Dean H Lorenz

contact information

.
Haifa Research Lab, Haifa, Israel

links

2021

AnchorHash: A Scalable Consistent Hash
Gal Mendelson, Shay Vargaftik, Katherine Barabash, Dean H. Lorenz, Isaac Keslassy, Ariel Orda
IEEE/ACM Transactions on Networking 29(2), 517--528, Institute of Electrical and Electronics Engineers (IEEE), 2021

2020

Cognitive, Multi-Domain Network Slicing: The SliceNet Framework
Dean Lorenz, Pedro Neves, Jose Alcaraz Calero, Qi Wang, Maria Barros Weiss, Anastasius Gavras, Giacomo Bernini, Pietro G. Giardina, Navid Nikaein, Fernando Agraz, Albert Pag\`es, Dean Lorenz, Konstantinos Koutsopoulos, Ciriaco Angelo, Thuy Truong, Cristian Patachia-Sultanoiu, Marius Iordache, Imen Grida Ben Yahia, George Agapiou, Ricardo Figueiredo, Mark Roddy, Ana Aleixo
2020

A QoE-oriented Cognition-based Management System for 5G Slices: The SliceNet Approach
Dean Lorenz, Albert Pag\`es, Fernando Agraz, Salvatore Spadaro, Rafael Montero, Xenofon Vasilakos, Nasim Ferdosian, Navid Nikaein, Dean Lorenz, Kenneth Nagin, Marouane Mechteri, Yosra Ben Slimen, Rui Pedro, Guilherme Cardoso, Pedro Neves, Nuno Henriques, Qi Wang, Jos\'e M. Alcaraz Calero, Antonio Matencio Escolar, Pablo Salva, Enrique Chirivella Perez, Ricardo Marco Alaez
2020

Integrated Methodology to Cognitive Network Slice Management in Virtualized 5G Networks
Xenofon Vasilakos, Navid Nikaein, Dean H. Lorenz, Berkay Koksal, Nasim Ferdosian
arXiv preprint arXiv:2005.04830, 2020
Abstract virtual network, use case, software deployment, service management, service level, distributed computing, computer science, cognitive network, boosting, anomaly detection

2019

AIOps for a Cloud Object Storage Service
Anna Levin, Shelly Garion, Elliot K Kolodner, Dean H Lorenz, Katherine Barabash, Mike Kugler, Niall McShane
2019 IEEE International Congress on Big Data (BigDataCongress), pp. 165-169, IEEE
Abstract

Estimating client QoE from measured network QoS
Kenneth Nagin, Andre Kassis, Dean H. Lorenz, Katherine Barabash, Eran Raichstein
Proceedings of the 12th ACM International Conference on Systems and Storage - SYSTOR 19, 2019
quality of service, control engineering, computer science, computer network

Enable advanced QoS-aware network slicing in 5G networks for slice-based media use cases
Qi Wang, Jose Alcaraz-Calero, Ruben Ricart-Sanchez, Maria Barros Weiss, Anastasius Gavras, Navid Nikaein, Xenofon Vasilakos, Bernini Giacomo, Giardina Pietro, Mark Roddy, Michael Healy, Paul Walsh, Thuy Truong, Zdravko Bozakov, Konstantinos Koutsopoulos, Pedro Neves, Cristian Patachia-Sultanoiu, Marius Iordache, Elena Oproiu, Imen Grida Ben Yahia, Ciriaco Angelo, Cosimo Zotti, Giuseppe Celozzi, Donal Morris, Ricardo Figueiredo, Dean Lorenz, Salvatore Spadaro, George Agapiou, Ana Aleixo, Cipriano Lomba
IEEE Transactions on Broadcasting, 1-10, 2019
ehealth, use case, telecommunications, slicing, quality of service, computer science, computer network

2018

AnchorHash: A Scalable Consistent Hash
Gal Mendelson, Shay Vargaftik, Katherine Barabash, Dean H. Lorenz, Isaac Keslassy, Ariel Orda
arXiv preprint arXiv:1812.09674, 2018
Abstract single core, scalability, parallel computing, memory footprint, mathematics, implementation, hash function, distributed data store, discrete mathematics, consistent hashing, byte

SliceNet: Cognitive Slice Management Framework for Virtual Multi-Domain 5G Networks
Dean H. Lorenz, V. Perelman, Eran Raichstein, Katherine Barabash, Aidan Shribman
Proceedings of the 11th ACM International Systems and Storage Conference on , pp. 129-129, 2018
cryptocurrency, blockchain, scalability, cognition, distributed computing, computer science

SliceNet: End-to-End Cognitive Network Slicing and Slice Management Framework in Virtualised Multi-Domain, Multi-Tenant 5G Networks
Qi Wang, Jose Alcaraz-Calero, Maria Barros Weiss, Anastasius Gavras, Pedro Miguel Neves, Rui Cale, Giacomo Bernini, Gino Carrozzo, Nicola Ciulli, Giuseppe Celozzi, Angelo Ciriaco, Anna Levin, Dean Lorenz, Katherine Barabash, Navid Nikaein, Salvatore Spadaro, Donal Morris, Joannis Chochliouros, Yiorgos Agapiou, Cristian Patachia, Marius Iordache, Elena Oproiu, Cipriano Lomba, Ana Cristina Aleixo, Alberto Ro-Drigues, Ger Hallissey, Zdravko Bozakov, Konstantinos Koutsopoulos, Paul Walsh
2018 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB), pp. 1-5
Abstract cognitive network, quality of experience, end to end principle, use case, slicing, public private partnership, architecture, software, systems engineering, computer network, computer science

Heterogeneous Resource Reservation
Ofer Biran, David Breitgand, Ilyas Iyoob, Dean Lorenz, Michael Masin, Eran Raichstein, Avi Weit
IEEE International Conference on Cloud Engineering 2018 (IC2E'18), pp. 141--147, IEEE
Abstract

Hierarchical Load Balancing as a Service for federated Cloud networks
Levin, Anna and Lorenz, Dean and Merlino, Giovanni and Panarello, Alfonso and Puliafito, Antonio and Tricomi, Giuseppe
Computer Communications129, 125--137, Elsevier, 2018
Abstract

2017

CogNETive: insights and visualization for operations@scale
Dean Lorenz, Eran Raichstein, Katherine Barabash, Hillel Kolodner, Liran Schour, Shelly Garion
SYSTOR '17 Proceedings of the 10th ACM International Systems and Storage Conference, 2017
Abstract

Network Monitoring in Federated Cloud Environment
A Levin, K Dorfman, D Lorenz, S Afchain, P Massonet
Smart Computing (SMARTCOMP), 2017 IEEE International Conference on

2016

Composite-Path Switching
Shay Vargaftik, Katherine Barabash, Yaniv Ben-Itzhak, Ofer Biran, Isaac Keslassy, Dean H. Lorenz, Ariel Orda
Proceedings of the 12th International on Conference on emerging Networking EXperiments and Technologies, pp. 329-343, ACM, 2016
Abstract http://webee.technion.ac.il/~isaac/p/conext16_composite.pdf

Optics in Data Centers: Adapting to Diverse Modern Workloads
hay Vargaftik, Isaac Keslassy, Ariel Orda, Katherine Barabash, Yaniv Ben-Itzhak, Ofer Biran, Dean Lorenz
SYSTOR '16 Proceedings of the 9th ACM International on Systems and Storage Conference, pp. 28, ACM, 2016
Abstract

Over the recent years we witness a massive growth of cloud usage, accelerated by new types of 'born-to-the-cloud' workloads. These new types of workloads are increasingly multi-component, dynamic and often present highly intensive communication patterns. Massive innovation of Data Center Network (DCN) technologies is required to support the demand, giving raise to new network topologies, new network control paradigms, and management models. One particularly promising technology candidate for improving the DCN efficiency is Optical Circuit Switching (OCS). Several hybrid solutions combining OCS with the traditional Electronic Packet Switching (EPS) have been proposed [1, 2], aiming to take advantage of the benefits of the OCS technology (e.g., high bandwidth, low latency and power consumption) while leveling out its shortcomings (e.g., slow reconfiguration time, integration with IP fabric). The first comprehensive work advocating OCS for DCN [1] considered HPC workloads with semi-static communication patterns. Follow up works, such as Helios [2], proposed new ways for identifying heavy flows, heuristics for computing the circuits configuration, and control hooks for dispatching the traffic over EPS and OCS paths. In yet newer works, e.g. [3], further advances were made -- supporting richer sets of communication patterns, employing Software Defined Networking (SDN) to steer the traffic and to achieve more reactive control planes in anticipation for faster OCS capabilities, and more. We observe that in hybrid solutions, the basic approach remains the same -- the network is partitioned between the two separate fabrics, one based on OCS and one based on EPS, so that each network flow is handled by one of the fabrics, depending on its properties. In this work, we present a new architecture where optical circuitry does not merely augment the EPS but is properly integrated with it into a coherently managed unified fabric. Our approach is based on understanding that modern workloads impose diverse traffic demands. Specifically, we identify the abundance of few-to-many and many-to-few communication patterns with multiple dynamic hot spots and observe that such traffic is better served by tighter integration of OCS and EPS achieved through introducing composite paths across the OCS-EPS boundaries. As a preliminary proof of concept, we have evaluated our architecture and compared it to the previously proposed hybrid solutions, considering the known uniform and skewed, as well as few-to-many and many-to-few demand models. For each traffic pattern, we evaluate both whether it can be met by each of the solutions and, if yes, the resulting link utilization. Our preliminary results show a significant improvement in both these metrics -- the feasibility and the link utilization. Looking forward, we plan to expand this research and explore a new thread of opportunities for leveraging the reconfiguration capabilities of contemporary OCS, posing it as a viable DCN technology. This research is partially supported by the European Communitys Seventh Framework Programme (FP7/2001-2013) under grant agreement no. 619572 (COSIGN Project).

2015

Cloud services brokering for elastic workloads
Ofer Biran, Dean H. Lorenz, Eran Reichstein, and Avi Weit
Proceedings of the 8th ACM International Systems and Storage Conference (SYSTOR '15), 2015
Abstract

2011

Guaranteeing high availability goals for virtual machine placement
Eyal Bin, Ofer Biran, Odellia Boni, Erez Hadad, Eliot K. Kolodner, Yosef Moatti, Dean Lorenz
2011 31st International Conference on Distributed Computing Systems
Abstract

2010

Virtual appliance content distribution for a global infrastructure cloud service
Amir Epstein, Dean H Lorenz, Ezra Silvera, Inbar Shapira
INFOCOM, 2010 Proceedings IEEE, pp. 1--9, IEEE
Abstract

2009

IP mobility to support live migration of virtual machines across subnets
Silvera, Ezra and Sharaby, Gilad and Lorenz, Dean and Shapira, Inbar
Proceedings of SYSTOR 2009: The Israeli Experimental Systems Conference, pp. 13
Abstract

2006

Efficient QoS partition and routing of unicast and multicast
Lorenz, Dean H and Orda, Ariel and Raz, Danny and Shavitt, Yuval
IEEE/ACM Transactions on Networking 14(6), 1336--1347, IEEE, 2006
Abstract

2004

QoS routing and partitioning in networks with per-link performance-dependent costs
Dean H Lorenz, ×“×™×Ÿ ×”×¨××œ ×œ×•×¨× ×¥
Technion-Israel Institute of Technology, Faculty of Electrical Engineering, 2004

2003

Optimal partition of QoS requirements for many-to-many connections
Lorenz, Dean H and Orda, Ariel and Raz, Danny
INFOCOM 2003. Twenty-Second Annual Joint Conference of the IEEE Computer and Communications. IEEE Societies, pp. 1670--1679
Abstract

2002

DYNAMO - DirectorY, Net Archiver and MOver
Mark Silberstein, Michael Factor, Dean H. Lorenz
grid computing, pp. 256-267, 2002
Abstract directory information tree, gridftp, directory structure, file size, directory, tree, file system, architecture, real time computing, distributed computing, computer science

DYNAMO-DirectorY, Net Archiver and MOver
M Silberstein, M Factor, D Lorenz
International Workshop on Grid Computing, pp. 256--267, Springer, 2002
Abstract http://www.springerlink.com/index/TWCPGF951QQNLALF.pdf

Optimal partition of QoS requirements on unicast paths and multicast trees
Lorenz, Dean H and Orda, Ariel
IEEE/ACM Transactions on Networking (TON) 10(1), 102--114, IEEE Press, 2002
Abstract

2001

How good can IP routing be
Dean H Lorenz, Ariel Orda, Danny Raz, Yuval Shavitt
DIMACS Rep17, 2001

How good can IP routing be?
Lorenz, Dean H and Orda, Ariel and Raz, Danny and Shavitt, Yuval
DIMACS Rep17, 2001
Abstract

A simple efficient approximation scheme for the restricted shortest path problem
Lorenz, Dean H and Raz, Danny
Operations Research Letters 28(5), 213--219, Elsevier, 2001
Abstract

1998

QoS routing in networks with uncertain parameters
Lorenz, Dean H and Orda, Ariel
IEEE/ACM Transactions on Networking (TON) 6(6), 768--778, IEEE Press, 1998
Abstract

1996

A methodology for processor implementation verification
D Levin, D Lorenz, S Ur
FMCAD 96: Int, 1996

Year Unknown

Reporting Grid Services (Re GS) Specification draft-ggf-ogsa-regs-0.3.
Yariv Aridor, Dean Lorenz, Benny Rochwerger, Bill Horn, Hany Salem
0

Cooperative cost sensitive IP routing
Lorenz, Dean H and Orda, Ariel and Raz, Danny and Shavitt, Yuval
DH Lorenz, A Orda, D Raz, Y Shavitt, 0

Projects and Groups

Technical Areas

Algorithms and Theory

Dean H Lorenz gen_feedback_link(leftr, rightr);