Ernst Gunnar Gran
+4799644916
T538 Topasbygget Kallerud, Gjøvik
About
Ernst Gunnar Gran is an associate professor at the Department of Information Security and Communication Technology at NTNU, where he conducts research in the intersection between high performance computing (HPC), HPC interconnection networks, enterprise data centre networks, cloud computing, and data-intensive processing in multi-clouds. In addition, Ernst holds a position as an adjunct research scientist at Simula Research Laboratory, where he until Dec. 2016 headed the Cloud department. Currently, Ernst acts as the Scientific Leader of Communication Technologies in the RCN funded infrastructure project eX3 (Experimental Infrastructure for Exploration of Exascale Computing), and he is the deliverable manager of the H2020 project Melodic (Multi-cloud Execution-ware for Large-scale Optimised Data-Intensive Computing). His teaching responsibilities include being the course coordinator of IMT2006 Computer Networks and IMT2007 Network Security.
Ernst received his M.Sc. and Ph.D. degrees in computer science from the Department of Informatics, University of Oslo, in 2007 and 2014, respectively, both theses focusing on different aspects of resource management in high performance interconnection networks. Previous project related work includes heading the RCN funded project ERAC (Efficient and Robust Architecture for Big Data Clouds), and leading the design, implementation and deployment of the multi-homed IP based research testbed NorNet Core. Ernst also has several years of experience as a system administrator and scientific programmer.
Publications
2024
-
Toor, Aafan Ahmad;
Lin, Jia-Chun;
Gran, Ernst Gunnar;
Lee, Ming-Chang.
(2024)
UoCAD: An Unsupervised Online Contextual Anomaly Detection Approach for Multivariate Time Series from Smart Homes.
SciTePress
Academic chapter/article/Conference paper
-
Toor, Aafan Ahmad;
Lin, Jia-Chun;
Gran, Ernst Gunnar;
Lee, Ming-Chang.
(2024)
An Explainable Deep Learning-based Approach for Multivariate Time Series Anomaly Detection in IoT.
IEEE conference proceedings
Academic chapter/article/Conference paper
2022
-
Rocher-González, José;
Gran, Ernst Gunnar;
Reinemo, Sven- Arne;
Skeie, Tor;
Escudero-Sahuquillo, Jesús;
Garcia, Pedro J..
(2022)
Adaptive Routing in InfiniBand Hardware.
IEEE conference proceedings
Academic chapter/article/Conference paper
2021
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2021)
DistTune: Distributed Fine-Grained Adaptive Traffic Speed Prediction for Growing Transportation Networks.
Transportation Research Record
Academic article
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2021)
SALAD: Self-Adaptive Lightweight Anomaly Detection for Real-time Recurrent Time Series.
IEEE conference proceedings
Academic chapter/article/Conference paper
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2021)
How Far Should We Look Back to Achieve Effective Real-Time Time-Series Anomaly Detection?.
Springer
Academic chapter/article/Conference paper
2020
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2020)
ReRe: A Lightweight Real-Time Ready-to-Go Anomaly Detection Approach for Time Series.
IEEE conference proceedings
Academic chapter/article/Conference paper
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2020)
RePAD: Real-Time Proactive Anomaly Detection for Time Series.
Springer
Academic chapter/article/Conference paper
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2020)
Distributed Fine-Grained Traffic Speed Prediction for Large-Scale Transportation Networks based on Automatic LSTM Customization and Sharing.
Springer
Academic chapter/article/Conference paper
2019
-
Dreibholz, Thomas;
Mazumdar, Somnath;
Zahid, Feroz;
Taherkordi, Amirhosein;
Gran, Ernst Gunnar.
(2019)
Mobile Edge as Part of the Multi-Cloud Ecosystem: A Performance Study.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Tasoulas, Evangelos;
Zahid, Feroz;
Gran, Ernst Gunnar;
Begnum, Kyrre;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2019)
Efficient routing and reconfiguration in virtualized HPC environments with vSwitch-enabled lossless networks.
Concurrency and Computation
Academic article
2018
-
Zahid, Feroz;
Taherkordi, Amirhosein;
Gran, Ernst Gunnar;
Skeie, Tor;
Johnsen, Bjørn Dag.
(2018)
A Self-Adaptive Network for HPC Clouds: Architecture, Framework, and Implementation.
IEEE Transactions on Parallel and Distributed Systems
Academic article
2017
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2017)
Efficient network isolation and load balancing in multi-tenant HPC clusters
.
Future Generation Computer Systems
Academic article
-
Peñaranda, Roberto;
Lopez, Pedro;
Gómez, Maria E.;
Gran, Ernst Gunnar;
Skeie, Tor.
(2017)
A Fault-Tolerant Routing Strategy for K-ary N-direct S-indirect Topologies Based on Intermediate Nodes.
Concurrency and Computation
Academic article
2016
-
Peñaranda, Roberto;
Gran, Ernst Gunnar;
Skeie, Tor;
Engracia Gómez, Maria;
Lopez, Pedro.
(2016)
A New Fault-Tolerant Routing Methodology for KNS Topologies.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Tasoulas, Evangelos;
Gran, Ernst Gunnar;
Skeie, Tor;
Johnsen, Bjørn Dag.
(2016)
Fast hybrid network reconfiguration for large-scale lossless interconnection networks.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz Grzegorz;
Johnsen, Bjørn Dag;
Skeie, Tor;
Tasoulas, Evangelos.
(2016)
Compact network reconfiguration in fat-trees.
The Journal of Supercomputing
Academic article
-
Qian, Liu;
Russel, Robert D.;
Gran, Ernst Gunnar.
(2016)
Improvements to the InfiniBand Congestion Control Mechanism.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
2015
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2015)
SlimUpdate: Minimal Routing Update for Performance-Based Reconfigurations in Fat-Trees.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Escudero-Sahuquillo, Jesús;
Gran, Ernst Gunnar;
García, Pedro;
Flich, Jose;
Skeie, Tor;
Lysne, Olav.
(2015)
Efficient and Cost-Effective Hybrid Congestion Control for HPC Interconnection Networks.
IEEE Transactions on Parallel and Distributed Systems
Academic article
-
Tasoulas, Evangelos;
Gran, Ernst Gunnar;
Johnsen, Bjørn Dag;
Begnum, Kyrre;
Skeie, Tor.
(2015)
Towards the InfiniBand SR-IOV vSwitch architecture.
Proceedings IEEE International Conference on Cluster Computing
Academic article
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2015)
Partition-aware routing to improve network isolation in InfiniBand based multi-tenant clusters.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2015)
A weighted fat-tree routing algorithm for efficient load-balancing in InfiniBand enterprise clusters.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
2012
-
Gran, Ernst Gunnar;
Reinemo, Sven-Arne;
Lysne, Olav;
Skeie, Tor;
Zahavi, Eitan;
Shainer, Gilad.
(2012)
Exploring the Scope of the InfiniBand Congestion Control Mechanism.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
2008
-
Gran, Ernst Gunnar;
Reinemo, Svein Arne.
(2008)
Dragon Kill Points: Loot Distribution in Massive Multiplayer Online Role Playing Games.
Association for Computing Machinery (ACM)
Academic chapter/article/Conference paper
Journal publications
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2021)
DistTune: Distributed Fine-Grained Adaptive Traffic Speed Prediction for Growing Transportation Networks.
Transportation Research Record
Academic article
-
Tasoulas, Evangelos;
Zahid, Feroz;
Gran, Ernst Gunnar;
Begnum, Kyrre;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2019)
Efficient routing and reconfiguration in virtualized HPC environments with vSwitch-enabled lossless networks.
Concurrency and Computation
Academic article
-
Zahid, Feroz;
Taherkordi, Amirhosein;
Gran, Ernst Gunnar;
Skeie, Tor;
Johnsen, Bjørn Dag.
(2018)
A Self-Adaptive Network for HPC Clouds: Architecture, Framework, and Implementation.
IEEE Transactions on Parallel and Distributed Systems
Academic article
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2017)
Efficient network isolation and load balancing in multi-tenant HPC clusters
.
Future Generation Computer Systems
Academic article
-
Peñaranda, Roberto;
Lopez, Pedro;
Gómez, Maria E.;
Gran, Ernst Gunnar;
Skeie, Tor.
(2017)
A Fault-Tolerant Routing Strategy for K-ary N-direct S-indirect Topologies Based on Intermediate Nodes.
Concurrency and Computation
Academic article
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz Grzegorz;
Johnsen, Bjørn Dag;
Skeie, Tor;
Tasoulas, Evangelos.
(2016)
Compact network reconfiguration in fat-trees.
The Journal of Supercomputing
Academic article
-
Escudero-Sahuquillo, Jesús;
Gran, Ernst Gunnar;
García, Pedro;
Flich, Jose;
Skeie, Tor;
Lysne, Olav.
(2015)
Efficient and Cost-Effective Hybrid Congestion Control for HPC Interconnection Networks.
IEEE Transactions on Parallel and Distributed Systems
Academic article
-
Tasoulas, Evangelos;
Gran, Ernst Gunnar;
Johnsen, Bjørn Dag;
Begnum, Kyrre;
Skeie, Tor.
(2015)
Towards the InfiniBand SR-IOV vSwitch architecture.
Proceedings IEEE International Conference on Cluster Computing
Academic article
Part of book/report
-
Toor, Aafan Ahmad;
Lin, Jia-Chun;
Gran, Ernst Gunnar;
Lee, Ming-Chang.
(2024)
UoCAD: An Unsupervised Online Contextual Anomaly Detection Approach for Multivariate Time Series from Smart Homes.
SciTePress
Academic chapter/article/Conference paper
-
Toor, Aafan Ahmad;
Lin, Jia-Chun;
Gran, Ernst Gunnar;
Lee, Ming-Chang.
(2024)
An Explainable Deep Learning-based Approach for Multivariate Time Series Anomaly Detection in IoT.
IEEE conference proceedings
Academic chapter/article/Conference paper
-
Rocher-González, José;
Gran, Ernst Gunnar;
Reinemo, Sven- Arne;
Skeie, Tor;
Escudero-Sahuquillo, Jesús;
Garcia, Pedro J..
(2022)
Adaptive Routing in InfiniBand Hardware.
IEEE conference proceedings
Academic chapter/article/Conference paper
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2021)
SALAD: Self-Adaptive Lightweight Anomaly Detection for Real-time Recurrent Time Series.
IEEE conference proceedings
Academic chapter/article/Conference paper
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2021)
How Far Should We Look Back to Achieve Effective Real-Time Time-Series Anomaly Detection?.
Springer
Academic chapter/article/Conference paper
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2020)
ReRe: A Lightweight Real-Time Ready-to-Go Anomaly Detection Approach for Time Series.
IEEE conference proceedings
Academic chapter/article/Conference paper
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2020)
RePAD: Real-Time Proactive Anomaly Detection for Time Series.
Springer
Academic chapter/article/Conference paper
-
Lee, Ming-Chang;
Lin, Jia-Chun;
Gran, Ernst Gunnar.
(2020)
Distributed Fine-Grained Traffic Speed Prediction for Large-Scale Transportation Networks based on Automatic LSTM Customization and Sharing.
Springer
Academic chapter/article/Conference paper
-
Dreibholz, Thomas;
Mazumdar, Somnath;
Zahid, Feroz;
Taherkordi, Amirhosein;
Gran, Ernst Gunnar.
(2019)
Mobile Edge as Part of the Multi-Cloud Ecosystem: A Performance Study.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Peñaranda, Roberto;
Gran, Ernst Gunnar;
Skeie, Tor;
Engracia Gómez, Maria;
Lopez, Pedro.
(2016)
A New Fault-Tolerant Routing Methodology for KNS Topologies.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Tasoulas, Evangelos;
Gran, Ernst Gunnar;
Skeie, Tor;
Johnsen, Bjørn Dag.
(2016)
Fast hybrid network reconfiguration for large-scale lossless interconnection networks.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Qian, Liu;
Russel, Robert D.;
Gran, Ernst Gunnar.
(2016)
Improvements to the InfiniBand Congestion Control Mechanism.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2015)
SlimUpdate: Minimal Routing Update for Performance-Based Reconfigurations in Fat-Trees.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2015)
Partition-aware routing to improve network isolation in InfiniBand based multi-tenant clusters.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Zahid, Feroz;
Gran, Ernst Gunnar;
Bogdanski, Bartosz;
Johnsen, Bjørn Dag;
Skeie, Tor.
(2015)
A weighted fat-tree routing algorithm for efficient load-balancing in InfiniBand enterprise clusters.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Gran, Ernst Gunnar;
Reinemo, Sven-Arne;
Lysne, Olav;
Skeie, Tor;
Zahavi, Eitan;
Shainer, Gilad.
(2012)
Exploring the Scope of the InfiniBand Congestion Control Mechanism.
IEEE (Institute of Electrical and Electronics Engineers)
Academic chapter/article/Conference paper
-
Gran, Ernst Gunnar;
Reinemo, Svein Arne.
(2008)
Dragon Kill Points: Loot Distribution in Massive Multiplayer Online Role Playing Games.
Association for Computing Machinery (ACM)
Academic chapter/article/Conference paper
Teaching
Courses
Outreach
2024
-
Academic lectureToor, Aafan Ahmad; Lin, Jia-Chun; Lee, Ming-Chang; Gran, Ernst Gunnar. (2024) UoCAD: An Unsupervised Online Contextual Anomaly Detection Approach for Multivariate Time Series from Smart Homes. SciTePress 9th International Conference on Internet of Things, Big Data and Security , Angers 2024-04-28 - 2024-04-30
-
Popular scientific lectureHemmatpour, Masoud; Larsen, Tore Heide; Kumar, Nikshubha; Gran, Ernst Gunnar. (2024) In-network monitoring strategies for HPC cloud. International Conference on Advanced Information Networking and Applications 2024-04-17 - 2024-04-19
2023
-
Academic lectureToor, Aafan Ahmad; Lin, Jia-Chun; Gran, Ernst Gunnar; Lee, Ming-Chang. (2023) An Explainable Deep Learning-based Approach for Multivariate Time Series Anomaly Detection in IoT. Frontiers of Information Technology (FIT) 2023-12-11 - 2023-12-12
2020
-
Academic lectureLee, Ming-Chang; Lin, Jia-Chun; Gran, Ernst Gunnar. (2020) Distributed Fine-Grained Traffic Speed Prediction for Large-Scale Transportation Networks based on Automatic LSTM Customization and Sharing. The 26th International European Conference on Parallel and Distributed Computing (EURO-PAR 2020) 2020-08-24 - 2020-08-28
2016
-
Academic lectureZahid, Feroz; Gran, Ernst Gunnar; Skeie, Tor. (2016) Realizing a Self-Adaptive Network Architecture for HPC Clouds. IEEE/ACM The International Conference for High Performance Computing, Networking, Storage and Analysis (SC '16) Doctoral Showcase , Salt Lake City 2016-11-15 -