TU Delft
 
Alexandru IOSUP
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Parallel and Distributed Systems
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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
 
Click for a nice Google Map.
Around the world...
 
phone
(+31) 015 2784433
 
fax
(+31) 015 2786632
 
address
TU Delft, Room HB09.050
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
Grid Workloads Archive Failure Trace Archive Performance Evaluation Tools P2P Research
The IN1105 course, 2009-2010 [02-2010] Course material: IN3305 Seminarium, Lecture on Literature Search - | -
[08-2009] Course material: IN1105 Introduction to Internet-Based Systems -
[01-2009] Ph.D. thesis: http://www.pds.ewi.tudelft.nl/~iosup/aiosup_phd_thesis.html
 
 Community
Program Committee Membership <-- click to see more details
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 Research
Gaming 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. 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, in print). journal Article Dynamic Resource Provisioning in Massively Multiplayer Online Games at IEEE TPDS 2010, PDF [1.0MB]
    keywords massively multiplayer online games, platform, virtualization, cloud computing.
  2. 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.
     
  3. 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]
    keywords massively multiplayer online games, platform, virtualization, cloud computing.
     
  4. 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.?, p.1--10 (accepted, in print). CAMEO: Continuous Analytics for Massively Multiplayer Online Games on Cloud Resources at ROIA 2009, PDF [0.5MB]
    keywords massively multiplayer online games, 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 above):
  1. A. Iosup, S. Ostermann, N. Yigitbasi, R. Prodan, Th. Fahringer, and D. Epema, Performance Analysis of Cloud Computing Services for MTC-Based Scientific Computing, (under submission). journal
    keywords cloud computing, scientific computing, performance evaluation.
     
  2. A. Iosup, N. Yigitbasi, and D. Epema, On the Performance Variability of Production Cloud Services, (under submission).
    keywords cloud computing, performance variability, social applications, Amazon Web Services, Google App Engine.
     
  3. 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 D.R. Avresky et al. (Eds.): Cloudcomp 2009, LNICST 34, pp. 115–131, 2010. Article A Performance Analysis of EC2 Cloud Computing Services for Scientific Computing at CloudComp 2009, PDF [0.5MB]
    keywords cloud computing, scientific computing, performance evaluation.
     
  4. 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. 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.
     
  2. 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.
     
  3. 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.
     
  4. 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.
     
  5. 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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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. 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). 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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The Tribler P2P File-Sharing System


We have developed a new cooperative downloading protocol which makes use of social groups, where members who trust each other cooperate to improve their download performance. Please visit the official Tribler web site for more details. You can also check the official developer's page for Tribler.
    Highlights:
  1. J. Pouwelse, P. Garbacki, J. Wang, A. Bakker, J.Yang, A. Iosup, D.H.J.Epema, M.Reinders, M. van Steen, H.Sips, Tribler: A social-based peer-to-peer system, Concurrency and Computation: Practice and Experience, 2007, 19:1-11 (accepted). Article, Tribler, PDF [200KB] | Article, Tribler, PS [3MB]
  2. 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. Best Paper Award!. Article, PDF [210KB]
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Peer-to-Peer (P2P) Traces: BitTorrent

The Delft BitTorrent Measurements web site
P2P Trace Analysis

We have completed a large-scale monitoring of a P2P file-sharing network (BitTorrent), with the purpose of correlating the P2P network properties with those of the underlying Internet. By using our custom MultiProbe environment running on top of 50 PlanetLab and over 100 DAS-2 nodes, we have managed to track ~500K peers in one week. Please visit my research web page for more details. A MultiProbe presentation, GP2PC/CCGrid'06 [PPT, 2MB] description of the measurements, and of MultiProbe, the framework used for them, was given in the ended GP2PC/CCGrid'06.
 
    Highlights:
  1. B. Zhang, A. Iosup, P. Garbacki, J. Pouwelse, A Unified Format for Traces of Peer-to-Peer Systems, In ACM Workshop on Large-Scale System and Application Performance (LSAP'09), in conjunction with the ACM/IEEE Int'l. Symp. on High Performance Distributed Computing (HPDC'09) (accepted). Article, A Unified Format for Traces of Peer-to-Peer Systems in LSAP'09, PDF [200KB]
    keywords standardization, peer-to-peer, traces, performance.
     
  2. 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 TU Delft/PDS/2005-002, ISBN 1387-2109). Article, PDF [200KB]MultiProbe presentation, GP2PC/CCGrid'06 [PPT, 2MB] Electronic EditionDBLP BiBTeX EntryDBLP Conference Entry
    info Large-scale underlay/overlay network measurements, P2P measurements and analysis, The Delft BitTorrent Measurements 2.
    info largest BitTorrent mesurements to date.
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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
 
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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Last modified: Fri, 5 February, 2010 12:49 PM
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