TU Delft
 
Alexandru IOSUP
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 Name Dr. Alexandru Iosup
 Position  
Assistant Professor (Universitair Docent) with the Parallel and Distributed Systems (PDS) Group of the Faculty of Engineering, Mathematics and Computer Science (EWI), TU Delft.
 
 Contact  
A.Iosup@tudelft.nl
 
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Around the world...

 
phone
+31 (0)15 278 4433  
fax
+31 (0)15 2786632
Dial the 0 in "(0)" if calling from inside the Netherlands.
 
address
TU Delft, Room HB07.050
Mekelweg 4, 2628 CD, Delft
The Netherlands
 
P.O. Box
P.O. Box 5031, 2600 GA Delft
the Netherlands
 
route
How to reach my office
 
 
 Quick links
/---------------------- click to go directly to the topic ----------------------\
Community Service Gaming Research Cloud Computing Research Grid Computing Research
P2P Research Grid Workloads Archive Failure Trace Archive Performance Evaluation Tools
/---------------------- selected news items (click for all items) ----------------------\
[20-08-2014] Invited Talk at Fifth Cloud Control Workshop (CCW), Moelle, Sweden, with work on big data and cloud computing Clouds and big data: between efficient datacentres and demanding users, PDF [4MB]
[06-08-2014] Keynote Talk at Fifth Workshop on Big Data Benchmarking (WBDB 2014), Potsdam, Germany, with work on big data and cloud computing A TU Delft Perspective on Benchmarking Big Data in the Data Center, PDF [6.5MB]
[16-06-2014] Awarded Teacher of the Year 2014 of the Computer Science Department and, more prestigiously, of the Faculty of Electrical Engineering, Mathematics, and Computer Science. Thanks, team!
Teacher of the Year 2014, Faulty of Electrical Engineering, Mathematics, and Computer Science, TU Delft Teacher of the Year 2014, Faulty of Electrical Engineering, Mathematics, and Computer Science, TU Delft
[14-05-2014] Invited lecture for the Second ISO/IEC JTC 1 (Study Group on Big Data (SGBD)), Amsterdam, NL, with work on cloud computing and big data Big Data in the Cloud: Enabling the Fourth Paradigm by Matching SMEs with Datacenters, PDF
[15-04-2014] Invited article for the First International Workshop on Cloud Gaming Systems and Networks (C-Game 2014), with ICME 2014 -- work on cloud computing and gaming Massivizing Online Games Using Cloud Computing: A Vision, PDF
[03-04-2014] Lecture at the Linked Data Benchmark Council's Fourth TUC Meeting 2014, with work on big data Lecture on Benchmarking Graph-Processing Platforms, PDF [1.5MB]
[10-03-2014] Accepted article for the IEEE/ACM CCGRID (SCALE Challenge 2014), with work on cloud computing and big data V for Vicissitude: The Challenge of Scaling Complex Big Data Workflows, PDF. Update 27-05-2014: We won the challenge!
[06-03-2014] Lecture at the ACM Technical Symposium on Computer Science Education (SIGCSE 2014), with work on gamification Lecture on An Experience Report on Using Gamification in Technical Higher Education, PDF [1.5MB]
[18-02-2014] Accepted article for the ACM SIGMETRICS Conference on Measurement and Modeling of Computer Systems (SIGMETRICS 2014), with work on cloud computing and big data Balanced Resource Allocations Across Multiple Dynamic MapReduce Clusters, PDF
[03-02-2014] Accepted article for the ACM Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2014), with work on gaming Characterization of Human Mobility in Networked Virtual Environments, PDF
[01-02-2014] Accepted article for IEEE Internet Computing, with work on gaming <----> An Analysis of Implicit Social Networks in Multiplayer Online Games, PDF
[01-02-2014] Accepted article for ACM/SPEC International Conference on Performance Engineering, Work-in-Progress (ICPE'14 - WiP), with work on big data and cloud computing Benchmarking Graph-Processing Platforms: A Vision, PDF
[31-01-2014] Accepted article for the Springer MultiMedia Systems Journal (MMSJ), with work on gaming and cloud computing SLA-based operations of massively multiplayer online games in clouds, PDF
[24-01-2014] Extra lecture for top students in Computer Organization, (1st-year B.Sc.), at TU Delft, NL, "Introduction to Cloud Computing" with work on cloud computing Introduction to Cloud Computing, PDF [2.5 MB] (Update January 2014)
[17-12-2013] Lecture at the Imperial College of London, the UK, "Scheduling in IaaS Cloud Computing Environments: Anything New?" with work on cloud computing and big data Scheduling in IaaS Cloud Computing Environments: Anything New?, PDF [3 MB] (Update December 2013)
[07-12-2013] Accepted article for the IEEE International Parallel and Distributed Computing Symposium (IPDPS 2014), with work on big data and cloud computing How Well do Graph-Processing Platforms Perform?
An Empirical Performance Evaluation and Analysis, PDF [0.25MB]
[19-11-2013] Lecture at SC|13 (here), "Exploring Portfolio Scheduling for Long-Term Execution of Scientific Workloads in IaaS Clouds" with work on cloud computing Exploring Portfolio Scheduling for Long-Term Execution of Scientific Workloads in IaaS Clouds, PDF [1.75 MB] (Update June 2013)
[17-11-2013] Panel at MTAGS 2013 (workshop with SC|13), "Many-Task Computing meets Big Data" with work on cloud computing
[17-11-2013] Lecture at MTAGS 2013 (workshop with SC|13), "On Many-Task Big Data Processing: From GPUs to Clouds" with work on cloud computing On Many-Task Big Data Processing: From GPUs to Clouds, PDF [2.0 MB]
[17-11-2013] Invited paper at the 6th Workshop on Many-Task Computing on Grids and Supercomputers (MTAGS 2013), held with SC with work on big data and cloud computing -
[12-10-2013] Accepted article for the ACM Technical Symposium on Computer Science Education (SIGCSE 2014), with work on gamification An Experience Report on Using Gami?cation in Technical Higher Education, PDF [0.5MB]
[11-08-2013] Accepted article for the IEEE International Conference on Big Data (BigData 2013), with work on big data and cloud computing -.
[10-08-2013] Sietse Au joins our team. Welcome!
[11-07-2013] Accepted article for the ACM/IEEE Conference on High Performance Computing (SC 2013), with work on cloud computing -.
[03-07-2013] Marcin Biczak completes his MSc thesis project, with work on big data and cloud computing. Congratulations!
[10-06-2013] Lecture at the Umeå University, Sweden, "Scheduling in IaaS Cloud Computing Environments: Anything New?" with work on cloud computing and big data Scheduling in IaaS Cloud Computing Environments: Anything New?, PDF [2.5 MB] (Update June 2013)
[06-06-2013] Lecture at Technion, Haifa, Israel, "A TU Delft View on Big Data Processing and Preservation" with work on cloud computing and big data A TU Delft View on Big Data Processing and Preservation, PDF [2.5 MB] (Update June 2013)
[05-06-2013] Lecture at the Hebrew University of Jerusalem, Israel, "Scheduling in IaaS Cloud Computing Environments: Anything New?" with work on cloud computing and big data Scheduling in IaaS Cloud Computing Environments: Anything New?, PDF [2.5 MB] (Update June 2013)
[03-06-2013] Education Named in Top-3 educators in the Teacher of the Year election for Computer Science at TU Delft. The best this year were Cees Witteveen and Tomas Klos (winner last year). An unexpected and new honor and challenge.
[03-06-2013] Lecture at Intel, Haifa, Israel, "IaaS Cloud Benchmarking: Aproach, Challenges, and Experience" (updated with details of resource consumption, GPU+CPU workloads, etc.) with work on cloud computing IaaS Cloud Benchmarking: Approach, Challenges, and Experience, PDF [5 MB] (Intel-oriented presentation)
[03-06-2013] Lecture at Haifux Haifa Linux Meeting, Haifa, Israel, "OpenTTD@large or Massivizing Social Games: Distributed Computing Challenges and High Quality Time" with work on gaming Massivizing Social Games: Distributed Computing Challenges and High Quality Time, PPT [10MB] (Haifux-oriented presentation)
[31-05-2013] Final technical report of SPEC Research Group, with work on cloud computing Cloud Usage Patterns: A Formalism for the Description of Cloud Usage Scenarios, PDF [3.5MB] (Update May 2013) Cloud Usage Patterns: A Formalism for the Description of Cloud Usage Scenarios, Web Site
[30-05-2013] Lecture at IBM Research Labs, Haifa, Israel, "IaaS Cloud Benchmarking: Aproach, Challenges, and Experience" (updated) with work on cloud computing IaaS Cloud Benchmarking: Approach, Challenges, and Experience, PDF [4.5 MB] (Update May 30, 2013)
[27-05-2013] Lecture at Technion, Haifa, Israel, "Gamification: Playful Teaching for Generation-X/-Y/-Z/..." with work on gaming and teaching techniques Gamification: Playful Teaching for Generation-X/-Y/-Z/..., PPT [8.5MB] (Update May 2013) Gamification: Playful Teaching for Generation-X/-Y/-Z/..., PPT [2MB] (Update May 2013)
[24-05-2013] Lecture at JSSPP'13, IPDPS 2013, Boston, MA, USA.: "A Periodic Portfolio Scheduler for Scientific Computing in the Data Center" with work on cloud computing A Periodic Portfolio Scheduler for Scientific Computing in the Data Center, PDF [0.7 MB] (Update May 2013)
[20-05-2013] Lecture at IBM T.J. Watson, Yorktown Heights, NY, USA, "A TU Delft View on Big Data Processing and Preservation" with work on cloud computing and big data A TU Delft View on Big Data Processing and Preservation, PDF [2.5 MB] (Update May 2013)
[20-05-2013] Lecture at IBM T.J. Watson, Yorktown Heights, NY, USA, "Massivizing Social Games: Distributed Computing Challenges and High Quality Time" with work on gaming Massivizing Social Games: Distributed Computing Challenges and High Quality Time, PPT [10MB] (Update May 2013)
[20-05-2013] Lecture at IBM T.J. Watson, Yorktown Heights, NY, USA, "IaaS Cloud Benchmarking: Aproach, Challenges, and Experience" with work on cloud computing IaaS Cloud Benchmarking: Approach, Challenges, and Experience, PDF [4.5 MB] (Update May 2013)
[09-05-2013] Lecture at Technion, Haifa, Israel, "Massivizing Social Games: Distributed Computing Challenges and High Quality Time" with work on gaming Massivizing Social Games: Distributed Computing Challenges and High Quality Time, PPT [18MB] (Update May 2013) Massivizing Social Games: Distributed Computing Challenges and High Quality Time, PPT [10MB] (Update May 2013)
[08-05-2013] Our article for the 19th International European Conference on Parallel and Distributed Computing (Euro-Par 2013), with work on cloud computing and gaming - receives positive reviews. Congratulations, Siqi!
[08-05-2013] Accepted article for the ACM Cloud and Autonomic Computing Conference (CAC 2013), with work on cloud computing and gaming - receives positive reviews. Congratulations, Vlad!
[07-05-2013] Lecture at Technion, Haifa, Israel,"IaaS Cloud Benchmarking: Aproach, Challenges, and Experience" with work on cloud computing IaaS Cloud Benchmarking: Approach, Challenges, and Experience, PPT [10MB] (Update April 2013) IaaS Cloud Benchmarking: Approach, Challenges, and Experience, PDF [4.5 MB] (Update April 2013)
[26-04-2013] New technical report of the Parallel and Distributed Systems Group at TU Delft, with work on cloud computing (large-scale graph processing): How Well do Graph-Processing Platforms Perform? An Empirical Performance Evaluation and Analysis: Extended Report, PDS-2013-004, PDF [0.5MB]
[25-04-2013] New technical report of SPEC Research Group, with work on cloud computing Cloud Usage Patterns: A Formalism for the Description of Cloud Usage Scenarios, PDF [3.5MB] (Update April 2013)
[24-04-2013] We will host ACM/SPEC ICPE 2016, Delft, the Netherlands! Research and industry tracks, workshops,tutorials, Doctoral Symposium (new), Research and industry panel (new), broader engagement (new), etc. See you in Delft in 2016!
[20-04-2013] Keynote Talk at HotTopiCS, ACM/SPEC ICPE 2013, Prague, Czech Republic, with work on cloud computing IaaS Cloud Benchmarking: Approach, Challenges, and Experience, PDF [5MB] (Update April 2013)
[03-04-2013] Workshop at TU Delft's EEMCS Education Day 2013 about work on using gaming for education (gamification) -
[02-04-2013] Talk at Game Ontwerp 2013, U. Utrecht, NL about work on cloud computing and gaming -
[18-03-2013] Accepted paper for the 17th Workshop on Job Scheduling Strategies for Parallel Processing (JSSPP'13), with work on cloud computing -
[02-03-2013] Accepted paper for the Doctoral Symposium at the IEEE/ACM CCGrid 2013, with work on cloud computing and gaming - . Congrats, Alex Olteanu!
[02-03-2013] Accepted paper for the Doctoral Symposium at the IEEE/ACM CCGrid 2013, with work on cloud computing and gaming - . Congrats, Siqi Shen!
[02-03-2013] Accepted paper for the Doctoral Symposium at the IEEE/ACM CCGrid 2013, with work on cloud computing and big data processing - . Congrats, Bogdan Ghit!
[19-02-2013] Accepted paper for the Journal of Parallel and Distributed Computing (JPDC), with work on the Failure Trace Archive -
[06-02-2013] Accepted paper at the 4th ACM/SPEC International Conference on Performance Engineering (ICPE 2013), track Work in Progress, with work on gaming -
[09-01-2013] Invited paper at the 5th International Conference on COMmunication Systems and NETworkS (COMSNETS 2013) with work on gaming -
[12-12-2012] Received my Dutch pedagogical qualifications for teaching at university level, see A. Iosup's Dutch University Teaching Qualification page my UTQ (BKO) page
[07-12-2012] Keynote at Grid5000 Winter School, Nantes, FR, with work on cloud computing IaaS Cloud Resource Management: an Experimental View from TU Delft, PPT [9.5MB]
[20-11-2012] Talk at Dagstuhl Seminar 12472 Is the Future of Preservation Cloudy?, with work on archives and cloud computing Data preservation + clouds: Logging and Preserving the Entire History of Distributed Systems, PDF [9.5MB]
[12-11-2012] Award Talk at MTAGS, ACM Supercomputing 2012, Salt Lake City, Utah, USA, with work on cloud computing IaaS Cloud Benchmarking: Approach, Challenges, and Experience, PDF [9.5MB]
[05-11-2012] Invited paper at the 5th Workshop on Many-Task Computing on Grids and Supercomputers (MTAGS 2012), held with SC with work on cloud computing -
[04-11-2012] Updated A. Iosup's teaching page teaching page.
[04-11-2012] Added 3 sample courses for my IN4392 Cloud Computing course, see my teaching page:  Introduction to Cloud Computing,  Multi-Tenancy and Virtualization,  Cloud Programming Models. This course is gamified.
[04-11-2012] Added sample courses for my TI1400 Computer Organization course, see my teaching page:  The I/O System,  Advanced (Large-Scale) Computer Systems. This course is gamified.
[04-11-2012] Updated A. Iosup's M.Sc. projects page M.Sc. projects page.
[19-10-2012] Accepted paper at the 11th International Workshop on Network and Systems Support for Games (NetGames 2012), with work on gaming. -
[19-10-2012] Accepted short paper at the 11th International Workshop on Network and Systems Support for Games (NetGames 2012), with work on gaming. -
[21-08-2012] Open letter to Google, about Google Scholar Please reinstate subject area selection in Google Scholar (an open letter to Google).
[13-08-2012] Accepted paper at the 5th Int'l. Workshop on Massively Multiuser Virtual Environments (MMVE 2012), with work on gaming. - Congrats, Yong, this is your first published article!
[07-2012] Accepted paper at the 4th TPC Technology Conference on Performance Evaluation and Benchmarking (TPCTC 2012), held with VLDB with work on cloud computing -
[23-07-2012] Talk at Software Systems Research Group, NICTA, Sydney, Australia, with work on cloud computing and gaming Massivizing Online Games: Distributed Computing Challenges and High Quality Time, PDF [8.5MB]
[06-07-2012] Talk at CLOUDS Lab, U. Melbourne, Melbourne, Australia, with work on cloud computing and gaming Massivizing Online Games: Distributed Computing Challenges and High Quality Time, PDF [8.5MB]
[05-07-2012] Talk at CAIA group, U. Swinburne, Melbourne, Australia, with work on cloud computing and gaming Massivizing Online Games: Distributed Computing Challenges and High Quality Time, PDF [8.5MB]
[26-06-2012] Today I turned 18. h-index. Google Scholar Google Scholar.
[11-04-2012] Talk at Computer Science Faculty, Politehnica University of Bucharest, RO about work on cloud computing and gaming - -
[03-04-2012] Talk at Game Ontwerp 2012, U. Utrecht, NL about work on cloud computing and gaming -
[14-03-2012] Talk at HPDC 2012 Workshop on Trends in High-Performance Distributed Computing, Amsterdam, NL about work on cloud computing and gaming -
[03-02-2012] Athanasios Antoniou finishes his MSc thesis, with work on cloud computing -  Congratulations!
[31-01-2012] Accepted paper at IEEE CCGrid'12, with work on cloud computing -
[24-01-2012] Otto Visser joins our team, with work on gaming and cloud computing. Welcome!
[24-01-2012] Arnoud Bakker finishes his MSc thesis, with work on gaming -  Congratulations!
[23-01-2012] Willem Bult starts his MSc thesis, with work on mobile gaming and social/cloud computing, part of the Musubi project (co-supervised with Eelco Visser and Monica Lam) Welcome!
[26-12-2011] Accepted journal paper at ACM TOMCCAP, with work on gaming Article Procedural Content Generation for Games: A Survey in ACM TOMCCAP, PDF [1.35MB]
[14-12-2011] Accepted paper at IEEE IPDPS'12, with work on cloud computing -
[13-11-2011] Invited talk at Universiteit van Amsterdam (UVA), with work on gaming and p2p Talk Internet-Based Distributed Systems, PPT [13MB]
[12-2011] Technical Report PDS-2011-009: An Analysis of Provisioning and Allocation Policies for Infrastructure-as-a-Service Clouds: Extended Results -
[11-2011] Technical Report PDS-2011-007: Human Mobility in Virtual and Real Worlds: Characterization, Modeling, and Implications -
[15-11-2011] Invited talk at ICT.OPEN 2011, with work on cloud computing Talk Cloud Computing: Open Research Questions for the Next Decade, PDF [3.5MB] | Talk Cloud Computing: Open Research Questions for the Next Decade, OpenOffice ODF [3.5MB]
[24-10-2011] TUD Challent student Ruben Verboon joins our research team with work on cloud computing. Welcome!
[07-10-2011] TUD Challent Anand Sawant joins our research team with work on cloud computing and gaming. Welcome!
[09-2011] Guo Yong joins our research team with work on cloud computing and gaming. Welcome!
[16-08-2011] Accepted paper at NetGames 2011, with work on gaming Article RTSenv: An Experimental Environment for Real-Time Strategy
Games
 in NetGames 2011, PDF [0.5MB]
[01-08-2011] Accepted paper at MMVE 2011, with work on gaming Article The XFire Online Meta-Gaming Network: Observation and High-Level Analysis
 in MMVE 2011, PDF [0.5MB]
[14-07-2011] Submitted revision to accepted journal paper at ACM TOMCCAP, with work on gaming Article Procedural Content Generation for Games: A Survey in ACM TOMCCAP, PDF [1.35MB]
[28-06-2011] Accepted paper at P2P 2011, with work on p2p systems Article Identifying, Analyzing, and Modeling Flashcrowds in BitTorrent
 in IEEE P2P 2011, PDF [1.35MB]
[01-06-2011] Orna wins for us the best poster award (tied) at IBM-sponsored SYSTOR 2011 -
[10-05-2010] Talk at Complex HPC Summer School, Amsterdam, NL about work on cloud computing and grid computing - -
[15-04-2010] Talk at Google Symposium, TU Delft, Delft, NL about work on cloud computing and gaming -
[01-04-2011] Keynote at GNARP 2011, Garderen, NL about work on gaming (massively social gaming) -
[31-03-2011] Accepted paper at LSAP 2011, with work on gaming (bridge, social networks) Article An Analysis of Social Gaming Networks in Online and Face to Face Bridge Communities
 in ACM/IEEE LSAP 2011, PDF [0.25MB]
[01-2011] Accepted paper at CCGrid 2011, with work on cloud computing (performance variability) -
[01-2011] Accepted paper at ICPE 2011, with work on gaming (cloud-based gaming, economic modeling)
[01-2011] Course material: IN3305 Seminarium, Lecture on Literature Search - | -
[12-2010] Talk at Year-End Symposium AMOLF, NL about work on gaming (massively social gaming) -
[12-2010] Talk at University of Utrecht, NL about work on gaming (massively social gaming) -
[11-2010] Two talks at NetGames about work on gaming (massively social gaming) - and cloud computing (large-scale data, game analytics) -
[11-2010] The BridgeHelper web site is up -
[11-2010] Technical Report PDS-2010-009: Identifying and Modeling Flashcrowds in Global BitTorrent Systems -
[11-2010] Talk at ASCI about work on gaming (massively social gaming) -
[10-2010] Article accepted in IEEE Internet Computing--Grid Computing Workloads: Bags of Tasks, Workflows, Pilots, and Others; work on grid computing (workload characterization and modeling) -
[10-2010] Technical Report PDS-2010-008: User Behavior, Social Networking, and Playing Style in Online and Face to Face Bridge Communities -
[10-2010] Accepted paper at NetGames 2010, with work on gaming (analytics) CAMEO: Enabling Social Networks for Massively Multiplayer Online
Games through Continuous Analytics and Cloud Computing at NetGames 2010, PDF [0.3MB]
[10-2010] Accepted short paper (poster) at NetGames 2010, with work on gaming (analytics) Article User Behavior, Social Networking, and Playing Style in Online and
Face to Face Bridge Communities in ACM/IEEE NetGames 2010, PDF [0.2MB]
[09-2010] Siqi Shen joins our research team with work on cloud computing and gaming. Welcome!
[09-2010] Camera-ready version of article in IJAMC, with work on gaming (virtualization) The Impact of Virtualization on the Performance and Operational Costs of Massively Multiplayer
Online Games in IJAMC 2010, PDF [0.5MB]
[09-2010] Camera-ready version of article in CCPE, with work on gaming (content generation) Article POGGI: Generating Puzzle Instances for Online Games on Grid Infrastructures in Elsevier CPE 2010, PDF [0.5MB]
[02-09-2010] Course material: TI1100A, Lecture on Internet-Based Applications -
[26-08-2010] Talk at Google in Mountain View about work on cloud computing (performance)
[24-08-2010] Talk at LBNL about work on cloud computing (performance)
[23-08-2010] Talk at RADLab, UC Berkeley, about work on cloud computing (performance)
[08-2010] Camera-ready version of article in TPDS, with work on cloud computing (performance analysis) Article Performance Analysis of Cloud Computing Services for Many-Tasks Scientific Computing in IEEE TPDS 2010, PDF [0.5MB]
 
 Community
Journal Reviewer <-- click to see more details


Program Committee Membership <-- click to see more details
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 Research
Gaming and Gamification Research <-- click to see more details

Answering research questions such as What are the characteristics of real MMOG workloads?, How to evaluate the performance of a system, algorithm, or mechanism designed for MMOGs?, and Can MMOGs make use of clouds?
    Highlights:
  1. A. Iosup, S. Shen, Y. Guo, S. Hugtenburg, J. Donkervliet, and R. Prodan (U. Innsbruck, Austria). Massivizing Online Games Using Cloud Computing: A Vision, In the First International Workshop on Cloud Gaming Systems and Networks (C-Game 2014), held in conjunction with the IEEE International Conference on Multimedia and Expo (ICME 2014), Chengdu, China, Jul 2014. -
    keywords Massivizing online games; online social games; online games; virtual world management; big data processing; procedural content generation; PCG; PCG-G.
     
  2. A. Iosup, R. van de Bovenkamp, S. Shen, A. L. Jia, and F. A. Kuipers. An Analysis of Implicit Social Networks in Multiplayer Online Games, In the IEEE Internet Computing, special issue on Internet-Scale Games. Vol.18(3), May/Jun 2014. journal -
    keywords Online social games; social networks; learning; data mining; multiplayer online games; Internet applications; graph processing; graph datasets.
     
  3. V. Nae, R. Prodan, and A. Iosup. SLA-based operations of massively multiplayer online games in clouds, In the Springer Multimedia Systems Journal (MMSJ), (accepted, in print; online pre-print available Jan 2014). journal -
    keywords Online social games; social networks; learning; data mining; multiplayer online games; Internet applications; graph processing; graph datasets.
     
  4. S. Shen, N. Brouwers, and A. Iosup. Characterization of Human Mobility in Networked Virtual Environments, In the ACM Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2014). Singapore, 19-20 Mar 2014. -
    keywords mobility; networked virtual environments; characterization; online gaming; MMOG; MMO; World of Warcraft; Second Life; active measurement; experimental research.
     
  5. Alexandru Iosup and Dick Epema. An Experience Report on Using Gamification in Technical Higher Education, ACM Technical Symposium on Computer Science Education SIGCSE 2014, March 5.8, 2014, Atlanta, GA, USA. An Experience Report on Using Gami?cation in Technical Higher Education, PDF [0.5MB]
    keywords gamification; CS Ed research; experience report; Design; Experimentation; Human Factors; Computer science education; Computer organization; Cloud computing; undergraduate courses; graduate courses.
     
  6. S. Shen, K. Deng, A. Iosup, and D. Epema, Scheduling Jobs in the Cloud Using On-demand and Reserved Instances, Submitted to the 19th International European Conference on Parallel and Distributed Computing (Euro-Par 2013). -
    keywords cloud computing, scheduling, cost optimization, reserved instance, integer programming.
     
  7. V. Nae, R. Prodan, and A. Iosup, Autonomic Cloud-based Operation of Massively Multiplayer Online Games, In the ACM Cloud and Autonomic Computing Conference (CAC 2013). -
    keywords Massively Multiplayer Online Games (MMOGs), Cloud computing, Service Level Agreements (SLA), Quality of Service (QoS).
     
  8. A. Olteanu, A. Iosup, and N. Tapus, Towards a Workload Model for Online Social Applications, In the 4th ACM/SPEC International Conference on Performance Engineering (ICPE 2013). Work-in-Progress Paper. -
    keywords online social gaming; workload characterization; workload modeling; Benchmarking; performance modeling.
     
  9. A.-C. Olteanu, N. Tapus, and A. Iosup Extending the Capabilities of Mobile Devices for Online Social Applications through Cloud Offloading, In IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid). Doctoral Symposium. Delft, the Netherlands, 20-24 May 2013. -
    keywords mobile applications; cloud computing; social applications; online gaming; workload characterization; workload modeling; offloading mechanisms; communication offloading; lossy performance offloading; lossless performance offloading; experimental research; empirical research.
     
  10. S. Shen, A. Iosup, and D. Epema Massivizing Multi-Player Online Games on Clouds, In IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid). Doctoral Symposium. Delft, the Netherlands, 20-24 May 2013. -
    keywords online gaming; cloud computing; workload characterization; workload modeling; scalability; elasticity; reliability; performance evaluation; experimental research; empirical research.
     
  11. R. van de Bovenkamp, S. Shen, A. Iosup, and F.A. Kuipers, Understanding and Recommending Play Relationships in Online Social Gaming, In the 5th International Conference on COMmunication Systems and NETworkS (COMSNETS 2013), Bangalore, India, January 7-10, 2013 (invited, acceptance ratio 26%=38/144) -
    keywords graph processing algorithms, graph extraction, play relationships, DotA, Gaming, Online social networks, graph properties, user behavior, matchmaking.
     
  12. Y. Guo and A. Iosup, The Game Trace Archive, In International Workshop on Network and Systems Support for Games (NetGames 2012), Venice, Italy, November 22-23, 2012 (accepted, acceptance ratio 20%=9/44) -
    keywords The Game Trace Archive, open-access data, public data, open-source data, archive, games, Gaming, Online social networks, User behavior.
     
  13. V. Nae, L. Kopfle, R. Prodan, and A. Iosup, Massively Multiplayer Online Games on Unreliable Resources, In International Workshop on Network and Systems Support for Games (NetGames 2012), Venice, Italy, November 22-23, 2012 (accepted as short paper) -
    keywords MMOG, online gaming, fault-tolerance, cloud computing, reliability, QoS, monitoring.
     
  14. Y. Guo, S. Shen, O. Visser, and A. Iosup, An Analysis of Online Match-Based Games, In International Workshop on Massively Multiuser Virtual Environments (MMVE 2012), October 08-09, 2012, Munich, Germany; held in conjunction with the IEEE International Symposium on Audio-Visual Environments and Games (HAVE 2012) (accepted) -
    keywords match-based games, Play duration, Win ratio, Matchmaking, Gaming, Online social networks, User behavior.
     
  15. S. Shen, O. Visser, and A. Iosup, RTSenv: An Experimental Environment for Real-Time Strategy Games , In International Workshop on Network and Systems Support for Games (NetGames 2011), October 6-7, Ottawa, Canada, 2011 (accepted) Article RTSenv: An Experimental Environment for Real-Time Strategy
Games
 in NetGames 2011, PDF [0.5MB]
    keywordsRTSenv, Real-Time Strategy Games, testing, performance evaluation, Gaming, User Experience, Online games.
     
  16. S. Shen, and A. Iosup, The XFire Online Meta-Gaming Network: Observation and High-Level Analysis , In International Workshop on Massively Multiuser Virtual Environments (MMVE 2011), October 14-17, 2011, Nanchang, JiangXi Province, China; held in conjunction with the IEEE International Symposium on Audio-Visual Environments and Games (HAVE 2011) (accepted) Article The XFire Online Meta-Gaming Network: Observation and High-Level Analysis
 in MMVE 2011, PDF [0.5MB]
    keywords Meta-Gaming Networks, XFire, Social networks, Community structure, User Content Generation, Play duration, Gaming, Online social networks, Face to face social networks, User behavior.
     
  17. M. Hendrikx, S. Meijer, J. v.d. Velden, and A. Iosup, Procedural Content Generation for Games: A Survey, In ACM Transactions on Multimedia Computing, Communications and Applications (ACM TOMCCAP) (accepted with revisions; revision submitted July 2011) Article Procedural Content Generation for Games: A Survey in ACM TOMCCAP, PDF [1.35MB]
    keywords procedural content generation for games, survey, PCG-G, PCG, Gaming, FDG, CIG, AIIDE, DiGRA, SIGGRAPH, SIGCHI, EuroPar, LSAP, PCGames.
     
  18. M. Balint, V. Posea, A. Dimitriu, and A. Iosup, An Analysis of Social Gaming Networks in Online and Face to Face Bridge Communities , In ACM Workshop on Large-scale System and Application Performance (LSAP 2011), San Jose, CA, USA, June 8, 2011; held in conjunction with the 20-th International ACM Symposium on High-Performance Parallel and Distributed Computing (HPDC 2011) (accepted) Article An Analysis of Social Gaming Networks in Online and Face to Face Bridge Communities
 in ACM/IEEE LSAP 2011, PDF [0.25MB]
    keywords Social networks, Community structure, Gaming, Online social networks, Face to face social networks, Bridge, User behavior, Playing style.
     
  19. V. Nae, R. Prodan, T. Fahringer, and A. Iosup, A new business model for massively multiplayer online games, 2nd ACM/SPEC International Conference of Performance Engineering (ICPE 2011), March 2011. (accepted)
    keywords cloud computing, economic model, massively multiplayer online games, MMOG, cloud-based gaming.
     
  20. A. Iosup, A. Lascateu, N. Tapus, CAMEO: Enabling Social Networks for Massively Multiplayer Online Games through Continuous Analytics and Cloud Computing, In ACM/IEEE Symposium on Network and Systems Support for Games (NetGames 2010), Taipei, Taiwan, November 16-17, 2010 (accepted, acceptance ratio 30%=9/27) Article CAMEO: Enabling Social Networks for Massively Multiplayer Online
Games through Continuous Analytics and Cloud Computing in ACM/IEEE NetGames 2010, PDF [0.3MB] | --
    keywords CAMEO, game analytics, cloud computing, massively social gaming, data acquisition, data mining, data visualization.
     
  21. M. Balint, V. Posea, A. Dimitriu, and A. Iosup, User Behavior, Social Networking, and Playing Style in Online and Face to Face Bridge Communities, In ACM/IEEE Symposium on Network and Systems Support for Games (NetGames 2010), Taipei, Taiwan, November 16-17, 2010 (accepted, short paper) Article User Behavior, Social Networking, and Playing Style in Online and
Face to Face Bridge Communities in ACM/IEEE NetGames 2010, PDF [0.2MB] | --
    keywords BBO, BBO Fans, game analytics, massively social gaming, data acquisition, data mining, social networking.
     
  22. A. Iosup, Vlad Nae, and Radu Prodan, The Impact of Virtualization on the Performance and Operational Costs of Massively Multiplayer Online Games, In Int. J. Adv. Media and Comput. (IJAMC), vol.4(4), pp.364-386, 2010 (accepted). journal The Impact of Virtualization on the Performance and Operational Costs of Massively Multiplayer
Online Games in IJAMC 2010, PDF [0.5MB]Electronic EditionBiBTeX Entry
    keywords massively multiplayer online games, platform, virtualization, cloud computing.
     
  23. A. Iosup, POGGI: Generating Puzzle Instances for Online Games on Grid Infrastructures, In Concurrency and Computation: Practice and Experience (CPE), 2010 (accepted). journal POGGI: Generating Puzzle
Instances for Online Games on Grid Infrastructures in CCPE 2010, PDF [0.7MB]Electronic EditionBiBTeX Entry
    keywords puzzle instance generation, massively multiplayer online games, content generation, platform, grid computing, cloud computing.
     
  24. R. Prodan, V. Nae, and A. Iosup, Dynamic Resource Provisioning in Massively Multiplayer Online Games, In IEEE Transactions on Parallel and Distributed Systems (TPDS), 2010 (accepted). journal Article Dynamic Resource Provisioning in Massively Multiplayer Online Games in IEEE TPDS 2010, PDF [1.0MB]Electronic EditionBiBTeX Entry

    keywords massively multiplayer online games, platform, virtualization, cloud computing.
     
  25. V. Posea, M. Balint, A. Dimitriu, A. Iosup, An analysis of the BBO fans online social gaming community, In Roedunet International Conference (RoEduNet), 2010 9th, Jun 24-26, 2010 (accepted). Article An analysis of the BBO fans online social gaming community at RoEduNet 2010, PDF [0.8MB]Electronic EditionBiBTeX EntryConference Entry
    keywords massively social gaming, social network analysis, BBO Fans, social networks, massively multiplayer online games, game analytics, MMOG analytics, MSG analytics.
     
  26. A. Iosup, POGGI: Puzzle-Based Online Games on Grid Infrastructures, In Euro-Par Conference 2009, Aug 25-29, 2009 (accepted). Distinguished Paper Award! Article POGGI: Puzzle-Based Online Games on Grid Infrastructures at EuroPar 2009, PDF [0.8MB]Electronic EditionDBLP BiBTeX EntryDBLP Conference Entry
    keywords massively multiplayer online games, game content generation, grid computing, resource management, workflows.
     
  27. V. Nae, A. Iosup, R. Prodan, and T. Fahringer, The Impact of Virtualization on the Performance of Massively Multiplayer Online Games, In ACM/IEEE Symposium on Network and Systems Support for Games (NetGames 2009), Paris, France, November 23-24, 2009 (accepted, acceptance ratio 27%=10/37). The Impact of Virtualization on the Performance of Massively Multiplayer Online Games at NetGames 2009, PDF [0.5MB]Electronic EditionBiBTeX Entry
    keywords massively multiplayer online games, platform, virtualization, cloud computing.
     
  28. A. Iosup, CAMEO: Continuous Analytics for Massively Multiplayer Online Games on Cloud Resources, In 2nd International Workshop on Real Time Online Interactive Applications on the Grid (ROIA 2009), Delft, the Netherlands, August 24, 2009, Springer, LNCS vol.6043, p.289-299 (accepted). CAMEO: Continuous Analytics for Massively Multiplayer Online Games on Cloud Resources at ROIA 2009, PDF [0.5MB]Electronic EditionDBLP BiBTeX EntryDBLP Conference Entry
    keywords massively multiplayer online games, analytics, mmog analytics, game analytics, cloud computing.
     
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Cloud Computing Research <-- click to see more details

Answering research questions such as What is the actual performance of virtualized cloud resources?, What guarantees do we have about the good performability of clouds over long periods of time?, and Which new applications can make use of clouds?
    Highlights (excluding gaming-related articles that have a strong cloud component, see the gaming research part):
  1. M. Capota, B. Ghit, T. Hegeman, D. Epema, and A. Iosup. V for Vicissitude: The Challenge of Scaling Complex Big Data Workflows, In the IEEE/ACM CCGRID (SCALE Challenge 2014). Chicago, IL, USA, 26-29 May 2014. (accepted) - Update 27-05-2014: We won the challenge!
    keywords Vicissitude; Big Data; scientific workflow; MapReduce; Hadoop; empirical evaluation; experimental research.
     
  2. B. Ghit, A. Iosup, N. Yigitbasi (Intel Labs, Portland, OR, USA), and D. Epema. Balanced Resource Allocations Across Multiple Dynamic MapReduce Clusters, In the ACM SIGMETRICS Conference on Measurement and Modeling of Computer Systems (SIGMETRICS 2014). Austin, TX, USA, 16-20 Jun 2014. (accepted, acceptance ratio 17%=40/238) -
    keywords Fawkes; elastic MapReduce; performance evaluation; big data processing; MapReduce; Hadoop; YARN; empirical evaluation; experimental research.
     
  3. Y. Guo, M. Biczak, A. L. Varbanescu, A. Iosup, C. Martella, and T. L. Willke. How Well do Graph-Processing Platforms Perform? An Empirical Performance Evaluation and Analysis, In the IEEE International Parallel and Distributed Processing Symposium (IPDPS 2014). Phoenix, AZ, USA, 19-23 May 2014. (accepted, acceptance ratio 21%=114/541) -
    keywords graph processing; performance evaluation; big data processing; benchmarking; MapReduce; Hadoop; YARN; Giraph; GraphLab; Neo4J;graph-processing algorithms; graph-processing datasets; empirical evaluation; experimental research.
     
  4. Y. Guo, A. L. Varbanescu, A. Iosup, C. Martella, and T. L. Willke. Benchmarking Graph-Processing Platforms: A Vision, In the ACM/SPEC International Conference on Performance Engineering (ICPE 2014), Work-in-Progress Track. Dublin, Ireland, 22-26 Mar 2014. (accepted, acceptance ratio 31%=6/19) -
    keywords graph processing; performance evaluation; big data processing; benchmarking; MapReduce; Hadoop; YARN; Giraph; GraphLab; Neo4J; graph-processing algorithms; graph datasets; empirical evaluation; experimental research.
     
  5. K. Deng, A. Iosup, Junqiang Song, and Kaijun Ren Exploring Portfolio Scheduling for Long-Term Execution of Scientific Workloads in IaaS Clouds, In the ACM/IEEE Conference on High Performance Computing (SC|13). Denver, Colorado, USA, 17-22 Nov 2013. (accepted, acceptance ratio 20%=92/457) -
    keywords portfolio scheduler; portfolio scheduling; data center; data centre; scheduling policies; Scheduling; IaaS clouds; Cloud computing; simulation; performance evaluation; Scheduling; Quality of service and service-level agreement management.
     
  6. A. L. Varbanescu and A. Iosup, On Many-Task Big Data Processing: from GPUs to Clouds, In the 6th Workshop on Many-Task Computing on Grids and Supercomputers (MTAGS) held in conjunction with SC|13. Denver, Colorado, USA, 17 Nov 2013. (invited) -
    keywords Large-scale big-data processing; Execution engine; Predictability; Elasticity; High-performance; portfolio scheduling; socially aware scheduling; cloud computing; cloud-based big data.
     
  7. T. Hegeman, B. Ghit, M. Capotã, J. Hidders, D. Epema, and A. Iosup The BTWorld Use Case for Big Data Analytics: Description, MapReduce Logical Workflow, and Empirical Evaluation, In the IEEE International Conference on Big Data (Big Data 2013). Santa Clara, CA, USA, 6-9 Oct 2013. (accepted, acceptance ratio 17%=45/259) -
    keywords BTWorld; big data processing; use case; MapReduce logical workflow; benchmarking; performance evaluation; empirical evaluation; experimental research.
     
  8. Aleksandar Milenkoski (KIT, DE), Alexandru Iosup (TUD, NL), Samuel Kounev (KIT, DE), Kai Sachs (SAP AG, DE), Piotr Rygielski (KIT, DE), Jason Ding (Salesforce, CA, USA), Walfredo Cirne (Google Inc., CA, USA), Florian Rosenberg (IBM T.J. Watson, NY, USA). Cloud Usage Patterns: A Formalism for the Description of Cloud Usage Scenarios, SPEC Research Group's Technical Report SPEC-RG-2013-001 (Version: 1.0). April 25, 2013. Cloud Usage Patterns: A Formalism for the Description of Cloud Usage Scenarios, PDF [3.5MB] (Update April 2013)
    keywords cloud usage patterns; formalism; cloud computing; IaaS; PaaS; SaaS; software engineering.
     
  9. K. Deng, R. Verboon, and A. Iosup A Periodic Portfolio Scheduler for Scientific Computing in the Data Center, In the 17th Workshop on Job Scheduling Strategies for Parallel Processing (JSSPP'13). Held in conjunction with the IEEE International Parallel and Distributed Processing Symposium (IPDPS). Boston, Massachusetts, USA, 24 May 2013. -
    keywords portfolio scheduler; portfolio scheduling; data center; data centre; scheduling policies; Scheduling; IaaS clouds; Cloud computing; simulation; performance evaluation.
     
  10. A.-C. Olteanu, N. Tapus, and A. Iosup Extending the Capabilities of Mobile Devices for Online Social Applications through Cloud Offloading, In IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid). Doctoral Symposium. Delft, the Netherlands, 20-24 May 2013. -
    keywords mobile applications; cloud computing; social applications; online gaming; workload characterization; workload modeling; offloading mechanisms; communication offloading; lossy performance offloading; lossless performance offloading; experimental research; empirical research.
     
  11. S. Shen, A. Iosup, and D. Epema Massivizing Multi-Player Online Games on Clouds, In IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid). Doctoral Symposium. Delft, the Netherlands, 20-24 May 2013. -
    keywords online gaming; cloud computing; workload characterization; workload modeling; scalability; elasticity; reliability; performance evaluation; experimental research; empirical research.
     
  12. B. Ghit, A. Iosup, and D. Epema Towards an Optimized Big Data Processing System, In IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid). Doctoral Symposium. Delft, the Netherlands, 20-24 May 2013. -
    keywords Big Data; elastic MapReduce; cloud computing; MapReduce; Hadoop; workload characterization; workload modeling; scalability; elasticity; performance evaluation; benchmarking; experimental research; empirical research.
     
  13. A. Iosup, R. Prodan, and D. Epema, IaaS Cloud Benchmarking: Approaches, Challenges, and Experience, In 5th Workshop on Many-Task Computing on Grids and Supercomputers (MTAGS 2012), held in conjunction with SC, Salt Lake City, Utah, USA, Nov 2012. (invited) -
    keywords Benchmarking; challenges; IaaS clouds; Cloud computing; performance evaluation; concepts; discussion.
     
  14. E. Folkerts, A. Alexandrov, K. Sachs, A. Iosup, V. Markl, and C. Tosun, Benchmarking in the Cloud: What it Should, Can, and Cannot Be, In TPC Technology Conference on Performance Evaluation and Benchmarking (TPCTC 2012), held in conjunction with VLDB 2012, Istanbul, Turkey, Aug 2012. -
    keywords Benchmarking; Cloud computing; performance evaluation; concepts; discussion.
     
  15. D. Villegas, A. Antoniou, S. M. Sadjadi, and A. Iosup, An Analysis of Provisioning and Allocation Policies for Infrastructure-as-a-Service Clouds, In IEEE/ACM International Symposium on Cluster, Cloud and Grid Computing (CCGrid), May 13-16, 2012, Ottawa, Canada. (accepted; acceptance ratio 27%=83/302) Extended version as Technical Report PDS-2011-009 -
    keywords Scheduling; Cloud computing; Provisioning policies; Allocation policies; Empirical performance analysis; Prediction-based scheduling.
     
  16. O. Agmon Ben-Yehuda, A. Schuster, A. Sharov, M. Silberstein, and A. Iosup, ExPERT: Pareto-Efficient Task Replication on Grids and a Cloud, IEEE International Parallel and Distributed Processing Symposium (IPDPS). (accepted; acceptance ratio 21%=118/569) Extended version as Technical Report Technion CS-2011-03 -
    keywords Scheduling; Cloud computing; Provisioning policies; Pareto scheduling; bags of tasks; Empirical performance analysis; Simulation-based scheduling.
     
  17. A. Iosup, N. Yigitbasi, and D. Epema, On the Performance Variability of Production Cloud Services, IEEE/ACM International Symposium on Cluster, Cloud, and Grid Computing (CCGrid 2011). (accepted; acceptance ratio 29%=55/189) Extended version as Technical Report PDS-2010-002 -
    keywords cloud computing, performance variability, social applications, Amazon Web Services, Google App Engine.
     
  18. A. Iosup, S. Ostermann, N. Yigitbasi, R. Prodan, Th. Fahringer, and D. Epema, Performance Analysis of Cloud Computing Services for Many-Tasks Scientific Computing, IEEE Trans. on Parallel and Distributed Systems (TPDS) (accepted, in print). journal Article Performance Analysis of Cloud Computing Services for Many-Tasks Scientific Computing in IEEE TPDS 2010, PDF [0.5MB]BiBTeX Entry
    keywords cloud computing, scientific computing, performance evaluation.
     
  19. S. Ostermann, A. Iosup, N. Yigitbasi, R. Prodan, T. Fahringer, and D. Epema, A Performance Analysis of EC2 Cloud Computing Services for Scientific Computing, In Diaz, M. and Avresky, D. and Bode, A. and Bruno, C. and Dekel, E. (Eds.): Cloudcomp 2009, LNICST 34, pp. 115-131, 2010. Cloud Computing: First International Conference, CloudComp 2009, Munich, Germany, October 19-21, 2009, Revised Selected Papers, pp. 115-131, Munich, Germany. Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering (LNICST) 34, Springer. Article A Performance Analysis of EC2 Cloud Computing Services for Scientific Computing at CloudComp 2009, PDF [0.5MB]BiBTeX Entry
    keywords cloud computing, scientific computing, performance evaluation.
     
  20. N. Yigitbasi, A. Iosup, S. Ostermann, and D.H.J. Epema, C-Meter: A Framework for Performance Analysis of Computing Clouds, In the International Workshop on Cloud Computing (Cloud 2009), May 18-21, 2009, in conjunction with CCGrid'09 (accepted). Article C-Meter: A Framework for Performance Analysis of Computing Clouds at Cloud'09, PDF [0.3MB]Electronic EditionDBLP BiBTeX EntryDBLP Conference Entry
    keywords cloud computing, GrenchMark, performance evaluation, C-Meter.
     
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Grid Computing Research

Answering research questions such as How to inter-operate grids?, What are the characteristics of grid workloads?, and How to evaluate the performance of grid architectures, mechanisms, and algorithms?

    Highlights:
  1. A. Iosup and D.H.J. Epema, Grid Computing Workloads, In IEEE Internet Computing, vol. 15, no. 2, pp. 19-26, Mar./Apr. 2011, doi:10.1109/MIC.2010.130 (accepted). journal Grid Computing Workloads: BoTs, Workflows, Pilots, and Others as PDS Tech.Rep., PDF [0.2MB]Electronic Edition
    keywords workload, grid computing, workload characterization, grid workloads, performance evaluation.
     
  2. O. Sonmez, N. Yigitbasi, S. Abrishami, A. Iosup, and D.H.J. Epema, Performance Analysis of Dynamic Workflow Scheduling in Multicluster Grids, In the ACM/IEEE Int'l. Symp. on High Performance Distributed Computing (HPDC'10), Jun 20-25, 2010 (accepted). Article Performance Analysis of Dynamic Workflow Scheduling in Multicluster Grids at HPDC 2010, PDF [0.4MB]
    keywords workflows, grid computing, scheduling, trace-based simulation.
     
  3. O. Sonmez, N. Yigitbasi, A. Iosup, and D.H.J. Epema, Trace-Based Evaluation of Job Runtime and Queue Wait Time Predictions in Grids, In the ACM/IEEE Int'l. Symp. on High Performance Distributed Computing (HPDC'09), Jun 11-13, 2009 (accepted). Article Trace-Based Evaluation of Job Runtime and Queue Wait Time Predictions in Grids at HPDC 2009, PDF [0.8MB]
    keywords prediction, grid computing, scheduling, trace-based simulation.
     
  4. O. Sonmez, B. Grundeken, H. Mohamed, A. Iosup, and D.H.J. Epema, Scheduling Strategies for Cycle Scavenging in Multicluster Grid Systems, In the IEEE International Symposium on Cluster Computing and the Grid (CCGrid'09), May 18-21, 2009 (accepted; acceptance ratio 21%=57/271). Article Scheduling Strategies for Cycle Scavenging in Multicluster Grid Systems at CCGrid 2009, PDF [0.2MB]
    keywords cycle scavenging, grid computing, scheduling, game solving, eternity ii.
     
  5. A. Iosup, O. Sonmez, S. Anoep, and D.H.J.Epema, The Performance of Bags-Of-Tasks in Large-Scale Distributed Computing Systems, In the IEEE Symp. on High Performance Distributed Computing (HPDC'08), Jun, 2008 (accepted; acceptance ratio 17%). Article Performance of Bags-of-Tasks at HPDC 2008, PDF [0.3MB] | Talk Performance of Bags-of-Tasks at HPDC 2008, PPT [3.0MB]
    info bags-of-tasks, batches, workload modeling, scheduling, performance evaluation.
     
  6. A. Iosup, O. Sonmez, and D.H.J. Epema, DGSim: Comparing Grid Resource Management Architectures Through Trace-Based Simulation, In E. Luque, T. Margalef, and D. Benitez (Eds.), Euro-Par 2008, LNCS 5168, pp. 13?25, 2008, Las Palmas de Gran Canaria, Canary Islands, ES, (Euro-Par'08), Aug 2008 (accepted; acceptance ratio 30%).
    Article about the DGSim Grid Simulation Framework at EuroPar 2008, PDF [0.3MB] | Talk about the DGSim Grid Simulation Framework at EuroPar 2008, PPT [2.5MB]
    info DGSim, simulation framework, grid, performance evaluation, resource management, trace-based simulation.
     
  7. A. Iosup, D.H.J. Epema, T. Tannenbaum, M. Farrellee, and M. Livny, Inter-Operating Grids through Delegated MatchMaking, In the ACM/IEEE SuperComputing Conference on High Performance Networking and Computing (SC'07), Nov 10-16, 2007 (acceptance ratio 20%). SC'07 Best Paper Award finalist (top 10% accepted papers). Delegated MatchMaking Article, PDF [1.5MB] | Talk about Inter-Operating Grids Through Delegated MatchMaking at SuperComputing 2007, PPT [3.5MB]
    info inter-operating grids with a solution that combines the hierarchical and the decentralized approaches.
     
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Peer-to-Peer Computing Research <-- click to see more details

Answering research questions such as What are the characteristics of global BitTorrent systems?, How to define and how good are the Quality of Service and the Quality of Experience in P2P systems?, and Are hybrid P2P-centralized systems useful?
    Highlights:
  1. B. Zhang, A. Iosup, J. Pouwelse, and D. Epema, Identifying, Analyzing, and Modeling Flashcrowds in BitTorrent, IEEE Int'l. Conf. on Peer-to-Peer Computing (P2P'11) Article Identifying, Analyzing, and Modeling Flashcrowds in BitTorrent
 in IEEE P2P 2011, PDF [1.35MB]. An extended version is available as TU Delft Technical Report PDS-2010-009 -
    keywords flashcrowds, BitTorrent, trace archive, analysis, trace characterization, statistical modeling, peer-to-peer.
     
  2. B. Zhang, A. Iosup, J. Pouwelse, and D. Epema, The Peer-to-Peer Trace Archive: Design and Comparative Trace Analysis, (under submission). An extended version is available as TU Delft Technical Report PDS-2010-003 -
    keywords Peer-to-Peer Trace Archive, peer-to-peer, trace archive, analysis, general models, statistical modeling, Quality of Service, Quality of Experience.
     
  3. M. Wojciechowski, M. Capotã, J. Pouwelse, and A. Iosup, BTWorld: Towards Observing the Global BitTorrent File-Sharing Network, In ACM Workshop on Large-Scale System and Application Performance (LSAP'10), in conjunction with the ACM/IEEE Int'l. Symp. on High Performance Distributed Computing (HPDC'10) - BiBTeX Entry
    keywords measurement, BitTorrent, peer-to-peer, traces, ten million of swarms, tens of millions of peers.
     
  4. J.A. Pouwelse, P. Garbacki, J. Wang, A. Bakker, J. Yang, A. Iosup, D.H.J. Epema, M. Reinders, M. van Steen, and H.J. Sips, Tribler: A social-based peer-to-peer system, Concurrency and Computation: Practice and Experience, 2008, vol. 20(2), pp. 127--138, DOI 10.1002/cpe.1189, (accepted, journal) Article, Tribler, PDF [200KB] Article, Tribler, PS [3MB] Electronic EditionDBLP BiBTeX EntryDBLP Conference Entry
    keywords peer-to-peer, file-sharing, Tribler, system, 2fast, collaborative downloads, recommendations.
     
  5. A. Iosup, P. Garbacki, J. Pouwelse, D.H.J.Epema, Correlating Topology and Path Characteristics of Overlay Networks and the Internet, In the 6th Int'l Workshop on Global and Peer-to-Peer Computing (GP2PC'06), in conjunction with the IEEE/ACM CCGrid'06. An extended version can be found as Technical Report PDS-2005-002 - | MultiProbe presentation, GP2PC/CCGrid'06 [PPT, 2MB] Electronic EditionDBLP BiBTeX EntryDBLP Conference Entry
    keywords Large-scale underlay/overlay network measurements, P2P measurements and analysis,
    The Delft BitTorrent Measurements 2.
     
  6. P. Garbacki, A. Iosup, D.H.J. Epema, M. van Steen, 2Fast: Collaborative downloads in P2P networks, In The Sixth IEEE International Conference on Peer-to-Peer Computing (P2P), Sep 6-8, 2006, Cambridge, UK. (accepted, 21%). Best Paper Award Article, PDF [210KB] Electronic EditionDBLP BiBTeX EntryDBLP Conference Entry
    keywords 2Fast, P2P file-sharing, collaborative downloads, cooperative behavior.
     
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The Grid Workloads Archive

The goal of the Grid Workloads Archive is to provide a virtual meeting place where practitioners and researchers can exchange grid workload traces.

The sixth trace in the Grid Workload Archive Format (GWF) has been added to the Grid Workloads Archive web site. We now have traces from the LCG, NorduGrid, Grid'5000, the DAS, etc. Visit my research web page for more details.

    Highlights:
  1. A. Iosup, H. Li, M. Jan, S. Anoep, C. Dumitrescu, L. Wolters, and D.H.J. Epema, The Grid Workloads Archive, Future Gen. Comp. Sys., vol. 24(7), pp. 672-686, May 2008, DOI 10.1016/j.future.2008.02.003, (accepted, journal). The Grid Workloads Archive Journal Article, PDF [0.6MB]
  2. A. Iosup, C. Dumitrescu, D.H.J. Epema, H. Li, L. Wolters, How are Real Grids Used? The Analysis of Four Grid Traces and Its Implications, The 7th IEEE/ACM International Conference on Grid Computing (Grid), Barcelona, September 28-29, 2006. Article, TU Delft/PDS/2006-003, PDF [800KB] | Presentation, Grid Traces at Grid2006, PPT [1MB] + Presentation, Grid Traces at Grid2006, PDF [400KB].
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The Failure Trace Archive

The Failure Trace Archive (FTA) is centralized public repository of availability traces of parallel and distributed systems, and tools for their analysis. The purpose of this archive is to facilitate the design, validation, and comparison of fault-tolerant models and algorithms.

New! The sixthteenth failure trace in the Failure Trace Archive Format (Tab-Separated Values) has been added to the Failure Trace Archive.

We have completed the analysis of a set of nine long-term failure traces taken from a variety of distributed systems.. Please visit my research web page for more details.


    Highlights:
  1. B. Javadi, D. Kondo, A. Iosup, and D. Epema, The Failure Trace Archive: Enabling the Comparison of Failure Measurements and Models of Distributed Systems, In Elsevier Journal of Parallel and Distributed Computing (JPDC). -
    keywords Failure Trace Archive; FTA; failure; availability; robustness; systems; characterization; modeling; Benchmarking; IaaS clouds; Cloud computing; performance evaluation.
     
  2. N. Yigitbasi, M. Gallet, D. Kondo, A. Iosup, and D. Epema, Analysis and Modeling of Time-Correlated Failures in Large-Scale Distributed Systems, In ACM/IEEE International Conference on Grid Computing (Grid'10), Oct 25-29, 2010 in Brussels, Belgium (accepted, acceptance ratio 23%=28/124). Extended version as Technical Report PDS-2010-004 Article Analysis and Modeling of Time-Correlated Failures in Large-Scale Distributed Systems at ACM/IEEE Grid 2010, PDF [5.5MB]
  3. M. Gallet, N. Yigitbasi, B. Javadi, D. Kondo, A. Iosup, and D. Epema, A Model for Space-Correlated Failures in Large-Scale Distributed Systems, In Euro-Par Conference 2010, Aug 31-Sep 3, 2010 (accepted). Extended version as Technical Report PDS-2010-001 -
  4. D. Kondo, B. Javadi, A. Iosup, and D. Epema, The Failure Trace Archive: Enabling Comparative Analysis of Failures in Diverse Distributed Systems, In IEEE International Symposium on Cluster Computing and the Grid (CCGrid'10), May 17-20, 2010, Melbourne, Victoria, Australia (accepted, acceptance ratio 23%=51/219). Best Paper Award!  Article The Failure Trace Archive: Enabling Comparative Analysis of Failures in Diverse Distributed Systems at IEEE CCGrid 2010, PDF [0.4MB]
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Performance Evaluation Tools

The GrenchMark web site
GrenchMark
 |  The ServMark web site
ServMark
GrenchMark is a flexible synthetic Grid workload generator, submitter, and results analyzer, developed at TU Delft to help in testing, analyzing, and comparing various Grid settings. Please visit the GrenchMark official web site. A GrenchMark presentation, CCGrid'06 talk describing GrenchMark has been presented at CCGrid'06. A more comprehensive GrenchMark presentation, ASCI Graduate Course A9, Spring 2007, PPT [3MB] GrenchMark/ServMark presentation has been presented at the ASCI Graduate Course A9 (also available as GrenchMark presentation, ASCI Graduate Course A9, Spring 2007, PDF [1MB]).
 
GrenchMark is also part of ServMark, a distributed testing, analysis, and comparison tool for Grid environments, middleware, and services. As of July 20, 2006, ServMark has been accepted as a Globus Incubator Project. A preview of ServMark's capabilities can be seen at GlobusWorld 2006. A first trial version of ServMark was released on October 1, 2006.
    Highlights:
  1. C. Stratan, A. Iosup, and D.H.J. Epema, A Performance Study of Grid Workflow Engines, In the IEEE/ACM International Conference on Grid Computing (Grid 2008), Tsukuba, JP (Grid'08), Sep 2008 (accepted; acceptance ratio 19%).
    info grid workflow engines, performance evaluation, GrenchMark, workflow, metrics, workload generation, experimental research.  Article A Performance Study of Grid Workflow Engines at Grid 2008, PDF [0.2MB] | Talk about Testing and Analyzing the Performance of Grid Workflow Engines at Grid 2008, PPT [1.0MB]
     
  2. A. Iosup, D.H.J.Epema, GrenchMark: A Framework for Analyzing, Testing, and Comparing Grids, In the 6th IEEE/ACM Int'l Symposium on Cluster Computing and the Grid (CCGrid'06). Article, GrenchMark, PDF [510KB] | GrenchMark presentation, CCGrid'06 [PPT, 3MB]
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 Other links
I found a couple of surveys about the quality of world universities (of course, the surveys also contain ranking tables). You can found the links to these surveys here.
 

 
The Koala team
The Koala team,
25.Jan.2k7

 
 
 
Rome Tour Guide
Rome Tour Guide

How to make the best of four short days in Rome, or A brief tour of Rome. Text, pics, street names, and uncanned opinions.
 
 
Suntastic mug!
You can check more albums
in the
personal corner
page.
 

 

Alexandru IOSUP
New! Albums
 
UC Berkeley, Aug 2010
UC Berkeley
Aug 2k10

 
Stanford, Aug 2010
Stanford
Aug 2k10

 
San Francisco, CA, Jul 2010
San Fran, CA
Jul 2k10

 
Muir Woods, San Francisco, CA, 27 Jul 2010
Muir Woods, San Fran
27 Jul 2k10

 
Seattle, WA, Apr 2010
Seattle, WA
Apr 2k10

 
Rotterdam Port at Night, 01 Feb 2010
Rotterdam Port
03 Feb 2k10

 
Rotterdam at Night, 01 Feb 2010
Rotterdam
20 Jan 2k10

 
NetGames, Nov 2009
NetGames, Paris
23-24 Nov 2k9

 
DE-CH-IT-AT, June 2009
DE-CH-IT-AT
14-19 Jun 2k9

 
Dachau, DE, June 2009
Dachau, DE
10 Jun 2k9

 
Munich, DE, June 2009
Munich, DE
9-14 Jun 2k9

 
UK in May, 2009
UK in May
May.2k9

 
Kasteel Keukenhof, NL, 2009
Kasteel Keukenhof, NL
May.2k9

 
Koninginnedag, Amsterdam, NL, 2009
Koninginnedag, Amsterdam, NL
Apr.2k9

 
Keukenhof, NL, 2009
Keukenhof, NL
Apr.2k9

 
Alexandru Iosup's Ph.D. Defense, 20 Jan 2009
Ph.D. Defense
20 Jan 2k9

 
flickr pics by A. Iosup
My flickr pics

 
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