Alexandru Iosup

University Research Chair and Full Professor, Vrije Universiteit Amsterdam
Associate Professor, TU Delft
Chief Magic Officer, AtLarge team

Research Focus
Massivizing Computer Systems

Contact

Publications
Yardstick: A Benchmark for Minecraft-like Services
  • Jerom van der Sar,
  • Jesse Donkervliet,
  • Alexandru Iosup
ICPE 2019
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Characterization of a Big Data Storage Workload in the Cloud
  • Sacheendra Talluri,
  • Alicja Łuszczak (Databricks B.V., Amsterdam, The Netherlands),
  • Cristina L. Abad (ESPOL, Guayaquil, Ecuador),
  • Alexandru Iosup
ICPE 2019
PDF
Exploring HPC and Big Data Convergence: A Graph Processing Study on Intel Knights Landing
  • Alexandru Uta,
  • Ana Lucia Varbanescu,
  • Ahmed Musaafir,
  • Chris LeMaire,
  • Alexandru Iosup
Cluster 2018 : IEEE International Conference on Cluster Computing
PDF
A Reference Architecture for Datacenter Scheduling
  • Georgios Andreadis,
  • Laurens Versluis,
  • Fabian S. Mastenbroek,
  • Alexandru Iosup
International Conference for High Performance Computing, Networking, Storage and Analysis 2018 (SC18)
PDF
Serverless is More: From PaaS to Present Cloud Computing
  • Erwin van Eyk,
  • Lucian Toader,
  • Sacheendra Talluri,
  • Laurens Versluis,
  • Alexandru Uta,
  • Alexandru Iosup
IEEE Internet Computing, Sep/Oct edition, 2018
PDF
An Analysis of Workflow Formalisms for Workflows with Complex Non-Functional Requirements
  • Laurens Versluis,
  • Erwin van Eyk,
  • Alexandru Iosup
HotCloudPerf 2018
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A SPEC RG Cloud Group's Vision on the Performance Challenges of FaaS Cloud Architectures
  • Erwin van Eyk,
  • Alexandru Iosup,
  • Cristina L. Abad (ESPOL, Ecuador),
  • Johannes Grohmann (U. Wuertzburg, Germany),
  • Simon Eismann (U. Wuertzburg, Germany)
ICPE 2018
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A Trace-Based Performance Study of Autoscaling Workloads of Workflows in Datacenters
  • Laurens Versluis,
  • Mihai Neacsu,
  • Alexandru Iosup
International Symposium on Cluster, Cloud and Grid Computing 2018
PDF
Massivizing Computer Systems: a Vision to Understand, Design, and Engineer Computer Ecosystems through and beyond Modern Distributed Systems
  • Alexandru Iosup,
  • Alexandru Uta,
  • Laurens Versluis,
  • Georgios Andreadis,
  • Erwin van Eyk,
  • Tim Hegeman,
  • Sacheendra Talluri,
  • Vincent van Beek,
  • Lucian Toader
International Conference on Distributed Computing Systems 2018
PDF
Elasticity in Graph Analytics? A Benchmarking Framework for Elastic Graph Processing
  • Alexandru Uta,
  • Sietse Au,
  • Alexey Ilyushkin,
  • Alexandru Iosup
Cluster 2018 : IEEE International Conference on Cluster Computing
PDF
An Experimental Performance Evaluation of Autoscalers for Complex Workflows
  • Alexey Ilyushkin,
  • Ahmed Ali El-Din,
  • Nikolas Herbst,
  • Andre Bauer (U. Wuertzburg, Germany),
  • Allesandro Vittorio Papadopoulos,
  • Dick H.J. Epema,
  • Alexandru Iosup
TOMPECS (Best Paper Nominations from ICPE'17, revised and extended versions). Accepted, in print.
PDF
The SPEC Cloud Group's Research Vision on FaaS and Serverless Architectures
  • Erwin van Eyk,
  • Alexandru Iosup,
  • Simon Seif (SAP SE, Germany),
  • Markus Thoemmes (IBM, Germany)
Second International Workshop on Serverless Computing (WoSC@Middleware 2017)
PDF
Granula: Toward Fine-grained Performance Analysis of Large-scale Graph Processing Platforms.
  • Wing Lung Ngai,
  • Tim Hegeman,
  • Stijn Heldens,
  • Alexandru Iosup
GRADES@SIGMOD/PODS 2017: 8:1-8:6
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An Experimental Performance Evaluation of Autoscaling Policies for Complex Workflows
  • Alexey Ilyushkin,
  • Ahmed Ali El-Din,
  • Nikolas Herbst,
  • Allesandro Vittorio Papadopoulos,
  • Bogdan Ghit,
  • Dick H.J. Epema,
  • Alexandru Iosup
ICPE 2017: 75--86 (Nominated for Best Paper Award)
PDF
Modeling, analysis, and experimental comparison of streaming graph-partitioning policies.
  • Yong Guo,
  • Hassan Chafi,
  • Sungpack Hong,
  • Alexandru Iosup,
  • Dick H.J. Epema
J. Parallel Distrib. Comput. 108: 106-121 (2017)
PDF
The OpenDC Vision: Towards Collaborative Datacenter Simulation and Exploration for Everybody.
  • Alexandru Iosup,
  • Georgios Andreadis,
  • Vincent van Beek,
  • Matthijs Bijman,
  • Erwin van Eyk,
  • Mihai Neacsu,
  • Leon Overweel,
  • Sacheendra Talluri,
  • Laurens Versluis,
  • Maaike Visser
ISPDC 2017 (invited paper)
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Design and Experimental Evaluation of Distributed Heterogeneous Graph-Processing Systems
  • Yong Guo,
  • Ana Lucia Varbanescu,
  • Dick H.J. Epema,
  • Alexandru Iosup
CCGrid 2016: 203-212
PDF
When Game Becomes Life: The Creators and Spectators of Online Game Replays and Live Streaming.
  • Adele Lu Jia,
  • Siqi Shen,
  • Dick H.J. Epema,
  • Alexandru Iosup
TOMCCAP 12(4): 47:1-47:24 (2016)
PDF
LDBC Graphalytics: A Benchmark for Large-Scale Graph Analysis on Parallel and Distributed Platforms
  • Alexandru Iosup,
  • Tim Hegeman,
  • Wing Lung Ngai,
  • Stijn Heldens,
  • Arnau Prat-Perez (UPC, Barcelona, Spain),
  • Thomas Manhardt (Oracle Labs, CA, USA),
  • Hassan Chafi,
  • Mihai Capota,
  • Narayanan Sundaram (Intel Labs, OR, USA),
  • Michael J. Anderson (Intel Labs, OR, USA),
  • Ilie Gabriel Tanase (IBM TJ Watson, NY, USA),
  • Yinglong Xia (Huawei Research America, CA, USA),
  • Lifeng Nai (Georgia Tech, GA, USA),
  • Peter A. Boncz
PVLDB 9(13): 1317-1328 (2016)
PDF
Towards the Next Generation of Large-Scale Network Archives.
  • Stijn Heldens,
  • Ana Lucia Varbanescu,
  • Wing Lung Ngai,
  • Tim Hegeman,
  • Alexandru Iosup
Euro-Par Workshops 2016: 571-579
PDF
Mnemos: Self-Expressive Management of Business-Critical Workloads in Virtualized Datacenters
  • Vincent van Beek,
  • Jesse Donkervliet,
  • Tim Hegeman,
  • Stefan Hugtenburg (TU Delft),
  • Alexandru Iosup
IEEE Computer 48(7): 46-54 (2015)
PDF
Socializing by Gaming: Revealing Social Relationships in Multiplayer Online Games
  • Adele Lu Jia,
  • Siqi Shen,
  • Ruud van de Bovenkamp (TU Delft),
  • Alexandru Iosup,
  • Fernando A. Kuipers,
  • Dick H.J. Epema
TKDD 10(2): 11:1-11:29 (2015)
PDF
V for Vicissitude: The Challenge of Scaling Complex Big Data Workflows
  • Bogdan Ghit,
  • Mihai Capota,
  • Tim Hegeman,
  • Jan Hidders (TU Delft),
  • Dick H.J. Epema,
  • Alexandru Iosup
CCGRID 2014: 927-932
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An Empirical Performance Evaluation of GPU-Enabled Graph-Processing Systems.
  • Yong Guo,
  • Ana Lucia Varbanescu,
  • Alexandru Iosup,
  • Dick H.J. Epema
CCGRID 2015: 423-432
PDF
An Availability-on-Demand Mechanism for Datacenters.
  • Siqi Shen,
  • Alexandru Iosup,
  • Assaf Israel (Technion, Israel),
  • Walfredo Cirne (Google Inc., Mountain View, CA, USA),
  • Danny Raz (Technion, Israel),
  • Dick H.J. Epema
CCGRID 2015: 495-504
PDF
Statistical Characterization of Business-Critical Workloads Hosted in Cloud Datacenters.
  • Siqi Shen,
  • Vincent van Beek,
  • Alexandru Iosup
CCGRID 2015: 465-474
PDF
Area of Simulation: Mechanism and Architecture for Multi-Avatar Virtual Environments.
  • Siqi Shen,
  • Shun-Yun Hu,
  • Alexandru Iosup,
  • Dick H.J. Epema
TOMCCAP 12(1): 8:1-8:24 (2015)
PDF
Toxicity detection in multiplayer online games.
  • Marcus Maertens,
  • Siqi Shen,
  • Alexandru Iosup,
  • Fernando A. Kuipers
NETGAMES 2015: 1-6 (Best Paper Award)
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Massivizing online games using cloud computing: A vision.
  • Alexandru Iosup,
  • Siqi Shen,
  • Yong Guo,
  • Stefan Hugtenburg,
  • Jesse Donkervliet,
  • Radu Prodan
ICME Workshops 2014: 1-4
PDF
Towards Benchmarking IaaS and PaaS Clouds for Graph Analytics.
  • Alexandru Iosup,
  • Mihai Capota,
  • Tim Hegeman,
  • Yong Guo,
  • Wing Lung Ngai,
  • Ana Lucia Varbanescu,
  • Merijn Verstraaten
WBDB 2014: 109-131
PDF
Characterization of Human Mobility in Networked Virtual Environments.
  • Siqi Shen,
  • Niels Brouwers,
  • Alexandru Iosup,
  • Dick H.J. Epema
NOSSDAV 2014: 13
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Modeling Avatar Mobility of Networked Virtual Environments.
  • Siqi Shen,
  • Alexandru Iosup
MMVE@MMSys 2014: 2:1-2:6
PDF
An experience report on using gamification in technical higher education.
  • Alexandru Iosup,
  • Dick H.J. Epema
SIGCSE 2014: 27-32
PDF
Analyzing Implicit Social Networks in Multiplayer Online Games.
  • Alexandru Iosup,
  • Ruud van de Bovenkamp,
  • Siqi Shen,
  • Adele Lu Jia,
  • Fernando A. Kuipers
IEEE Internet Computing 18(3): 36-44 (2014)
PDF
How Well Do Graph-Processing Platforms Perform? An Empirical Performance Evaluation and Analysis.
  • Yong Guo,
  • Marcin Biczak,
  • Ana Lucia Varbanescu,
  • Alexandru Iosup,
  • Claudio Martella,
  • Theodore (Ted) Willke
IPDPS 2014: 395-404
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IaaS Cloud Benchmarking: Approaches, Challenges, and Experience.
  • Alexandru Iosup,
  • Radu Prodan,
  • Dick H.J. Epema
Cloud Computing for Data-Intensive Applications 2014: 83-104 (book chapter)
PDF
Benchmarking graph-processing platforms: a vision.
  • Yong Guo,
  • Ana Lucia Varbanescu,
  • Alexandru Iosup,
  • Claudio Martella,
  • Theodore (Ted) Willke
ICPE 2014: 289-292
PDF
Exploring portfolio scheduling for long-term execution of scientific workloads in IaaS clouds.
  • Kefeng Deng,
  • Junqiang Song,
  • Kaijun Ren,
  • Alexandru Iosup
SC 2013: 55:1-55:12
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A Periodic Portfolio Scheduler for Scientific Computing in the Data Center.
  • Kefeng Deng,
  • Ruben Verboon,
  • Kaijun Ren,
  • Alexandru Iosup
JSSPP 2013: 156-176
PDF
Procedural content generation for games: A survey.
  • Mark Hendrikx,
  • Sebastiaan Meijer,
  • Joeri Van Der Velden,
  • Alexandru Iosup
TOMCCAP 9(1): 1:1-1:22 (2013)
PDF
The Failure Trace Archive: Enabling the comparison of failure measurements and models of distributed systems.
  • Bahman Javadi,
  • Derrick Kondo,
  • Alexandru Iosup,
  • Dick H.J. Epema
J. Parallel Distrib. Comput. 73(8): 1208-1223 (2013)
PDF
Scheduling Jobs in the Cloud Using On-Demand and Reserved Instances.
  • Siqi Shen,
  • Kefeng Deng,
  • Alexandru Iosup,
  • Dick H.J. Epema
Euro-Par 2013: 242-254
PDF
Massivizing Multi-player Online Games on Clouds.
  • Siqi Shen,
  • Alexandru Iosup,
  • Dick H.J. Epema
CCGRID 2013: 152-155
PDF
ExPERT: Pareto-Efficient Task Replication on Grids and a Cloud.
  • Orna Agmon Ben-Yehuda,
  • Assaf Schuster,
  • Artyom Sharov,
  • Mark Silberstein,
  • Alexandru Iosup
IPDPS 2012: 167-178
PDF
An analysis of online match-based games.
  • Yong Guo,
  • Siqi Shen,
  • Otto Visser,
  • Alexandru Iosup
HAVE 2012: 134-139 (Workshops)
PDF
Benchmarking in the Cloud: What It Should, Can, and Cannot Be.
  • Enno Folkerts,
  • Alexander Alexandrov,
  • Kai Sachs,
  • Alexandru Iosup,
  • Volker Markl,
  • Cafer Tosun
TPCTC 2012: 173-188
PDF
The Game Trace Archive.
  • Yong Guo,
  • Alexandru Iosup
NetGames 2012: 1-6
PDF
An Analysis of Provisioning and Allocation Policies for Infrastructure-as-a-Service Clouds.
  • David Villegas,
  • Athanasios Antoniou,
  • Seyed Masoud Sadjadi,
  • Alexandru Iosup
CCGRID 2012: 612-619
PDF
Dynamic Resource Provisioning in Massively Multiplayer Online Games.
  • Vlad Nae,
  • Alexandru Iosup,
  • Radu Prodan
IEEE Trans. Parallel Distrib. Syst. 22(3): 380-395 (2011)
PDF
Grid Computing Workloads.
  • Alexandru Iosup,
  • Dick H.J. Epema
IEEE Internet Computing 15(2): 19-26 (2011)
PDF
On the Performance Variability of Production Cloud Services.
  • Alexandru Iosup,
  • Nezih Yigitbasi,
  • Dick H.J. Epema
CCGRID 2011: 104-113
PDF
A new business model for massively multiplayer online games.
  • Vlad Nae,
  • Alexandru Iosup,
  • Radu Prodan,
  • Thomas Fahringer
ICPE 2011: 271-282
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Identifying, analyzing, and modeling flashcrowds in BitTorrent.
  • Boxun Zhang,
  • Alexandru Iosup,
  • Johan A. Pouwelse,
  • Dick H.J. Epema
Peer-to-Peer Computing 2011: 240-249
PDF
Performance Analysis of Cloud Computing Services for Many-Tasks Scientific Computing
  • Alexandru Iosup,
  • Simon Ostermann (U. Innsbruck),
  • Nezih Yigitbasi,
  • Radu Prodan,
  • Thomas Fahringer,
  • Dick H.J. Epema
IEEE Trans. Parallel Distrib. Syst. 22(6): 931-945 (2011)
PDF
BTWorld: towards observing the global BitTorrent file-sharing network.
  • Maciej Wojciechowski,
  • Mihai Capota,
  • Johan A. Pouwelse,
  • Alexandru Iosup
HPDC 2010: 581-588
PDF
Analysis and modeling of time-correlated failures in large-scale distributed systems.
  • Nezih Yigitbasi,
  • Matthieu Gallet,
  • Derrick Kondo,
  • Alexandru Iosup,
  • Dick H.J. Epema
GRID 2010: 65-72
PDF
Sampling Bias in BitTorrent Measurements.
  • Boxun Zhang,
  • Alexandru Iosup,
  • Johan A. Pouwelse,
  • Dick H.J. Epema,
  • Henk J. Sips
Euro-Par 2010: 484-496
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A Model for Space-Correlated Failures in Large-Scale Distributed Systems.
  • Matthieu Gallet,
  • Nezih Yigitbasi,
  • Bahman Javadi,
  • Derrick Kondo,
  • Alexandru Iosup,
  • Dick H.J. Epema
Euro-Par 2010: 88-100
PDF
The Failure Trace Archive: Enabling Comparative Analysis of Failures in Diverse Distributed Systems.
  • Derrick Kondo,
  • Bahman Javadi,
  • Alexandru Iosup,
  • Dick H.J. Epema
CCGRID 2010: 398-407 (Best Paper Award)
PDF
The performance of bags-of-tasks in large-scale distributed systems.
  • Omer Ozan Sonmez,
  • Nezih Yigitbasi,
  • Saeid Abrishami,
  • Alexandru Iosup,
  • Dick H.J. Epema
HPDC 2010: 49-60
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C-Meter: A Framework for Performance Analysis of Computing Clouds.
  • Nezih Yigitbasi,
  • Alexandru Iosup,
  • Dick H.J. Epema,
  • Simon Ostermann
CCGRID 2009: 472-477
PDF
Trace-based evaluation of job runtime and queue wait time predictions in grids.
  • Omer Ozan Sonmez,
  • Nezih Yigitbasi,
  • Alexandru Iosup,
  • Dick H.J. Epema
HPDC 2009: 111-120
PDF
A performance study of grid workflow engines.
  • Corina Stratan,
  • Alexandru Iosup,
  • Dick H.J. Epema
GRID 2008: 25-32
PDF
On the characteristics of grid workflows.
  • Simon Ostermann,
  • Radu Prodan,
  • Thomas Fahringer,
  • Alexandru Iosup,
  • Dick H.J. Epema
CoreGRID Symposium at Euro-Par 2008
PDF
Efficient management of data center resources for massively multiplayer online games.
  • Vlad Nae,
  • Alexandru Iosup,
  • Stefan Podlipnig,
  • Radu Prodan,
  • Dick H.J. Epema,
  • Thomas Fahringer
SC 2008: 10
PDF
The performance of bags-of-tasks in large-scale distributed systems.
  • Alexandru Iosup,
  • Omer Ozan Sonmez,
  • Shanny Anoep,
  • Dick H.J. Epema
HPDC 2008: 97-108
PDF
The Grid Workloads Archive.
  • Alexandru Iosup,
  • Hui Li,
  • Mathieu Jan,
  • Shanny Anoep,
  • Catalin Dumitrescu,
  • Lex Wolters,
  • Dick H.J. Epema
Future Generation Comp. Syst. 24(7): 672-686 (2008)
PDF
Inter-operating grids through Delegated MatchMaking.
  • Alexandru Iosup,
  • Todd Tannenbaum,
  • Matthew Farrellee,
  • Dick H.J. Epema,
  • Miron Livny
Scientific Programming 16(2-3): 233-253 (2008) (Special Issue with Nominated and Best Paper Awards at SC|07
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TRIBLER: a social-based peer-to-peer system.
  • Johan A. Pouwelse,
  • Pawel Garbacki,
  • Jun Wang,
  • Arno Bakker,
  • Jie Yang,
  • Alexandru Iosup,
  • Dick H.J. Epema,
  • Marcel J. T. Reinders,
  • Maarten van Steen,
  • Henk J. Sips
Concurrency and Computation: Practice and Experience 20(2): 127-138 (2008)
PDF
Inter-operating grids through delegated matchmaking.
  • Alexandru Iosup,
  • Dick H.J. Epema,
  • Todd Tannenbaum,
  • Matthew Farrellee,
  • Miron Livny
SC 2007: 13 (Nominated for Best Paper Award and Best Student Paper Award)
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On the dynamic resource availability in grids.
  • Alexandru Iosup,
  • Mathieu Jan,
  • Omer Ozan Sonmez,
  • Dick H.J. Epema
GRID 2007: 26-33
PDF
Build-and-Test Workloads for Grid Middleware: Problem, Analysis, and Applications.
  • Alexandru Iosup,
  • Dick H.J. Epema
CCGRID 2007: 205-213
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The Characteristics and Performance of Groups of Jobs in Grids.
  • Alexandru Iosup,
  • Mathieu Jan,
  • Omer Ozan Sonmez,
  • Dick H.J. Epema
Euro-Par 2007: 382-393
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2Fast : Collaborative Downloads in P2P Networks.
  • Pawel Garbacki,
  • Alexandru Iosup,
  • Dick H.J. Epema,
  • Maarten van Steen
Peer-to-Peer Computing 2006: 23-30 (Best Paper Award)
PDF
Correlating Topology and Path Characteristics of Overlay Networks and the Internet.
  • Alexandru Iosup,
  • Pawel Garbacki,
  • Johan A. Pouwelse,
  • Dick H.J. Epema
CCGRID 2006: 10
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How are Real Grids Used? The Analysis of Four Grid Traces and Its Implications.
  • Alexandru Iosup,
  • Catalin Dumitrescu,
  • Dick H.J. Epema,
  • Hui Li,
  • Lex Wolters
GRID 2006: 262-269
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GRENCHMARK: A Framework for Analyzing, Testing, and Comparing Grids.
  • Alexandru Iosup,
  • Dick H.J. Epema
CCGRID 2006: 313-320
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Provisioning and Scheduling Resources for World-Wide Data-Sharing Services.
  • Alexandru Iosup,
  • Pawel Garbacki,
  • Dick H.J. Epema
e-Science 2006: 84
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On Grid Performance Evaluation Using Synthetic Workloads.
  • Alexandru Iosup,
  • Dick H.J. Epema,
  • Carsten Franke,
  • Alexander Papaspyrou,
  • Lars Schley,
  • Baiyi Song,
  • Ramin Yahyapour
JSSPP 2006: 232-255
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