08

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/eScience.2008.40

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Other Link： https://dblp.uni-trier.de/db/conf/eScience/eScience2008.html#HanLIDH08

Language：English   Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/eScience.2008.39

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Other Link： https://dblp.uni-trier.de/db/conf/eScience/eScience2008.html#PhamLIDH08

Language：English   Publishing type：Research paper (other academic)  

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1142/9789812708823_0010

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Language：Japanese   Publishing type：Research paper (other academic)  

J-GLOBAL

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Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

SAGE has been gathering researchers' attention as a visualization technology that enables enormous scientific data in a high-resolution manner. This SAGE is the technology that displays enormous scientific data on a local high-resolution display device through the network streaming of the scientific data from a remote site. Today, this characteristic of SAGE is making the development of collaboration environment where researchers who perform their own scientific research through the sharing and visualization of scientific data active. In this paper, we first summarize and briefly explain these technical issues around SAGE and then clarify the research issues from now on. Subsequently, the interface problem related to window and application operations, which is one of such technical issues, is mentioned and its solution is shown in this paper.

CiNii Books

J-GLOBAL

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/PACRIM.2007.4313191

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Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/PACRIM.2007.4313278

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Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

The development of High-performance computing technology has led to the advancement in computer simulation technology. In the arena of life science, experts have been attempting the combinational and integrated use of such computer simulation programs developed until today with a new perspective to the reveal of biological system. In this paper, we describe a simulation system for understanding biological system, characterized by the use of OPAL. The OPAL allows us to easily make the existent simulation programs a web service in a wrapping manner. Also, OPAL Operation Provider that allows the web service realized with OPAL to utilize Grid function is detailed. After that, we consider the usefulness of the system taking advantage of OPAL.

CiNii Books

J-GLOBAL

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Publishing type：Research paper (international conference proceedings)   Publisher：IEEE Computer Society  

DOI： 10.1109/ccgrid.2006.1630932

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Other Link： https://dblp.uni-trier.de/db/conf/ccgrid/ccgrid2006.html#LiKMIDDSMDWTA06

Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1055/s-0038-1633960

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PubMed

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Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

In these days, biological simulation has been recognized as combinations with simulations at various scales from microscopic to macroscopic, raising our expectation of paradigm shift at computational chemistry. We recognize simulations as programs that calculate on individual time steps repeatedly and then retrieve time continuous results. Thus, a model is proposed for a flow of a time step composed of analysis, monitoring, visualization and data management. We constructed distributed function environment for simulation on OGSA.

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Language：Japanese   Publishing type：Research paper (other academic)  

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Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

A scheduling system that can efficiently complete the comoutation of a problem in the class of parallel and cooperative jobs is now demanded among scientists and researchers. However, many solutions for efficiently completing on the Grid mostly target a class of distributed jobs until today. In this paper, a scheduling system whose information-processing mechanism automatically considers dynamic status of computer resources and a flexible exoression based on users' policy are proposed. And its efficiency is demonstrated by using a brain function analysis application which belongs to class of parallel and coooerative jobs.

CiNii Books

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Language：Japanese   Publisher：Information Processing Society of Japan (IPSJ)  

Scientific data acquired from advanced measurement devices have increased in amount due to the recent development of measurement technologies. To efficiently analyze such data within a realistic time, the Grid is seen as an important computing platform for advancement of science. This paper discusses a Grid-enabled analysis system for brain function. The system enables medical doctors and scientists to analyze a large amount of data acquired from magnetoencephalography, a highly-sophisticated medical device with high efficiency. The feature of this system is in a job-sequence control mechanism based on user's region of interest for data. In this paper, we describe the design and implementation of the system and then evaluate the system qualitatively.

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Language：English   Publishing type：Research paper (other academic)  

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